Archive for April, 2015

PostHeaderIcon Break IC PIC12C671 Eeprom

Break IC PIC12C671 Eeprom

 

We can Break IC PIC12C671 Eeprom, please view the IC PIC12C671 features for your reference:

High-Performance RISC CPU:

· Only 35 single word instructions to learn

· All instructions are single cycle (400 ns) except for program branches which are two-cycle

· Operating speed: DC – 10 MHz clock input DC – 400 ns instruction cycle when Break IC

· 14-bit wide instructions 8-bit wide data path

· Interrupt capability

· Special function hardware registers

· 8-level deep hardware stack

· Direct, indirect and relative addressing modes for data and instructions if Break IC

Peripheral Features:

· Four-channel, 8-bit A/D converter

· 8-bit real time clock/counter (TMR0) with 8-bit programmable prescaler

· 1,000,000 erase/write cycle EEPROM data memory

· EEPROM data retention > 40 years

Special Microcontroller Features:

In-Circuit Serial Programming (ICSP™)

Internal 4 MHz oscillator with programmable calibration before Break IC

Selectable clockout

Power-on Reset (POR)

Power-up Timer (PWRT) and Oscillator Start-up

Timer (OST)

Watchdog Timer (WDT) with its own on-chip RC oscillator for reliable operation after Break IC

Power saving SLEEP mode

Interrupt-on-pin change (GP0, GP1, GP3)

Internal pull-ups on I/O pins (GP0, GP1, GP3)

Internal pull-up on MCLR pin

Selectable oscillator options:

– INTRC: Precision internal 4 MHz oscillator for Break IC

– EXTRC: External low-cost RC oscillator

– XT:   Standard crystal/resonator

– HS:   High speed crystal/resonator

– LP:   Power saving, low frequency crystal

CMOS Technology:

· Low-power, high-speed CMOS EPROM/EEPROM technology when Break IC

· Fully static design

· Wide operating voltage range 2.5V to 5.5V

· Commercial, Industrial and Extended temperature ranges

· Low power consumption

< 2 mA @ 5V, 4 MHz

15 µA typical @ 3V, 32 kHz

< 1 µA typical standby current before Break IC

PostHeaderIcon Break Mcu PIC16F876 Flash

Break Mcu PIC16F876 Flash

 

We can Break Mcu PIC16F876 Flash, please view the Mcu PIC16F876 features for your reference:

The STATUS register contains the arithmetic status of the ALU, the RESET status and the bank select bits for data memory.

The STATUS register can be the destination for any instruction, as with any other register. If the STATUS register is the destination for an instruction that affects the Z, DC or C bits, then the write to these three bits is disabled when Break Mcu.

These bits are set or cleared according to the device logic. Furthermore, the TO and PD bits are not writable, therefore, the result of an instruction with the STATUS register as destination may be different than intended if Break Mcu.

For example, CLRF STATUS will clear the upper three bits and set the Z bit. This leaves the STATUS register as 000u u1uu (where u = unchanged). It is recommended, therefore, that only BCF, BSF, SWAPF and MOVWF instructions are used to alter the STATUS register, because these instructions do not affect the Z, C or DC bits from the STATUS register after Break Mcu.

For other instructions not affecting any status bits, see the “Instruction Set Summary.”

The OPTION_REG Register is a breakable and writable register, which contains various control bits to configure the TMR0 prescaler/WDT postscaler (single assignable register known also as the prescaler), the External INT Interrupt, TMR0 and the weak pull-ups on PORTB when Break Mcu.

The program counter (PC) is 13-bits wide. The low byte comes from the PCL register, which is a breakable and writable register. The upper bits (PC<12:8>) are not breakable, but are indirectly writable through the PCLATH register. On any RESET, the upper bits of the PC will be cleared. Figure 2-5 shows the two situations for the loading of the PC if Break Mcu.

The upper example in the figure shows how the PC is loaded on a write to PCL (PCLATH<4:0> → PCH). The lower example in the figure shows how the PC is loaded during aCALL orGOTO instruction (PCLATH<4:3> → PCH). All PIC16F87X devices are capable of addressing a continuous 8K word block of program memory when Break Mcu.

The CALL and GOTO instructions provide only 11 bits of address to allow branching within any 2K program memory page. When doing aCALL or GOTO instruction, the upper 2 bits of the address are provided by PCLATH<4:3>. When doing a CALL or GOTO instruction, the user must ensure that the page select bits are programmed so that the desired program memory page is addressed before Break Mcu.

