參數(shù)資料
型號(hào): HD404326
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): 40/94頁
文件大?。?/td> 573K
代理商: HD404326
HD404328 Series
40
Input/Output
The MCU has 2 input pins and 33 input/output pins, 8 of the input/output pins being large-current pins (15
mA, max.). A program-controlled pull-up MOS transistor is provided for each input/output pin.
The output buffer is turned on and off by the data control register (DCR) during input through an
input/output pin.
I/O pin circuit types are shown in table 22.
Table 22
Circuit Configurations of I/O Pins
INT
1
I/O Pin Type
Common I/O
Pin (with
pull-up MOS
transistor)
Circuit
Applicable Pins
Output Pin
(with pull-up
MOS transistor)
Input Pin
ZCD
SO
BUZZ
R
0
0
–R
0
3
R
1
0
–R
1
3
R
2
0
–R
2
3
R
3
0
–R
3
3
R
4
0
–R
4
3
R
5
0
–R
5
3
D
9
D
10
INT
0
EVENT
SI
Pull-up control signal
Output data
Input data
Input control
V
CC
Pull-up control signal
Output data
SCK
(internal)
Pull-up control signal
Output data
SO or BUZZ
Input control
Input data
AC input signal
External capacitor
SCK
SCK
Note: For details of the R1 /SO pin, refer to note 2 of table 23.
D
0
–D
8
DCR
PDR
DCR
DCR
Zero-crossing
detection circuit
V
CC
V
CC
V
CC
V
CC
V
CC
Pull-up control signal
PDR
V
CC
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