M38042FEHKP datasheet(35/116 Pages) RENESAS

35 / 116 page

Rev.1.01

Jan 25, 2005

page 35 of 114

REJ03B0131-0101Z

3804 Group (Spec. H)

Fig. 25 Structure of timer Z mode register

Timer Z mode register

(TZM : address 002A16)

Timer Z operating mode bits

b2b1b0

00 0 : Timer/Event counter mode

00 1 : Pulse output mode

01 0 : Pulse period measurement mode

01 1 : Pulse width measurement mode

10 0 : Programmable waveform generating mode

10 1 : Programmable one-shot generating mode

11 0 : Not available

11 1 : Not available

Timer Z write control bit

0 : Writing data to both latch and timer simultaneously

1 : Writing data only to latch

Output level latch

0 : “L” output

1 : “H” output

CNTR2 active edge switch bit

0 : •Event counter mode: Count at rising edge

•Pulse output mode: Start outputting “H”

•Pulse period measurement mode: Measurement

between two falling edges

•Pulse width measurement mode: Measurement of

“H” term

•Programmable one-shot generating mode: After

start outputting “L”, “H” one-shot pulse generated

•Interrupt at falling edge

1 : •Event counter mode: Count at falling edge

•Pulse output mode: Start outputting “L”

•Pulse period measurement mode: Measurement

between two rising edges

•Pulse width measurement mode: Measurement of

“L” term

•Programmable one-shot generating mode: After

start outputting “H”, “L” one-shot pulse generated

•Interrupt at rising edge

Timer Z count stop bit

0 : Count start

1 : Count stop

Timer/Event counter mode switch bit (Note)

0 : Timer mode

1 : Event counter mode

Note: When selecting the modes except the timer/event

counter mode, set “0” to this bit.

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