If a return from a CALL instruction (or interrupt) is executed, the entire 13-bit PC is popped off the stack. Therefore, manipulation of the PCLATH<4:3> bits is not required for the return instructions (which POPs the address from the stack) after Break Mcu.

PostHeaderIcon Break IC PIC16F873 Software

Break IC PIC16F873 Software

We can Break IC PIC16F873 Software, please view the IC PIC16F873 features for your reference:

 

· High performance RISC CPU

· Only 35 single word instructions to learn

· All single cycle instructions except for program branches which are two cycle

· Operating speed: DC – 20 MHz clock input DC – 200 ns instruction cycle when Break IC

· Up to 8K x 14 words of FLASH Program Memory, Up to 368 x 8 bytes of Data Memory (RAM) Up to 256 x 8 bytes of EEPROM Data Memory

· Pinout compatible to the PIC16C73B/74B/76/77

· Interrupt capability (up to 14 sources)

· Eight level deep hardware stack

· Direct, indirect and relative addressing modes

· Power-on Reset (POR)

 

· Power-up Timer (PWRT) and Oscillator Start-up Timer (OST) if Break IC

· Watchdog Timer (WDT) with its own on-chip RC oscillator for reliable operation

· Programmable code protection

· Power saving SLEEP mode

· Selectable oscillator options before Break IC

· Low power, high speed CMOS FLASH/EEPROM technology

· Fully static design

· In-Circuit Serial Programming (ICSP) via two pins

· Single 5V In-Circuit Serial Programming capability

· In-Circuit Debugging via two pins

· Processor break/write access to program memory before Break IC

· Wide operating voltage range: 2.0V to 5.5V

· High Sink/Source Current: 25 mA

· Commercial, Industrial and Extended temperature ranges

· Low-power consumption:

– < 0.6 mA typical @ 3V, 4 MHz

– 20 µA typical @ 3V, 32 kHz

– < 1 µA typical standby current

Peripheral Features:

· Timer0: 8-bit timer/counter with 8-bit prescaler after Break IC

· Timer1: 16-bit timer/counter with prescaler, can be incremented during SLEEP via external crystal/clock

· Timer2: 8-bit timer/counter with 8-bit period register, prescaler and postscaler

· Two Capture, Compare, PWM modules after Break IC

– Capture is 16-bit, max. resolution is 12.5 ns

– Compare is 16-bit, max. resolution is 200 ns

– PWM max. resolution is 10-bit

· 10-bit multi-channel Analog-to-Digital converter

· Synchronous Serial Port (SSP) with SPI (Master mode) and I2C (Master/Slave) when Break IC

· Universal Synchronous Asynchronous Receiver Transmitter (USART/SCI) with 9-bit address detection

· Parallel Slave Port (PSP) 8-bits wide, with external RD, WR and CS controls (40/44-pin only)

· Brown-out detection circuitry for Brown-out Reset (BOR)

PostHeaderIcon Break Mcu PIC16F527 Heximal

Break Mcu PIC16F527 Heximal

 

We can Break Mcu PIC16F527 Heximal, please view the Mcu PIC16F527 features for your reference:

The PIC16F526 device from Micromcu Technology is low-cost, high-performance, 8-bit, fully-static, Flash-based CMOS microcontrollers. It employs a RISC architecture with only 33 single-word/single-cycle instructions. All instructions are single cycle (200 ms) except for program branches, which take two cycles when Break Mcu.

The PIC16F526 device delivers performance an order of magnitude higher than their competitors in the same price category. The 12-bit wide instructions are highly symmetrical, resulting in a typical 2:1 code compression over other 8-bit microcontrollers in its class if Break Mcu.

The easy-to-use and easy to remember instruction set reduces development time significantly. The PIC16F526 product is equipped with special features that reduce system cost and power requirements. The Power-on Reset (POR) and Device Reset Timer (DRT) eliminate the need for external Reset circuitry after Break Mcu.

There are four oscillator configurations to choose from, including INTRC Internal Oscillator mode and the power-saving LP (Low-Power) Oscillator mode. Power-Saving Sleep mode, Watchdog Timer and code protection features improve system cost, power and reliability before Break Mcu.

