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HT9480 Datasheet(PDF) 27 Page - Holtek Semiconductor Inc

Part # HT9480
Description  Pager Controller
PDF  57 Pages
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Manufacturer  HOLTEK [Holtek Semiconductor Inc]
Direct Link  http://www.holtek.com
Logo HOLTEK - Holtek Semiconductor Inc

HT9480 Datasheet(HTML) 27 Page - Holtek Semiconductor Inc

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Numeric message data transfer
Message data transfer
The decoder outputs a deformatted address
word and message words upon receipt of a valid
call. The message data to be transferred is or-
ganized into 8-bit words and transferred
through the parallel pager data address (1FH)
byte by byte. When a call word starts, the de-
coder generates a data ready interrupt simulta-
neously and runs the processing subroutine.
The subroutine should read out the word in the
pager data address (1FH) before the next call
word comes in, i.e., the word should be read in
4mS at 512/1200 bit data rate and in 2mS at a
2400 bit data rate. Otherwise, the data in 1FH
is overridden by the next word.
HT9480
27
23th Feb ’98



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