UPD78F0138 NEC, UPD78F0138 Datasheet - Page 435
UPD78F0138
Manufacturer Part Number
UPD78F0138
Description
(UPD78xxxx) 8-Bit Single-Chip Microcontrollers
Manufacturer
NEC
Datasheet
1.UPD78F0138.pdf
(558 pages)
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26.7 Cautions for ROM Correction
(1) Address values set in correction address registers 0 and 1 (CORAD0, CORAD1) must be addresses where
(2) Correction address registers 0 and 1 (CORAD0, CORAD1) should be set when the correction enable flag
(3) Do not set the address value of instruction immediately after the instruction that sets the correction enable flag
(4) Do not set the address value in table area of table reference instruction (CALLT instruction) (0040H to 007FH),
(5) Do not set two addresses immediately after the instructions shown below to correction address registers 0 and
instruction codes are stored.
(COREN0, COREN1) is 0 (when the correction branch is in disabled state). If address is set to CORAD0 or
CORAD1 when COREN0 or COREN1 is 1 (when the correction branch is in enabled state), the correction
branch may start with the different address from the set address value.
(COREN0, COREN1) to 1, to correction address register 0 or 1 (CORAD0, CORAD1); the correction branch
may not start.
and the address value in vector table area (0000H to 003FH) to correction address registers 0 and 1
(CORAD0, CORAD1).
1 (CORAD0, CORAD1). (that is, when the mapped terminal address of these instructions is N, do not set the
address values of N + 1 and N + 2.)
• RET
• RETI
• RETB
• BR $addr16
• STOP
• HALT
CHAPTER 26 ROM CORRECTION
User’s Manual U16228EJ2V0UD
435
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