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參數(shù)資料
| 型號： | UPD784020 |
| 廠商： | NEC Corp. |
| 英文描述： | 16/8-BIT SINGLE-CHIP MICROCOMPUTER |
| 中文描述： | 16/8-BIT單片機 |
| 文件頁數(shù)： | 26/90頁 |
| 文件大?。?/td> | 614K |
| 代理商： | UPD784020 |
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26
m
PD784020, 784021
Address
Note 1
Special function register (SFR) name
Abbreviation
R/W
Manipulatable bits
When reset
1 bit
8 bits 16 bits
0FF84H
Synchronous serial interface mode register 1
CSIM1
R/W
l
l
–
00H
0FF85H
Synchronous serial interface mode register 2
CSIM2
l
l
–
0FF86H
Serial shift register
SIO
–
l
–
0FF88H
Asynchronous serial interface mode register
ASIM
l
l
–
0FF89H
Asynchronous serial interface mode register 2
ASIM2
l
l
–
0FF8AH
Asynchronous serial interface status register
ASIS
R
l
l
–
0FF8BH
Asynchronous serial interface status register 2
ASIS2
l
l
–
0FF8CH
Serial receive buffer: UART0
RXB
–
l
–
Undefined
Serial transmission shift register: UART0
TXS
W
–
l
–
Serial shift register: IOE1
SIO1
R/W
–
l
–
0FF8DH
Serial receive buffer: UART2
RXB2
R
–
l
–
Serial transmission shift register: UART2
TXS2
W
–
l
–
Serial shift register: IOE2
SIO2
R/W
–
l
–
0FF90H
Baud rate generator control register
BRGC
–
l
–
00H
0FF91H
Baud rate generator control register 2
BRGC2
–
l
–
0FFA0H
External interrupt mode register 0
INTM0
l
l
–
0FFA1H
External interrupt mode register 1
INTM1
l
l
–
0FFA4H
Sampling clock selection register
SCS0
–
l
–
0FFA8H
In-service priority register
ISPR
R
l
l
–
0FFAAH
Interrupt mode control register
IMC
R/W
l
l
–
80H
0FFACH
Interrupt mask register 0L
MK0L MK0
l
l
l
FFFFH
0FFADH
Interrupt mask register 0H
MK0H
l
l
0FFAEH
Interrupt mask register 1L
MK1L
l
l
–
FFH
0FFC0H
Standby control register
STBC
–
l
Note 2
–
30H
0FFC2H
Watchdog timer mode register
WDM
–
l
Note 2
–
00H
0FFC4H
Memory expansion mode register
MM
l
l
–
20H
0FFC5H
Hold mode register
HLDM
l
l
–
00H
0FFC6H
Clock output mode register
CLOM
l
l
–
0FFC7H
Programmable wait control register 1
PWC1
–
l
–
AAH
0FFC8H
Programmable wait control register 2
PWC2
–
–
l
AAAAH
Table 7-1 Special Function Registers (SFRs) (3/4)
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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