UPD784020 Datasheet, PDF (26/90 Pages) NEC – 16/8-BIT SINGLE-CHIP MICROCOMPUTER

mPD784020, 784021
Table 7-1 Special Function Registers (SFRs) (3/4)
Address^{Note 1}
Special function register (SFR) name
Abbreviation
0FF84H
0FF85H
0FF86H
0FF88H
0FF89H
0FF8AH
0FF8BH
0FF8CH
0FF8DH
0FF90H
0FF91H
0FFA0H
0FFA1H
0FFA4H
0FFA8H
0FFAAH
0FFACH
0FFADH
0FFAEH
0FFC0H
0FFC2H
0FFC4H
0FFC5H
0FFC6H
0FFC7H
0FFC8H
Synchronous serial interface mode register 1 CSIM1
Synchronous serial interface mode register 2 CSIM2
Serial shift register
SIO
Asynchronous serial interface mode register ASIM
Asynchronous serial interface mode register 2 ASIM2
Asynchronous serial interface status register ASIS
Asynchronous serial interface status register 2 ASIS2
Serial receive buffer: UART0
RXB
Serial transmission shift register: UART0
TXS
Serial shift register: IOE1
SIO1
Serial receive buffer: UART2
RXB2
Serial transmission shift register: UART2
TXS2
Serial shift register: IOE2
SIO2
Baud rate generator control register
BRGC
Baud rate generator control register 2
BRGC2
External interrupt mode register 0
INTM0
External interrupt mode register 1
INTM1
Sampling clock selection register
SCS0
In-service priority register
ISPR
Interrupt mode control register
IMC
Interrupt mask register 0L
MK0L MK0
Interrupt mask register 0H
MK0H
Interrupt mask register 1L
MK1L
Standby control register
STBC
Watchdog timer mode register
WDM
Memory expansion mode register
MM
Hold mode register
HLDM
Clock output mode register
CLOM
Programmable wait control register 1
PWC1
Programmable wait control register 2
PWC2
R/W
R/W
R
W
R/W
R
W
R/W
R
R/W
Manipulatable bits
When reset
1 bit 8 bits 16 bits
l
l
– 00H
l
l
–
–
l
–
l
l
–
l
l
–
l
l
–
l
l
–
–
l
– Undefined
–
l
–
–
l
–
–
l
–
–
l
–
–
l
–
–
l
– 00H
–
l
–
l
l
–
l
l
–
–
l
–
l
l
–
l
l
– 80H
l
l
l FFFFH
l
l
l
l
– FFH
– l^{Note 2} – 30H
– l^{Note 2} –
00H
l
l
– 20H
l
l
– 00H
l
l
–
–
l
– AAH
–
–
l AAAAH
Notes 1. Applicable when the LOCATION 0 instruction is executed. When the LOCATION 0FH instruction is
executed, F0000H is added to each address.
2. A write operation can be performed only with special instructions MOV STBC,#byte and MOV
WDM,#byte. Other instructions cannot perform a write operation.
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