參數(shù)資料
型號(hào): μPD789417
廠商: NEC Corp.
英文描述: 8 Bit Single Chip Microcontrollers(8位單片微控制器)
中文描述: 8位單片機(jī)微控制器(8位單片微控制器)
文件頁(yè)數(shù): 21/126頁(yè)
文件大小: 590K
代理商: ΜPD789417
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21
μ
PD789415, 789416, 789417
4.3.3 Special function registers (SFRs)
The SFRs are used as peripheral hardware mode registers and control registers. They are mapped in a 256-byte
space, from FF00H to FFFFH.
Table 4-1. Special Function Registers (1/2)
Number of bits manipulated simultaneously
1 bit
8 bits
16 bits
FF00H
Port 0
P0
R/W
00H
FF02H
Port 2
P2
FF04H
Port 4
P4
FF05H
Port 5
P5
FF06H
Port 6
P6
R
FF08H
Port 8
P8
R/W
FF09H
Port 9
P9
FF10H
Transmission shift register
TXS
SIO0
W
FFH
Reception buffer register
RXB
R
Undefined
FF14H
10-bit A/D conversion result register
ADCR
R/W
FF15H
FF16H
16-bit compare register 5
CR50L
CR50
W
FFFFH
FF17H
CR50H
FF18H
16-bit timer register 5
TM5
R
0000H
FF19H
FF1AH
16-bit capture register 5
TCP5
Undefined
FF1BH
FF20H
Port mode register 0
PM0
R/W
FFH
FF22H
Port mode register 2
PM2
FF24H
Port mode register 4
PM4
FF25H
Port mode register 5
PM5
FF28H
Port mode register 8
PM8
FF29H
Port mode register 9
PM9
FF42H
Timer clock selection register 2
TCL2
00H
FF48H
16-bit timer mode control register 5
TMC5
FF4AH
Clock timer mode control register
WTM
FF4EH
Comparator mode register 0
CMPRM0
FF50H
8-bit compare register 0
CR00
W
Undefined
FF51H
8-bit timer register 0
TM0
R
00H
FF53H
8-bit timer mode control register 0
TMC0
R/W
FF54H
8-bit compare register 1
CR10
W
Undefined
FF55H
8-bit timer register 1
TM1
R
00H
Notes 1.
When read with an 8-bit memory manipulation instruction, the eight high-order bits of the 10-bit
conversion result are read.
2.
CR50, TM5, and TCP5 are designed for 16-bit access. They can also be accessed in 8-bit mode,
however. In 8-bit access mode, use direct addressing.
3.
16-bit access is allowed only with short direct addressing.
When reset
R/W
Symbol
Special function register (SFR)
name
Address
Note 1
Note 3
Note 3
Note 2
Note 2
Note 3
Note 3
Note 2
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