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UPD17P136ACT Datasheet(PDF) 161 Page - NEC

Part # UPD17P136ACT
Description  4-BIT SINGLE-CHIP MICROCONTROLLER
PDF  292 Pages
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Manufacturer  NEC [NEC]
Direct Link  http://www.nec.com/
Logo NEC - NEC

UPD17P136ACT Datasheet(HTML) 161 Page - NEC

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CHAPTER 13 PERIPHERAL HARDWARE
142
Figure 13-22. Block Diagram of the Serial Interface
Note The output latch of the shift register is shared with P0D1. If an output instruction is executed to P0D1,
therefore, the status of the output latch of the shift register is accordingly changed.
Shift register (SIOSFR)
P0D2/SI
P0D1/SO
P0D0/SCK
SIOEN
P0DBIO0
P0DBIO1
Q
S
R
Output
latch
SIOTS
SIOHIZ
SIOCK1
SIOCK0
Single
shot
Clear
Serial clock counter
IRQSIO
clear signal
IRQSIO
set signal
P0D0
output
latch
Selector
Note
Clear
Carry
MSB
LSB



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