Data EEPROM Programming
Julio Sanchez, Maria P. Canton · 2018
PICs use Electrically-Erasable Programmable (EEPROM)-type memory internally as flash program memory and as data memory. This chapter presents EEPROM data memory. EEPROM is found in flash drives, BIOS chips, and in flash memory and EEPROM data storage memory in PICs and other microcontrollers. The PIC programmer regards EEPROM data memory as on board EEPROM memory and EEPROM memory ICs as separate circuit components. Some PICs contain internal EEPROM data memory that is accessible to code. In addition to on board EEPROM memory that is available in many PICs, a circuit can contain EEPROM memory in separate integrated circuits. EEPROM devices are furnished in two different interface types: serial and parallel. Read and write operations to large EEPROMS, those with a two-byte address space, are identical to the ones described, except that there are two address bytes. The first one holds the high-order element and the second one the low-order.