The PIC16F526 device is available in the cost-effective Flash programmable version, which is suitable for production in any volume. The customer can take full advantage of Micromcu’s price leadership in Flash programmable microcontrollers, while benefiting from the Flash programmable flexibility after Break Mcu.

The PIC16F526 product is supported by a full-featured macro assembler, a software simulator, an in-circuit emulator, a ‘C’ compiler, a low-cost development programmer and a full featured programmer. All the tools are supported on IBM® PC and compatible machines if Break Mcu.

The PIC16F526 device fits in applications ranging from personal care appliances and security systems to low-power remote transmitters/receivers. The Flash technology makes customizing application programs (transmitter codes, appliance settings, receiver frequencies, etc.) extremely fast and convenient when Break Mcu.

The small footprint packages, for through hole or surface mounting, make these microcontrollers perfect for applications with space limitations. Low cost, low power, high performance, ease of use and I/O flexibility make the PIC16F526 device very versatile even in areas where no microcontroller use has been considered before (e.g., timer functions, logic and PLDs in larger systems and coprocessor applications) if Break Mcu.

PostHeaderIcon Reverse engineering Microcontroller PIC16F526 Binary

Reverse engineering Microcontroller PIC16F526 Binary

We can Reverse engineering Microcontroller PIC16F526 Binary, please view the Microcontroller PIC16F526 features for your reference:

High-Performance RISC CPU:

· Only 33 Single-Word Instructions

· All Single-Cycle Instructions except for Program Branches which are Two-Cycle when Reverse engineering Microcontroller

· Two-Level Deep Hardware Stack

· Direct, Indirect and Relative Addressing modes for Data and Instructions

· Operating Speed:

– DC – 20 MHz crystal oscillator

– DC – 200 ns instruction cycle

· On-chip Flash Program Memory:

– 1024 x 12 if Reverse engineering Microcontroller

· General Purpose Registers (SRAM):

– 67 x 8

· Flash Data Memory:

– 64 x 8

Special Microcontroller Features:

· 8 MHz Precision Internal Oscillator:

– Factory calibrated to ±1% after Reverse engineering Microcontroller

· In-Circuit Serial Programming™ (ICSP™)

· In-Circuit Debugging (ICD) Support

· Power-On Reset (POR)

· Device Reset Timer (DRT)

· Watchdog Timer (WDT) with Dedicated On-Chip RC Oscillator for Reliable Operation

· Programmable Code Protection

· Multiplexed MCLR Input Pin when Reverse engineering Microcontroller

· Internal Weak Pull-ups on I/O Pins

· Power-Saving Sleep mode

· Wake-Up from Sleep on Pin Change

· Selectable Oscillator Options:

– INTRC: 4 MHz or 8 MHz precision Internal RC oscillator

– EXTRC: External low-cost RC oscillator

– XT:   Standard crystal/resonator

– HS:   High-speed crystal/resonator after Reverse engineering Microcontroller

– LP:   Power-saving, low-frequency crystal

– EC:   High-speed external clock input

Low-Power Features/CMOS Technology:

· Standby current:

– 100 nA @ 2.0V, typical

· Operating current:

– 11 mA @ 32 kHz, 2.0V, typical

– 175 mA @ 4 MHz, 2.0V, typical

· Watchdog Timer current:

– 1 mA @ 2.0V, typical when Reverse engineering Microcontroller

– 7 mA @ 5.0V, typical

· High Endurance Program and Flash Data Memory cells:

– 100,000 write Program Memory endurance

– 1,000,000 write Flash Data Memory endurance

– Program and Flash Data retention: >40 years

· Fully Static Design

· Wide Operating Voltage Range: 2.0V to 5.5V:

– Wide temperature range

– Industrial: -40°C to +85°C

– Extended: -40°C to +125°C before Reverse engineering Microcontroller

Peripheral Features:

· 12 I/O Pins:

– 11 I/O pins with individual direction control

– 1 input-only pin

– High current sink/source for direct LED drive

– Wake-up on change

– Weak pull-ups

· 8-bit Real-time Clock/Counter (TMR0) with 8-bit Programmable Prescaler

· Two Analog Comparators:

– Comparator inputs and output accessible externally

– One comparator with 0.6V fixed on-chip absolute voltage reference (VREF)

– One comparator with programmable on-chip voltage reference (VREF)

· Analog-to-Digital (A/D) Converter:

