參數(shù)資料
型號(hào): μPD789134
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): 12/48頁(yè)
文件大?。?/td> 215K
代理商: ΜPD789134
Preliminary Product Information
12
μ
PD789131, 789132, 789134
3.3
Pin Input/Output Circuits and Handling of Unused Pins
Table 3-1 lists the types of input/output circuits for each pin and explains how unused pins are handled.
Figure 3-1 shows the configuration of each type of input/output circuit.
Table 3-1. Type of Input/Output Circuit for Each Pin and Handling of Unused Pins
Pin name
I/O circuit type
I/O
Recommended connection of unused pins
P00-P03
5-A
I/O
Connect these pins to the V
DD
or V
SS
pin through a separate resistor.
P10, P11
P20/SCK20/ASCK20
8-A
P21/SO20/T
X
D20
P22/SI20/R
X
D20
P23/INTP0/CPT20/SS20
Connect these pins to the V
SS
pin through a separate resistor.
P24/INTP1/TO80/TO20
P25/INTP2/TI80
P50-P53
13-W
Connect these pins to the V
DD
pin through a separate resistor.
P60/ANI0-P63/ANI3
9-C
Input
Connect these pins to the V
DD
or V
SS
pin through a separate resistor.
AV
DD
-
-
Connect this pin to the V
DD
pin through a resistor.
AV
SS
-
-
Connect this pin to the V
SS
pin through a resistor.
RESET
2
Input
-
IC
-
-
Connect this pin directly to the V
SS
pin.
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