
CHAPTER 3 CPU ARCHITECTURE
66
User’s Manual U15075EJ1V0UM00
Table 3-4. Special Function Register List (1/2)
Bit Manipulation Unit
Address
Special Function Register (SFR) Name
Symbol
R/W
1 Bit
8 Bits
16 Bits
After Reset
FF00H
Port 0
P0
√√
FF01H
Port 1
P1
√√
FF02H
Port 2
P2
√√
FF03H
Port 3
P3
√√
FF05H
Port 5
P5
R/W
√√
FF06H
Port 6
P6
R
√√
FF07H
Port 7
P7
√√
FF08H
Port 8
Note 1
P8
√√
FF09H
Port 9
Note 1
P9
R/W
√√
00H
FF0CH
8-bit compare register 60
CR60
√
FF0DH
8-bit compare register 50
CR50
CR6
Note 2
W
√
√Notes 3, 4
Undefined
FF0EH
8-bit timer counter 60
TM60
√
FF0FH
8-bit timer counter 50
TM50
TM6
Note 2
R
√
√Notes 3, 4
00H
Transmit shift register 20
TXS20
W
√
FFH
FF10H
Receive buffer register 20
RXB20
SIO20
R
√
Undefined
FF14H
FF15H
A/D conversion result register 0
ADCR0
Note 5
R
√
√Notes3
0000H
FF16H
FF17H
16-bit compare register 90
CR90
Note 2
W
√Notes 3, 4
FFFFH
FF18H
FF19H
16-bit timer counter 90
TM90
Note 2
√Notes 3, 4
0000H
FF1AH
16-bit capture register 90
FF1BH
TCP90
Note 2
R
√Note3
Undefined
FF20H
Port mode register 0
PM0
√√
FF21H
Port mode register 1
PM1
√√
FF22H
Port mode register 2
PM2
√√
FF23H
Port mode register 3
PM3
√√
FF25H
Port mode register 5
PM5
R/W
√√
FFH
Notes 1.
PD789426 and 789436 Subseries only.
2. Name of SFR dedicated for 16-bit access.
3. Only in short direct addressing, 16-bit access is possible.
4. These are 16-bit access dedicated registers, however, 8-bit access is possible. When performing 8-bit
access, access using direct addressing.
5. When used as an 8-bit A/D converter (
PD789426 and 789446 Subseries), only 8-bit access is
possible. In this case, the address is FF15H.
When used as a 10-bit A/D converter (
PD789436 and 789456 Subseries), only 16-bit access is
possible. When the
PD78F9436, a flash memory version of the PD789425 or PD789426, is used,
this register can be accessed in 8-bit units.
However, only an object file assembled with the
PD789425 or PD789426 can be used. The same is also true for the PD78F9456, a flash memory
version of the
PD789445 or PD789446: this register can be accessed in 8-bit units, but only an
object file assembled with the
PD789445 or PD789446 can be used.