– 8-bit resolution after Reverse engineering Microcontroller

– 3-channel external programmable inputs

– 1-channel internal input to internal absolute 0.6 voltage reference

PostHeaderIcon Recover Microcontroller PIC16C641 Eeprom

We can Recover Microcontroller PIC16C641 Eeprom, please view the Microcontroller PIC16C641 features for your reference:

High Performance RISC CPU:

· Only 35 instructions to learn

· All single-cycle instructions (200 ns), except for program branches which are two-cycle when Recover Microcontroller

· Operating speed:

DC – 20 MHz clock input

– DC – 200 ns instruction cycle

· Interrupt capability

· 8-level deep hardware stack

· Direct, Indirect and Relative addressing modes

Peripheral Features:

· Up to 33 I/O pins with individual direction control if Recover Microcontroller

· High current sink/source for direct LED drive

· Analog comparator module with:

– Two analog comparators

– Programmable on-chip voltage reference (VREF) module

– Programmable input multiplexing from device inputs and internal voltage reference

– Comparator outputs can be output signals

· Timer0: 8-bit timer/counter with 8-bit programmable prescaler

Special Microcontroller Features:

· Power-on Reset (POR)

· Power-up Timer (PWRT) and Oscillator Start-up Timer (OST)

· Brown-out Reset

· Watchdog Timer (WDT) with its own on-chip RC oscillator for reliable operation

· Programmable code protection

· Power saving SLEEP mode when MCU RECOVER

· Selectable oscillator options

· Serial in-circuit programming (via two pins)

· Four user programmable ID locations

· Program Memory Parity Error checking circuitry with Parity Error Reset (PER) before Recover Microcontroller

· CMOS Technology:

· Low-power, high-speed CMOS EPROM technology

· Fully static design

· Wide operating voltage range: 3.0V to 6.0V

· Commercial, Industrial and Automotive temperature ranges

· Low power consumption

– < 2.0 mA @ 5.0V, 4.0 MHz

– 15 µA typical @ 3.0V, 32 kHz

– < 1.0 µA typical standby current @ 3.0V

PostHeaderIcon Recover MCU PIC12CR509A Flash

We can Recover MCU PIC12CR509A Flash, please view the MCU PIC12CR509A features for your reference:

PIC12CE518 and PIC12CE519 only.

The PIC12CE518 and PIC12CE519 each have 16 bytes of EEPROM data memory. The EEPROM memory has an endurance of 1,000,000 erase/write cycles and a data retention of greater than 40 years. The EEPROM data memory supports a bi-directional 2-wire bus and data transmission protocol when Recover MCU.

These two-wires are serial data (SDA) and serial clock (SCL), that are mapped to bit6 and bit7, respectively, of the GPIO register (SFR 06h). Unlike the GP0-GP5 that are connected to the I/O pins, SDA and SCL are only connected to the internal EEPROM peripheral. For most applications, all that is required is calls to the following functions when Recover MCU:

The code for these functions is available on our website www.microchip.com. The code will be accessed by either including the source code FL51XINC.ASM or by linking FLASH5IX.ASM. It is very important to check the return codes when using these calls, and retry the operation if unsuccessful if Recover MCU.

Unsuccessful return codes occur when the EE data memory is busy with the previous write, which can take up to 4 mS. SDA is a bi-directional pin used to transfer addresses and data into and data out of the device before Recover MCU.

For normal data transfer SDA is allowed to change only during SCL low. Changes during SCL high are reserved for indicating the START and STOP conditions. The EEPROM interface is a 2-wire bus protocol consisting of data (SDA) and a clock (SCL) when Recover MCU.

Although these lines are mapped into the GPIO register, they are not accessible as external pins; only to the i internal EEPROM peripheral. SDA and SCL operation is also slightly different than GPO-GP5 as listed below. Namely, to avoid code overhead in modifying the TRIS register, both SDA and SCL are always outputs after Recover MCU.

To read data from the EEPROM peripheral requires outputting a ‘1’ on SDA placing it in high-Z state, where only the internal 100K pull-up is active on the SDA line. SDA:

Built-in 100K (typical) pull-up to VDD Open-drain (pull-down only)

Always an output

Outputs a ‘1’ on reset

SCL:

Full CMOS output

Always an output

Outputs a ‘1’ on reset

The following example requires:

· Code Space: 77 words

· RAM Space: 5 bytes (4 are overlayable)

· Stack Levels:1 (The call to the function itself. The functions do not call any lower level functions.)

