uPD789871 Subseries 8-Bit Single-Chip Microcontrollers PUM

44
CHAPTER 3 CPU ARCHITECTURE
Table 3-3. Special Function Register List
Address Special Function Register (SFR) Name Symbol R/W Bit Units for Manipulation After Reset
Preliminary User’s Manual U14938EJ1V0UM
1 Bit 8 Bits 16 Bits
FF00H Port 0 P0 R/W √ √ — 00H
FF01H Port 1 P1 √ √ —
FF02H Port 2 P2 √ √ —
FF08H Port 8 P8 √ √ —
FF09H Port 9 P9 √ √ —
FF20H Port mode register 0 PM0 √ √ — FFH
FF21H Port mode register 1 PM1 √ √ —
FF22H Port mode register 2 PM2 √ √ —
FF32H Pull-up register option register B2 PUB2 √ √ — 00H
FF42H Watchdog time clock select register WDCS — √ —
FF4AH Watch time mode control register WTM √ √ —
FF50H 8-bit compare register 80 CR80 W — √ — Undefined
FF51H 8-bit timer counter 80 TM80 R — √ — 00H
FF53H 8-bit timer mode control register 80 TMC80 R/W √ √ —
FF54H 8-bit compare register 81 CR81 W — √ — Undefined
FF55H 8-bit timer counter 81 TM81 R — √ — 00H
FF57H 8-bit timer mode control register 81 TMC81 R/W √ √ —
FF58H Remote control timer control register 50 TMC50 √ √ —
FF5AH Remote control timer capture register 50 CP50 R — √ —
FF5BH Remote control timer capture register 51 CP51 — √ —
FF72H Serial operation mode register 11 CSIM10 R/W √ √ —
FF74H Transmit/receive shift register 10 SIO10 — √ — Undefined
FFA0H Display mode register 0 DSPM0 √ √ — 10H
FFA1H Display mode register 1 DSPM1 √ √ — 01H
FFA2H Display mode register 2 DSPM2 √ √ — 00H
FFE0H Interrupt request flag register 0 IF0 √ √ —
FFE1H Interrupt request flag register 1 IF1 √ √ —
FFE4H Interrupt mask flag register 0 MK0 √ √ — FFH
FFE5H Interrupt mask flag register 1 MK1 √ √ —
FFECH External interrupt mode register 0 INTM0 — √ — 00H
FFF0H Suboscillation mode register SCKM √ √ —
FFF2H Subclock control register CSS √ √ —
FFF7H Pull-up register option register 0 PU0 √ √ —
FFF9H Watchdog timer mode register WDTM √ √ —
FFFAH Oscillation stabilization timer select register OSTS — √ — 04H
FFFBH Processor clock control register PCC √ √ — 02H