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UPD78014 Datasheet(PDF) 21 Page - NEC

Part # UPD78014
Description  8-BIT SINGLE-CHIP MICROCOMPUTER
PDF  62 Pages
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Manufacturer  NEC [NEC]
Direct Link  http://www.nec.com/
Logo NEC - NEC

UPD78014 Datasheet(HTML) 21 Page - NEC

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µPD78001B(A), 78002B(A)
21
5.6
SERIAL INTERFACES
There is one on-chip clocked serial interface.
Serial Interface channel 0 has the following three modes.
• 3-wire serial I/O mode
: MSB/LSB-first switchable
• SBI (Serial Bus Interface) mode
: MSB-first
• 2-wire serial I/O mode
: MSB-first
Fig. 5-7 Serial Interface Channel 0 Block Diagram
Busy/Acknowledge
Output Circuit
Output
Latch
Serial I/O Shift
Register 0 (SIO0)
Internal Bus
Interrupt
Request
Signal
Generator
Serial Counter
Bus Release/Command/
Acknowledge Detection
Circuit
Serial Clock
Control Circuit
Selector
Selector
Selector
fX/2 – fX/2
29
TO2
INTCSI0
SCK0/P27
SO0/SB1/P26
SI0/SB0/P25



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