NEC mPD178054 Series User Manual page 53

Address Special Function Register (SFR) Name
FF00H Port 0
FF01H Port 1
FF03H Port 3
FF04H Port 4
FF05H Port 5
FF06H Port 6
FF07H Port 7
FF0CH Port 12
FF0DH Port 13
FF10H A/D conversion result register 3
FF11H
FF12H A/D converter mode register 3
FF13H Analog input channel specification register 3
FF15H Power-fail comparison threshold value register 3
FF16H Power-fail comparison mode register 3
FF1BH POC status register
FF20H Port mode register 0
FF23H Port mode register 3
FF24H Port mode register 4
FF25H Port mode register 5
FF26H Port mode register 6
FF27H Port mode register 7
FF2CH Port mode register 12
FF34H Pull-up resistor option register 4
FF40H Clock output select register
FF41H BEEP clock select register 0
FF42H Watchdog timer clock select register
FF48H External interrupt rising edge enable register
FF49H External interrupt falling edge enable register
FF69H Serial port select register 32
FF6AH Serial I/O shift register 32
FF6BH Serial operating mode register 32
FF6CH Serial I/O shift register 31
FF6DH Serial operating mode register 31
Notes 1. This register can be accessed only in 8-bit units. When ADCR3 is read, the value of FF11H is read.
2. The value of this register is 03H only at reset by power-on clear. This register is not reset by the RESET
pin or watchdog timer.
Caution Do not access addresses to which no SFR is assigned.
CHAPTER 3 CPU ARCHITECTURE
Table 3-4. Special Function Registers (1/3)
P0
P1
P3
P4
P5
P6
P7
P12
P13
Note 1
ADCR3
ADM3
ADS3
PFT3
PFM3
POCS
PM0
PM3
PM4
PM5
PM6
PM7
PM12
PU4
CKS
BEEPCL0
WDCS
EGP
EGN
SIO32SEL
SIO32
CSIM32
SIO31
CSIM31
User's Manual U15104EJ2V0UD
Symbol R/W Bit Units for Manipulation After Reset
1 Bit 8 Bits 16 Bits
R/W
R
R/W
— —
R —
R/W
—
—
R&Reset —
R/W
—
—
— 00H
—
—
—
—
—
—
—
—
— — —
— Undefined
— 00H
—
—
—
Note 2
— Retained
— FFH
—
—
—
—
—
—
— 00H
—
—
—
—
—
—
— Undefined
— 00H
— Undefined
— 00H
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