· Timing:

– WRITE_BYTE takes 328 cycles

– READ_CURRENT takes 212 cycles

– READ_RANDOM takes 416 cycles.

· IO Pins: 0 (No external IO pins are used)

This code must reside in the lower half of a page. The code achieves it’s small size without additional calls through the use of a sequencing table. The table is a list of procedures that must be called in order. The table uses an ADDWF PCL,F instruction, effectively a computed goto, to sequence to the next procedure. However the ADDWF PCL,F instruction yields an 8 bit address, forcing the code to reside in the first 256 addresses of a page.

PostHeaderIcon Break IC PIC12CE519 Flash

Break IC PIC12CE519 Flash

We can Break IC PIC12CE519 Flash, please view the IC PIC12CE519 features for your reference:

As with any other register, the I/O register can be written and read under program control. However, read instructions (e.g., MOVF GPIO,W) always read the I/O pins independent of the pin’s input/output modes. On RESET, all I/O ports are defined as input (inputs are at hi-impedance) since the I/O control registers are all set. See Section 7.0 for SCL and SDA description for PIC12CE5XX when Break IC.

GPIO is an 8-bit I/O register. Only the low order 6 bits are used (GP5:GP0). Bits 7 and 6 are unimplemented and read as ’0′s. Please note that GP3 is an input only pin. The configuration word can set several I/O’s to alternate functions. When acting as alternate functions the pins will read as ‘0’ during port read. Pins GP0, GP1, and GP3 can be configured with weak pull-ups and also with wake-up on change after Break IC.

The wake-up on change and weak pull-up functions are not pin selectable. If pin 4 is configured as MCLR, weak pull-up is always on and wake-up on change for this pin is not enabled. The output driver control register is loaded with the contents of the W register by executing the TRIS instruction. A ’1′ from a TRIS register bit puts the corresponding output driver in a hi-impedance mode before Break IC.

A ’0′ puts the contents of the output data latch on the selected pins, enabling the output buffer. The exceptions are GP3 which is input only and GP2 which may be controlled by the option register, The equivalent circuit for an I/O port pin is shown in Figure 5-1. All port pins, except GP3 which is input only, may be used for both input and output operations if Break IC.

For input operations these ports are non-latching. Any input must be present until read by an input instruction (e.g., MOVF GPIO,W). The outputs are latched and remain unchanged until the output latch is rewritten. To use a port pin as output, the corresponding direction control bit in TRIS must be cleared (= 0). For use as an input, the corresponding TRIS bit must be set after Break IC.

Any I/O pin (except GP3) can be programmed individually as input or output. Some instructions operate internally as read followed by write operations. The BCF and BSF instructions, for example, read the entire port into the CPU, execute the bit operation and re-write the result. Caution must be used when these instructions are applied to a port where one or more pins are used as input/outputs before Break IC.

For example, a BSF operation on bit5 of GPIO will cause all eight bits of GPIO to be read into the CPU, bit5 to be set and the GPIO value to be written to the output latches. If another bit of GPIO is used as a bi- directional I/O pin (say bit0) and it is defined as an input at this time, the input signal present on the pin itself would be read into the CPU and rewritten to the data latch of this particular pin, overwriting the previous content when Break IC.

As long as the pin stays in the input mode, no problem occurs. However, if bit0 is switched into output mode later on, the content of the data latch. The actual write to an I/O port happens at the end of may now be unknown after Break IC.

PostHeaderIcon Recover Chip PIC12CE518 Binary

Recover Chip PIC12CE518 Binary

 

We can Recover Chip PIC12CE518 Binary, please view the CHIP PIC12CE518 features for your reference:

As a program instruction is executed, the Program Counter (PC) will contain the address of the next program instruction to be executed. The PC value is increased by one every instruction cycle, unless an instruction changes the PC when Recover Chip .

For a GOTO instruction, bits 8:0 of the PC are provided by the GOTO instruction word. The PC Latch (PCL) is mapped to PC<7:0>. Bit 5 of the STATUS register provides page information to bit 9 of the PC (Figure 4- 8) if Recover Chip.

For a CALL instruction, or any instruction where the PCL is the destination, bits 7:0 of the PC again are provided by the instruction word. However, PC<8> does not come from the instruction word, but is always cleared (Figure 4-8) if Recover Chip.

