參數(shù)資料
型號(hào): UPD75008
廠商: NEC Corp.
英文描述: 4-BIT SINGLE-CHIP MICROCOMPUTER
中文描述: 4位單片機(jī)
文件頁(yè)數(shù): 14/66頁(yè)
文件大?。?/td> 542K
代理商: UPD75008
μ
PD75004, 75006, 75008
14
3.4
SELECTION OF MASK OPTION
The following mask operations are available and can be specified for each pin.
Table 3-1 Mask Option Selection
Pin
Mask Option
P40-P43,
P50-P53
With pull-up resistor
Without pull-up resistor
*: Mask option can be specified in bit units.
3.5
RECOMMENDED PROCESSING OF UNUSED PINS
Table 3-2 Processing of Unused Pins
Pin
Recommended Connections
P00/INT4
Connect to V
SS
P01/SCK
P02/SO/SB0
Connect to V
SS
or V
DD
P03/SI/SB1
P10/INT0-P12/INT2
P13/TI0
P20/PTO0
P21
P22/PCL
P23/BUZ
P30-P33
Input
: Connect to V
SS
or V
DD
P40-P43
Output: Open
P50-P53
P60-P63
P70-P73
P80-P81
XT1
Connect to V
SS
or V
DD
XT2
Open
Connect to V
SS
#
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