參數(shù)資料
型號: μPD789415
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位單片機微控制器(8位單片微控制器)
文件頁數(shù): 14/126頁
文件大?。?/td> 590K
代理商: ΜPD789415
14
μ
PD789415, 789416, 789417
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-H
I/O
Separately connected to V
DD0
, V
DD1
, V
SS0
, or V
SS1
via respective resistors
P20/SCK/ASCK
8-C
P21/SO/TxD
P22/SI/RxD
P23/CMPTOUT0/TO2
10-B
P24/INTP0/TI0
8-C
P25/INTP1/TI1
P26/INTP2/TO5
P27/INTP3/CPT5
P40/KR0-P45/KR5
P46, P47
5-H
P50-P53
13-Q
P60/ANI0/CMPIN0
9-D
Input
P61/ANI1/CMPREF0
P62/ANI2-P66/ANI6
9-C
P80/S27-P87/S20
17-F
I/O
P90/S19-P93/S16
S0-S15
17-B
Output
Open
COM0-COM3
18-A
V
LC0
-V
LC2
BIAS
Open (alternatively, connected to V
SS0
or V
SS1
via a resistor independently
of the other pins, when none of V
LC0
to V
LC2
are used, however)
XT1
Input
Connected to V
SS0
or V
SS1
, via a resistor, independently of the other pins
XT2
Open
RESET
2
Input
IC
Connected directly to V
SS0
or V
SS1
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