參數(shù)資料
型號(hào)： μPD789217Y
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）
文件頁數(shù)： 20/144頁
文件大?。?/td> 632K
代理商： ΜPD789217Y
Preliminary Product Information
20
μ
PD789216Y, 789217Y
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 (1/3)
Number of bits manipulated simultaneously
Address Special function register (SFR) name
Symbol
R/W
1 bit
8 bits
16 bits
When reset
FF00H
Port 0
P0
R/W
Ο
Ο
00H
FF01H
Port 1
P1
Ο
Ο
FF02H
Port 2
P2
Ο
Ο
FF03H
Port 3
P3
Ο
Ο
FF05H
Port 5
P5
Ο
Ο
FF06H
Port 6
P6
R
Ο
Ο
FF10H
MUL0L
R
Ο
Note 2
Ο
Note 3
Undefined
FF11H
16-bit multiplication result storage
register 0
MUL0H
Note 1
MUL0
FF14H
ADCR0
R
Ο
FF15H
A/D conversion result register 0
FF16H
CR90L
W
Ο
Note 2
Ο
Note 3
FFFFH
FF17H
16-bit compare register 90
CR90H
Note 1
CR90
FF18H
TM90L
R
Ο
Note 2
Ο
Note 3
0000H
FF19H
16-bit timer register 90
TM90H
Note 1
TM90
FF1AH
TCP90L
Ο
Note 2
Ο
Note 3
Undefined
FF1BH
16-bit capture register 90
TCP90H
Note 1
TCP90
FF20H
Port mode register 0
PM0
R/W
Ο
Ο
FFH
FF21H
Port mode register 1
PM1
Ο
Ο
FF22H
Port mode register 2
PM2
Ο
Ο
FF23H
Port mode register 3
PM3
Ο
Ο
FF25H
Port mode register 5
PM5
Ο
Ο
FF32H
Pull-up resistor option register B2
PUB2
Ο
Ο
00H
FF33H
Pull-up resistor option register B3
PUB3
Ο
Ο
FF42H
Timer clock selection register 2
TCL2
Ο
Ο
Notes 1.
MUL0, CR90, TM90, and TCP90 are those SFR symbols used only in 16-bit access mode.
2.
MUL0, CR90, TM90, and TCP90 are designed only for 16-bit access. With direct addressing, however,
they can also be accessed in 8-bit mode.
3.
16-bit access is allowed only with short direct addressing.
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