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
√
√
Notes 3
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
√
Note 3
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.
μ
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 (
μ
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 (
μ
PD789436 and 789456 Subseries), only 16-bit access is
possible. When the
μ
PD78F9436, a flash memory version of the
μ
PD789425 or
μ
PD789426, is used,
this register can be accessed in 8-bit units. However, only an object file assembled with the
μ
PD789425 or
μ
PD789426 can be used. The same is also true for the
μ
PD78F9456, a flash memory
version of the
μ
PD789445 or
μ
PD789446: this register can be accessed in 8-bit units, but only an
object file assembled with the
μ
PD789445 or
μ
PD789446 can be used.