參數(shù)資料
型號(hào): μPD789012
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): 10/44頁(yè)
文件大?。?/td> 271K
代理商: ΜPD789012
μ
PD789011, 789012
10
3.3 Pin I/O Circuit and Recommended Connections of Unused Pins
Table 3-1 shows the types of the I/O circuits of each pin and the connections for unused pins.
See Figure 3-1 for the structure of each type of I/O circuit.
Table 3-1. Types of Pin I/O Circuits
Pin Name
I/O Circuit Type
I/O
Recommended Connection for Unused Pins
P00-P07
5-A
I/O
Connect to V
DD
or V
SS
via a resistor independently.
P10-P17
P20/ASCK/SCK0
5-D
P21/TxD/SO0
5-A
P22/RxD/SI0
5-D
P30/INTP0/TI0/TO0
Connect to V
SS
via a resistor independently.
P31/INTP1/TI1/TO1
P32/INTP2
RESET
2
IC
Connect directly to V
SS
.
Figure 3-1. Summary of the Pin I/O Circuits
Schmitt-Triggered Input with hysteresis characteristics
Type 2
Type 5-A
Type 5-D
IN
V
DD
P-ch
V
DD
P-ch
N-ch
IN/OUT
pullup
enable
data
output
disable
input
enable
V
DD
P-ch
V
DD
P-ch
N-ch
IN/OUT
pullup
enable
data
output
disable
input
enable
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