參數(shù)資料
型號(hào): HD404324
廠商: Hitachi,Ltd.
英文描述: 4-bit HMCS400-series microcomputer(4位單片微計(jì)算機(jī))
中文描述: 4位HMCS400系列微電腦(4位單片微計(jì)算機(jī))
文件頁數(shù): 44/94頁
文件大小: 573K
代理商: HD404324
HD404328 Series
44
PMRC3
DCR
PDR
Input data
V
CC
V
CC
PMOS (A)
NMOS (B)
Input control
Pull-up
MOS
transistor
Figure 25 I/O Buffer Configuration
Table 23
Programmable I/O Circuits
PMRC, Bit 3
DCR
PDR
CMOS
Buffer
PMOS (A)
NMOS (B)
Pull-Up MOS Transistor
1
0
0
Off
Off
Off
1
Off
Off
Off
Off
On
Off
1
On
Off
Off
0
Off
Off
Off
1
Off
Off
On
0
Off
On
Off
1
On
Off
On
0
0
0
1
1
Notes:
1.
2.
3.
Various I/O methods can be selected by different combinations of settings of the above mode
registers (PMRC3, DCR, PDR).
The PMOS (A) transistor of the R1 /SO pin can be turned off by setting bit 2 of the
miscellaneous register (MIS) to 1.
The relationships between DCRs and pins
are as shown on the right.
MIS
Bit 2
0
1
On
Off
R1 /SO Pin
PMOS (A)
DCR
DCR0
DCR1
DCR2
DCR3
DCR4
DCR5
DCRB
DCRC
DCRD
Bit 3
R0
R1
R2
R3
R4
R5
D
D
Bit 2
Bit 1
Bit 0
3
3
3
3
3
3
3
7
2
2
2
2
2
2
1
1
1
1
1
1
0
0
0
0
0
0
2
6
1
5
0
4
8
R0
R1
R2
R3
R4
R5
R0
R1
R2
R3
R4
R5
D
D
R0
R1
R2
R3
R4
R5
D
D
D
D
D
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