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CHAPTER 3 CPU ARCHITECTURE
Table 3-6. Special Function Registers (SFRs) List (4/5)
Address
Note 1
Special Function Register (SFR) Name
Symbol
R/W
Bit Units for Manipulation
On Reset
1 bit
8 bits
16 bits
0FF8CH
Serial receive buffer: UART0
RXB
R
–
–
Undefined
Serial transmit shift register: UART0
TXS
W
–
–
Serial shift register: IOE1
SIO1
R/W
–
–
0FF8DH
Serial receive buffer: UART2
RXB2
R
–
–
Serial transmit shift register: UART2
TXS2
W
–
–
Serial shift register: IOE2
SIO2
R/W
–
–
0FF90H
Baud rate generator control register
BRGC
–
–
00H
0FF91H
Baud rate generator control register 2
BRGC2
–
–
0FFA8H
In-service priority register
ISPR
R
–
0FFAAH
Interrupt mode control register
IMC
R/W
–
80H
0FFACH
Interrupt mask register 0L
MK0L
–
FFH
0FFACH
Interrupt mask register 0
MK0
–
–
FFFFH
0FFADH
0FFADH
Interrupt mask register 0H
MK0H
–
FFH
0FFAEH
Interrupt mask register 1L
MK1L
–
0FFAEH
Interrupt mask register 1
MK1
–
–
FFFFH
0FFAFH
0FFAFH
Interrupt mask register 1H
MK1H
–
FFH
0FFC0H
Standby control register
Note 2
STBC
–
–
30H
0FFC2H
Watchdog timer mode register
Note 2
WDM
–
–
00H
0FFC4H
Memory expansion mode register
MM
–
20H
0FFC7H
Programmable wait control register 1
PWC1
–
–
AAH
0FFC8H
Programmable wait control register 2
PWC2
–
–
AAAAH
0FFC9H
0FFCAH
Bus width specification register
BW
–
–
Note 3
0FFCBH
0FFCFH
Oscillation stabilization time specification register
OSTS
–
–
00H
0FFD0H-
0FFDFH
External SFR area
–
–
Undefined
0FFE0H
Interrupt control register (INTOV0)
OVIC0
–
43H
0FFE1H
Interrupt control register (INTOV1)
OVIC1
–
0FFE2H
Interrupt control register (INTOV4)
OVIC4
–
0FFE3H
Interrupt control register (INTP0)
PIC0
–
0FFE4H
Interrupt control register (INTP1)
PIC1
–
0FFE5H
Interrupt control register (INTP2)
PIC2
–
Notes 1.
When the LOCATION 0 instruction is executed. Add “F0000H” to this value when the LOCATION 0FH
instruction is executed.
2.
These registers can be written only by using dedicated instructions MOV STBC, #byte and MOV WDM,
#byte, and cannot be written by any other instructions.
3.
The value of this register on reset differs depending on the setting of the BWD pin.
BWD = 0: 0000H
BWD = 1: 00FFH