M37544 Datasheet, PDF(25/68 Page) Renesas Technology Corp – SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

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M37544 Datasheet, PDF (25/68 Pages) Renesas Technology Corp – SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

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7544 Group

Timer X mode register

(TXM : address 002B16, initial value: 0016)

Timer X operating mode bits

b1 b0

0 0 : Timer mode

0 1 : Pulse output mode

1 0 : Event counter mode

1 1 : Pulse width measurement mode

CNTR0 active edge switch bit

0 : Interrupt at falling edge

Count at rising edge

(in event counter mode)

1 : Interrupt at rising edge

Count at falling edge

(in event counter mode)

Timer X count stop bit

0 : Count start

1 : Count stop

P03/TXOUT output valid bit

0 : Output invalid (I/O port)

1 : Output valid (Inverted CNTR0 output)

Disable (return â0â when read)

Fig. 24 Structure of timer X mode register

Timer count source set register 1

(TCSS1 : address 002E16, initial value: 0016)

Timer X count source selection bits

b1 b0

0 0 : f(XIN)/16

0 1 : f(XIN)/2

1 0 : f(XIN) (Note)

1 1 : Not available

Disable (return â0â when read)

Note : f(XIN) can be used as timer X count source when using

a ceramic resonator or on-chip oscillator.

Do not use it at RC oscillation.

Fig. 25 Timer count source set register 1

Rev.1.04 2004.06.08 page 25 of 66

REJ03B0012-0104Z

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