參數(shù)資料
型號: UPD4991AGS
廠商: NEC Corp.
英文描述: 4-BIT PARALLEL I/O CALENDAR CLOCK
中文描述: 4位并行I / O日歷鐘
文件頁數(shù): 20/32頁
文件大?。?/td> 133K
代理商: UPD4991AGS
μ
PD4991A
20
“H”
“L” output
The output signal of TP
1
goes from “H” to “L” when the value of the alarm register coincides with the contents
of the time counter.
Fig. 2 “H”
“L” Output Waveform
Alarm coincidence
Alarm coincidence flag, auto RESET
When the value of the alarm register coincides with the contents of the time counter, a signal is output to the
TP
1
pin.
This signal remains output until the value of the alarm register does not coincide with the time counter contents.
Fig. 3 TP
1
Output Waveform (with AUTO RESET)
2048 Hz
~
1 Hz
1 pulse
Alarm coincidence
Alarm coincidence
"H"
"L"
Alarm coincidence
30.5 s
T
T
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