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UPD17708 Datasheet(PDF) 239 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) 239 Page - NEC

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µPD17704, 17705, 17707, 17708, 17709
<3> If forced wait is set after wait status has been released
Figure 16-15. Shift Clock Generation Timing in Serial I/O Mode (4/4)
Wait period
Wait released status
1/fSC
Forced wait by SIO0NWT
ab
Wait released
Wait period
Wait released status
a + b = 1/2fSC
a + b = 1/2fSC
1/fSC
Forced wait by SIO0NWT
ab
Wait released
<4> If wait status is released when it has been already released once
The clock output waveform is not affected. However, note that the clock counter is reset.
(8) Operations of SBSTT and SBBSY flags
The SBSTT and SBBSY flags operate only in the I2C bus mode.
These flags remain “0” in the serial I/O mode.



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