參數(shù)資料
型號(hào): HD40L4816
廠商: Hitachi,Ltd.
英文描述: 4-Bit Single-Chip Microcomputer(4位單片微計(jì)算機(jī))
中文描述: 4位單片機(jī)(4位單片微計(jì)算機(jī))
文件頁(yè)數(shù): 45/98頁(yè)
文件大小: 621K
代理商: HD40L4816
HD404818 Series
45
Table 20 Input/Output by Program Control
PMRB Bit 3
0
1
DCR
0
1
0
1
PDR
0
1
0
1
0
1
0
1
PMOS (A)
On
On
NMOS (B)
On
On
Pull-up MOS
Notes: — indicates off status.
1. Combine the values of the above mode registers (PMRB3, DCR, and PDR) to select the
input/output for PMOS (A), NMOS (B), and the pull-up MOS, individually.
The DCR and PDR control each pin. Also, PMRB3 controls the on/off of all pull-up MOSs.
2. The second bit of the miscellaneous register (MIS2) controls R0
2
/SO. When MIS2 is 1, PMOS
(A) is off.
R0
/SO
PMOS (A)
On
On
MIS2
0
On
1
Off
3. Each bit of DCR corresponds to each port as follows:
Bit 3
DCR
Bit 2
Bit 1
Bit 0
DCR0
R0
3
R1
3
R2
3
R3
3
D
3
D
7
R0
2
R1
2
R2
2
R3
2
D
2
D
6
R0
1
R1
1
R2
1
R3
1
D
1
D
5
D
9
R0
0
R1
0
R2
2
R3
0
D
0
D
4
D
8
DCR1
DCR2
DCR3
DCRB
DCRC
DCRD
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