Extract IC PIC16LF54 Code from its memory needs to decapsulate the microcontroller silicon package, and get access to the memory through modify the circuitry pattern by IC breaking method;

When a prescaler is used, the external clock input is divided by the asynchronous ripple counter-type prescaler so that the prescaler output is symmetrical.

For the external clock to meet the sampling requirement, the ripple counter must be taken into account. Therefore, it is necessary for T0CKI to have a period of at least 4TOSC (and a small RC delay of 40 ns) divided by the prescaler value if Extract chip at87f51rc code.

The only requirement on T0CKI high and low time is that they do not violate the minimum pulse width requirement of 10 ns. Refer to parameters 40, 41 and 42 in the electrical specification of the desired device.

Since the prescaler output is synchronized with the internal clocks, there is a small delay from the time the external clock edge occurs to the time the Timer0 module is actually incremented.

Figure 6-4 shows the delay from the external clock edge to the timer incrementing. If the option register is set to read TIMER0 from the pin, the port is forced to an input regardless of the TRIS register setting.

The prescaler assignment is fully under software control (i.e., it can be changed “on the fly” during program execution). To avoid an unintended device RESET, the following instruction sequence (Example 6-1) must be executed when changing the prescaler assignment from Timer0 to the WDT when Extract mcu embedded firmware.

The PIC16LF54 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. 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;