Hardware manual

Rev. 3.0, 09/98, page 43 of 361
Op
8715 0
EEPROM
Op: Operation field
Op
Figure 2.10 Block Data Transfer Instruction/EEPROM Write Operation Code
Notes on EEPMOV Instruction
Note 1
1. The EEPMOV instruction is a block data transfer instruction. It moves the number of bytes
specified by R4L from the address specified by R5 to the address specified by R6.
R5
→
R5 + R4L →
←
R6
←
R6 + R4L
2. When setting R4L and R6, make sure that the final destination address (R6 + R4L) does not
exceed H'FFFF. The value in R6 must not change from H'FFFF to H'0000 during execution of
the instruction.
H'FFFF
Not allowed
R5 →
R5 + R4L
→
←
R6
← R6 + R4L
Note 2
CPU will malfunction after EEPMOV instruction execution, in the following conditions.
EEPMOV instruction performs block data transfer function.
• Condition
When the following conditions are all true:
 The LSI is set to expanded mode (i.e. mode 1 or mode 2).
 The destination address of EEPMOV instruction is external area.
 At least one wait state is inserted to the last write bus cycle to the destination address by
EEPMOV instruction.