參數(shù)資料
型號： UPD75512GFA
廠商： NEC Corp.
英文描述： 4-BIT SINGLE-CHIP MICROCOMPUTER
中文描述： 4位單片機
文件頁數(shù)： 15/64頁
文件大?。?/td> 494K
代理商： UPD75512GFA
μ
PD75512(A)
15
3.5 MASK OPTION SELECTION
The following mask options are provided with the pins.
(1)
Pull-up/pull-down resistor selection
Table 3-2 Pull-up/Pull-down Resistor Selection
Pins
Mask Option
P40-P43
(1) With pull-up resistor
(2) Without pull-up resistor
P50-P53
(Can be specified in bit units)
(Can be specified in bit units)
P120-P123
P130-P133
P140-P143
P90-P93
(1) With pull-down resistor
(2) Without pull-down resistor
(Can be specified in bit units)
(Can be specified in bit units)
(2)
Feedback resistor selection for the subsystem clock oscillation
Table 3-3 Feedback Resistor Selection
Pins
Mask Option
XT1, XT2
(1) With feedback resistor
(When the subsystem clock
is used)
(2) Without feedback resistor
(When the subsystem clock
is not used)
Note
:
The operation is not affected if the feedback resistor is selected when the subsystem
clock is not used. However, the supply current I
DD
is increased.
#
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