NEC PD754144 - Manual (Page 83)

CHAPTER 5 EEPROM
83 User’s Manual U10676EJ3V0UM
5.5 EEPROM Manipulation Method
5.5.1 EEPROM manipulation instructions
Instructions that can be used to manipulate the EEPROM are shown below, divided into read instructions and
write instructions.
(1) Read manipulation instructions
Instruction Group Mnemonic Operand
Transfer instruction MOV XA, @HL
MOV XA, mem
Compare instruction SKE XA, @HL
Remark Operation instruction such as ADDS, AND, etc., cannot be used.
(2) Write manipulation instructions
Instruction Group Mnemonic Operand
Transfer instruction MOV @HL, XA
MOV mem, XA
XCH XA, @HL
XCH XA, mem
Remark INCS (increment/decrement instruction) cannot be used.
An 8-bit memory manipulation instruction is used to manipulate EEPROM. Furthermore, a bit memory
manipulation instruction can be used to check EWST.
A 4-bit memory manipulation instruction cannot be used.