Instructions where the PCL is the destination, or Modify PCL instructions, include MOVWF PC, ADDWF PC, and BSF PC,5.

The Program Counter is set upon a RESET, which means that the PC addresses the last location in the last page i.e., the oscillator calibration instruction. After executing MOVLW XX, the PC will roll over to location 00h, and begin executing user code after Recover Chip.

The STATUS register page preselect bits are cleared upon a RESET, which means that page 0 is pre-selected.

Therefore, upon a RESET, a GOTO instruction will automatically cause the program to jump to page 0 until the value of the page bits is altered. PIC12C5XX devices have a 12-bit wide L.I.F.O. hardware push/pop stack before Recover Chip.

A CALL instruction will push the current value of stack 1 into stack 2 and then push the current program counter value, incremented by one, into stack level 1. If more than two sequential CALL’s are executed, only the most recent two return addresses are stored when Recover Chip.

ARETLW instruction will pop the contents of stack level 1 into the program counter and then copy stack level contents into level 1. If more than two sequential RETLW’s are executed, the stack will be filled with the address previously stored in level 2 if Recover Chip. Note that the W register will be loaded with the literal value specified in the instruction. This is particularly useful for the implementation of data look-up tables within the program memory.

Upon any reset, the contents of the stack remain unchanged, however the program counter (PCL) will also be reset to Recover Chip.

PostHeaderIcon Reverse engineering Microcontroller PIC12C509A Binary

Reverse engineering Microcontroller PIC12C509A Binary

 

We can Reverse engineering Microcontroller PIC12C509A Binary, please view the Microcontroller PIC12C509A features for your reference:

PIC12C5XX memory is organized into program memory and data memory. For devices with more than 512 bytes of program memory, a paging scheme is used if Reverse engineering Microcontroller.

Program memory pages are accessed using one STATUS register bit. For the PIC12C509, PIC12C509A, PICCR509A and PIC12CE519 with a data memory register file of more than 32 registers, a banking scheme is used. Data memory banks are accessed using the File Select Register (FSR) when Reverse engineering Microcontroller.

The PIC12C5XX devices have a 12-bit Program Counter (PC) capable of addressing a 2K x 12 program memory space. Only the first 512 x 12 (0000h-01FFh) for the PIC12C508, PIC12C508A and PIC12CE518 and 1K x 12 (0000h-03FFh) for the PIC12C509, PIC12C509A, PIC12CR509A, and PIC12CE519 are physically implemented after Reverse engineering Microcontroller. Refer to Figure 4-1. Accessing a location above these boundaries will cause a wrap around within the first 512 x 12 space (PIC12C508, PIC12C508A and PIC12CE518) or 1K x 12 space (PIC12C509, PIC12C509A, PIC12CR509A and PIC12CE519) if Reverse engineering Microcontroller. The effective reset vector is at 000h, (see Figure 4-1). Location 01FFh (PIC12C508, PIC12C508A and PIC12CE518) or location 03FFh (PIC12C509, PIC12C509A, PIC12CR509A and PIC12CE519) contains the internal clock oscillator calibration value. This value should never be overwritten when Reverse engineering Microcontroller.

As a program instruction is executed, the Program Counter (PC) will contain the address of the next program instruction to be executed. The PC value is increased by one every instruction cycle, unless an instruction changes the PC when Reverse engineering Microcontroller.

For a GOTO instruction, bits 8:0 of the PC are provided by the GOTO instruction word. The PC Latch (PCL) is mapped to PC<7:0>. Bit 5 of the STATUS register provides page information to bit 9 of the PC (Figure 4- 8).For a CALL instruction, or any instruction where the PCL is the destination before Reverse engineering Microcontroller, bits 7:0 of the PC again are provided by the instruction word. However, PC<8> does not come from the instruction word, but is always cleared (Figure 4-8).

Instructions where the PCL is the destination, or Modify PCL instructions, include MOVWF PC, ADDWF PC, and BSF PC,5. The Program Counter is set upon a RESET, which means that the PC addresses the last location in the last page i.e., after Reverse engineering Microcontroller the oscillator calibration instruction. After executing MOVLW XX, the PC will roll over to location 00h, and begin executing user code.

The STATUS register page preselect bits are cleared upon a RESET, which means that page 0 is pre-selected. Therefore, upon a RESET, a GOTO instruction will automatically cause the program to jump to page 0 until the value of the page bits is altered if Reverse engineering Microcontroller.