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UPD178018 Datasheet(PDF) 20 Page - NEC

Part # UPD178018
Description  8-BIT SINGLE-CHIP MICROCONTROLLER
PDF  56 Pages
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Manufacturer  NEC [NEC]
Direct Link  http://www.nec.com/
Logo NEC - NEC

UPD178018 Datasheet(HTML) 20 Page - NEC

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µPD178004, 178006, 178016, 178018
Figure 5-8. Serial Interface Channel 0 Block Diagram
Internal Bus
Interrupt Request
Signal Generator
Handshake
Control
Circuit
Buffer RAM
Serial Clock Control Circuit
Selector
Serial Counter
Serial I/O Shift Register 1 (SIO1)
Automatic Data Transmit/
Receive Address Pointer
(ADTP)
Automatic Data
Transmit/Receive
Interval Specification
Register (ADTI)
5-Bit Counter
INTCSI1
f XX/2-f XX/2
8
SI1/P20
SO1/P21
STB/P23
BUSY/P24
SCK1/P22
Match
Figure 5-9. Serial Interface Channel 1 Block Diagram
Busy/Acknowledge
Output Circuit
Output
Latch
Serial I/O Shift
Register 0 (SIO0)
Internal Bus
Interrupt Request
Signal Generator
Serial Clock Counter
Bus Release/Command/
Acknowledge Detection
Circuit
Serial Clock
Control Circuit
Selector
Selector
Selector
SI0/SB0/SDA0/P25
SO0/SB1/SDA1/P26
SCK0/SCL/P27
INTCSI0
fXX/2-fXX/2
8



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