UPD17708 datasheet(180/356 Pages) NEC

No. de pieza	UPD17708

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

PDF	356 Pages

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Fabricante Electrónico	NEC [NEC]

Página de inicio	http://www.nec.com/

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180 / 356 page

µPD17704, 17705, 17707, 17708, 17709

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13.5.2 Clock selection and start/stop control blocks

The clock selection block selects a basic clock to operate timer 2 counter.

Four types of basic clocks can be selected by using the TM2CK1 and TM2CK0 flags.

The start/stop block starts or stops the basic clock input to timer 2 by using the TM2EN flag.

Figure 13-22 shows the configuration and function of each flag.

13.5.3 Count block

The count block counts the basic clock with timer 2 counter, reads the count value, and issues an interrupt

request when its count value coincides with the value of the timer 2 modulo register.

The timer 2 counter can be reset by the TM2RES flag.

The timer 2 counter is automatically reset when its value coincides with the value of the timer 2 modulo

The value of the timer 2 counter can be read via data buffer.

Data can be written to the value of the timer 2 modulo register via data buffer.

Figure 13-22 shows the configuration of timer 2 counter clock selection register.

Figure 13-23 shows the configuration of the timer 2 counter.

Figure 13-24 shows the configuration of the timer 2 modulo register.

UPD17708 Datasheet(PDF) 180 Page - NEC