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UPD17068 Datasheet(PDF) 91 Page - NEC

Part # UPD17068
Description  4-BIT SINGLE-CHIP MICROCONTROLLER CONTAINING IMAGE DISPLAY CONTROLLER AND PLL FREQUENCY SYNTHESIZER FOR DIGITAL TUNING SYSTEMS
PDF  341 Pages
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Manufacturer  NEC [NEC]
Direct Link  http://www.nec.com/
Logo NEC - NEC

UPD17068 Datasheet(HTML) 91 Page - NEC

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91
µPD17068
(3) P0A (P0A1, P0A0)
VDD
RES Signal
Output
latch
Port register
(1 bit)
I/O switching flag
Read instruction
Write instruction
(4) P0B3/HSCNT
VDD
VDD
Output
latch
0
1
Port register
(1 bit)
I/O switching flag
Write instruction
Read instruction
Read instruction (The level is usually low. It is driven high only when a
read instruction is executed.)
Horizontal synchronizing signal counter



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