53
CHAPTER 3 CPU ARCHITECTURE
User’s Manual U15104EJ2V0UD
Table 3-4. Special Function Registers (1/3)
Address
Special Function Register (SFR) Name
Symbol
R/W
Bit Units for Manipulation After Reset
1 Bit
8 Bits 16 Bits
FF00H
Port 0
P0
R/W
—
00H
FF01H
Port 1
P1
R
—
FF03H
Port 3
P3
R/W
—
FF04H
Port 4
P4
—
FF05H
Port 5
P5
—
FF06H
Port 6
P6
—
FF07H
Port 7
P7
—
FF0CH
Port 12
P12
—
FF0DH
Port 13
P13
—
FF10H
A/D conversion result register 3
Note 1
ADCR3
—
—
—
—
—
FF11H
R
—
—
Undefined
FF12H
A/D converter mode register 3
ADM3
R/W
—
00H
FF13H
Analog input channel specification register 3
ADS3
—
—
FF15H
Power-fail comparison threshold value register 3
PFT3
—
—
FF16H
Power-fail comparison mode register 3
PFM3
—
FF1BH
POC status register
POCS
R&Reset
—
—
Retained
Note 2
FF20H
Port mode register 0
PM0
R/W
—
FFH
FF23H
Port mode register 3
PM3
—
FF24H
Port mode register 4
PM4
—
FF25H
Port mode register 5
PM5
—
FF26H
Port mode register 6
PM6
—
FF27H
Port mode register 7
PM7
—
FF2CH
Port mode register 12
PM12
—
FF34H
Pull-up resistor option register 4
PU4
—
00H
FF40H
Clock output select register
CKS
—
FF41H
BEEP clock select register 0
BEEPCL0
—
FF42H
Watchdog timer clock select register
WDCS
—
FF48H
External interrupt rising edge enable register
EGP
—
FF49H
External interrupt falling edge enable register
EGN
—
FF69H
Serial port select register 32
SIO32SEL
—
FF6AH
Serial I/O shift register 32
SIO32
—
—
Undefined
FF6BH
Serial operating mode register 32
CSIM32
—
00H
FF6CH
Serial I/O shift register 31
SIO31
—
—
Undefined
FF6DH
Serial operating mode register 31
CSIM31
—
00H
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.
Содержание mPD178053
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