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UPD784021 Datasheet(PDF) 75 Page - NEC

Part # UPD784021
Description  16/8-BIT SINGLE-CHIP MICROCOMPUTER
PDF  90 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  NEC [NEC]
Direct Link  http://www.nec.com/
Logo NEC - NEC

UPD784021 Datasheet(HTML) 75 Page - NEC

Back Button UPD784021 Datasheet HTML 71Page - NEC UPD784021 Datasheet HTML 72Page - NEC UPD784021 Datasheet HTML 73Page - NEC UPD784021 Datasheet HTML 74Page - NEC UPD784021 Datasheet HTML 75Page - NEC UPD784021 Datasheet HTML 76Page - NEC UPD784021 Datasheet HTML 77Page - NEC UPD784021 Datasheet HTML 78Page - NEC UPD784021 Datasheet HTML 79Page - NEC Next Button
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 75 / 90 page
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75
m
m
m
m
mPD784020, 784021
Timing Waveform for Refresh
(1) Random read/write cycle
(2) When a refresh is performed simultaneously with a memory access
(3) Refresh after reading
(4) Refresh after writing
ASTB
WR
RD
tRC
tRC
tRC
tRC
tRC
ASTB
RD, WR
REFRQ
tDSTRFQ
tWRFQL
tWRFQH
tDRFQST
ASTB
RD
REFRQ
tDRFQST
tDRRFQ
tWRFQL
tDRFQST
tDWRFQ
tWRFQL
ASTB
WR
REFRQ



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