uPD4990A
Abstract: PD4990A
Text: DATA SHEET NEC MOS INTEGRATED CIRCUIT juPD4990A SERIAL I/O CALENDAR & CLOCK CMOS LSI The /¿PD4990A is a CM OS LSI developed to input/output calendar & clock data serially to/from the micro computer. The crystal frequency is 32.768 kHz and the data items included are tim e, minute, second, year, month, day, and
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uPD4990A
PD4990A
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Untitled
Abstract: No abstract text available
Text: NEC //PD4990A S E R IA L I/O C A L E N D A R & C LO C K C M O S LS I DESCRIPTION The ¿xPD4990AC, ¿tPD4990AG are a CMOS LS I c h ip developed to in p u t/o u tp u t calendar c lo c k deta seri a lly t o /f r o m th e m icro com puter. The crystal frequency is 3 2 .7 6 8 kH z and the data item s included are a bo ut tim e , m in u te , second, year, m o n th
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uPD4990A
xPD4990AC,
tPD4990AG
PD4990AC)
/1PD4990AG
PD499QA
juPD4990A
14PIN
-100-300A
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D1990a
Abstract: PPD4990AC
Text: DATA SHEET SEC MOS INTEGRATED CIRCUtT ELECTRON DEVICE /¿PD4990A SERIAL I/O CALENDAR & CLOCK C M O S LSI The /xPD4990A is a CM OS LSI developed to input/output calendar & clock data serially to /fro m the micro com puter. The crystal frequency ¡5 3 2.768 kH z and the data items included are tim e, minute, second, year, m onth, day,
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uPD4990A
/xPD4990A
16PIN
PD4990A
016-o
1C--1755
1989P
D1990a
PPD4990AC
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D4990A
Abstract: D4990 TP4096 what is 74LS07 87AD MCOM-75X
Text: S E R I A L I/O R E A L T IM E C L O C K 1C /¿P D 4 9 9 0 A U S E R ’S M A N U A L 4 NEC Corporation tëC Corporation 198B 27 9 CHAPTER 1 INTRODUCTION The jiPD4990A is a CMOS LSI developed to input/output calendar and clock data serially to /from the
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uPD4990A
jiPD4990A
pPD4990A
D4990A
D4990
TP4096
what is 74LS07
87AD
MCOM-75X
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