UPD17708 datasheet(250/356 Pages) NEC

No. de pieza	UPD17708

Descripción Electrónicos	4-BIT SINGLE-CHIP MICROCONTROLLERS WITH DEDICATED HARDWARE FOR DIGITAL TUNING SYSTEM

PDF	356 Pages

Scroll/Zoom	100%

Fabricante Electrónico	NEC [NEC]

Página de inicio	http://www.nec.com/

Logo

250 / 356 page

250

µPD17704, 17705, 17707, 17708, 17709

(4) Interrupt request issuance timing

An interrupt request is issued at the rising of the shift clock when the value of the clock counter is “8”.

(5) Shift clock generation timing

(a) On releasing wait status from initial status

The initial status is the status when the P0B2/SCK1 pin is set in the output mode and the internal clock

operation is selected.

In the wait status, a high level is output to the shift clock pin.

The wait status can be released and a clock can be selected at the same time.

Figure 16-20. Shift Clock Generation Timing of Serial Interface 1 (1/4)

1/fSC

Wait status

Shift clock

Wait released

Initialization

1 : 1

(b) When wait operation is performed (normal operation)

<1> If wait status is set at the 8th clock (normal operation)

Figure 16-20. Shift Clock Generation Timing of Serial Interface 1 (2/4)

Shift clock

Wait

Wait release period

Wait period

1/fSC

Wait released

UPD17708 Datasheet(PDF) 250 Page - NEC