Special Function Registers - NEC PD789860 User Manual

Address Special Function Register (SFR) Name
FF00H Port 0
FF02H Port 2
FF04H Port 4
FF10H Bit sequential buffer 10 data register L BSFRL10
FF11H Bit sequential buffer 10 data register H BSFRH10
FF20H Port mode register 0
FF22H Port mode register 2
FF42H Timer clock selection register 2
FF50H 8-bit compare register 30
FF51H 8-bit timer counter 30
FF52H 8-bit timer mode control register 30
FF53H 8-bit compare register 40
FF54H 8-bit compare register H40
FF55H 8-bit timer counter 40
FF56H 8-bit timer mode control register 40
FF57H Carrier generator output control
register 40
FF60H Bit sequential buffer output control
register 10
FFD8H EEPROM write control register 10
FFDDH Power-on-clear register 1
FFDEH Low-voltage detection register 1
FFDFH Low-voltage detection level selection
register 1
FFE0H Interrupt request flag register 0
FFE4H Interrupt mask flag register 0
FFF9H Watchdog timer mode register
FFFAH Oscillation stabilization time selection
Note 3
register
FFFBH Processor clock control register
Notes 1. Specify address FF10H directly for 16-bit access.
2. This value is 04H only after a power-on-clear reset.
µ
3. PD789860 Subseries only
48
CHAPTER 4 CPU ARCHITECTURE
Table 4-3. Special Function Registers
Symbol R/W Number of Bits Manipulated Simultaneously
P0 R/W
P2
P4 R
W
PM0 R/W
PM2
TCL2
CR30 W
TM30 R
TMC30 R/W
CR40 W
CRH40
TM40 R
TMC40 R/W
TCA40 W
BSFC10 R/W
EEWC10
POCF1
LVIF1
LVIS1
IF0
MK0
WDTM
OSTS
PCC
User's Manual U14826EJ5V0UD
1 Bit 8 Bits 16 Bits
√ √
√ √
√ √
− √
− √
√ √
√ √
− √
− √
− √
√ √
− √
− √
− √
√ √
− √
√ √
√ √
√ √
√ √
√ √
√ √
√ √
√ √
− √
√ √
After Reset
−
00H
−
−
√
Note 1
Undefined
−
FFH
−
−
00H
−
Undefined
−
00H
−
−
Undefined
−
−
00H
−
−
−
−
08H
−
Note 2
00H
−
00H
−
−
−
FFH
−
00H
−
04H
−
02H