參數(shù)資料
型號: μPD70P3000
廠商: NEC Corp.
英文描述: 16/32 Bit Single Chip Microcontrollers(16/32位單片微控制器)
中文描述: 16/32位單片機微控制器(16/32位單片微控制器)
文件頁數(shù): 12/72頁
文件大?。?/td> 334K
代理商: ΜPD70P3000
μ
PD70P3000
12
2.3 I/O Circuits of Pins and Recommended Connections of Unused Pins
Table 2-1 shows the I/O circuit type of each pin in the normal operation mode, and the recommended
connections of the unused pins. Figure 2-1 shows a partially simplified diagram of each circuit.
In the PROM programming mode, process the unused pins by referring to the diagram in PIN CONFIGURA-
TION.
When connecting a pin to V
DD
or V
SS
via resistor, use of a resistor of 3 to 10 k
is recommended.
Table 2-1. I/O Circuit Types of Each Pin and Recommended Connections of Unused Pins
Pin
I/O Circuit Type
Recommended Connections
P00/TO10, P01/TO11
5
Input
: Individually connect to V
DD
or V
SS
via resistor.
P02/TCLR1, P03/TI1
8
Output : Open
P04/INTP10-P07/INTP13
P10-P17
5
P20/NMI
2
Directly connect to V
SS
.
P21/INTP00-P24/INTP03
8
Input
: Individually connect to V
DD
or V
SS
via resistor.
P25
5
Output : Open
P26, P27
8
P30/SO
5
P31/SI, P32/SCK
8
P33/TXD, P34/RXD, P35
5
P36, P37
8
P40/AD0-P47/AD7
5
P50/AD8-P57/AD15
P60/A16-A67/A23
P90/LBEN
P91/UBEN
P92/R/W
P93/DSTB
P94/ASTB
P95/ST0, P96/ST1
P97
P100/HLDAK
P101/HLDRQ
P102
P103
CLKOUT
3
Open
CKSEL
2
WAIT
1
Directly connect to V
DD
.
MODE0, MODE1
2
RESET
IC0
Directly connect to V
SS
.
IC1
Directly connect to V
DD
.
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