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UPD17708 Datasheet(PDF) 231 Page - NEC

Part # UPD17708
Description  4-BIT SINGLE-CHIP MICROCONTROLLERS WITH DEDICATED HARDWARE FOR DIGITAL TUNING SYSTEM
PDF  356 Pages
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Manufacturer  NEC [NEC]
Direct Link  http://www.nec.com/
Logo NEC - NEC

UPD17708 Datasheet(HTML) 231 Page - NEC

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µPD17704, 17705, 17707, 17708, 17709
This is because, even if only the SBACK flag is set, the SIO0NWT flag is also set because it is in the register
at the same address. If the wait status is set at this time, the wait status is released and one pulse of the shift
clock is output.
Figure 16-11. Acknowledge Output and Input Operations
Data input
Data
Hi-Z (D1)
Hi-Z (D0)
SBACK output
Hi-Z
Shift clock
7
8
9
Acknowledge output
At this time, wait status must
be released at the same time.
Data output
Data
D1 output
D0 output
ACK at reception
side
Shift clock
7
8
9
Acknowledge input
(a) During reception
(b) During transmission



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