NEC PD754244 Manuel D’Utilisation
CHAPTER 5 EEPROM
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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.