M38B53M4-059FP datasheet(117/355 Pages) MITSUBISHI

117 / 355 page

38B5 Group User’s Manual

APPLICATION

2-29

2.2 Timer

Fig. 2.2.26 Relevant registers setting

TXM2

T20

INTEDGE

T12M

TXM1

ICON1

IREQ1

TXL

FF16

TXH

FF16

P6D

P61/CNTR0/CNTR2: Input mode

Real time port function (P85): Invalid

Real time port function (P86): Invalid

Timer X mode register 2 (address 2F16)

Port P6 direction register (address 0D16)

Timer X mode register 1 (address 2E16)

Write value in latch and counter

Timer X count source: f(XIN)/64

Timer X operating mode: Pulse width measurement mode

CNTR2 active edge: Measuring “H” pulse width in pulse width measurement mode

Timer X count: Stop; Clear to “0” when starting count.

Timer 2 count: Stop

Timer 2 count source: External count input CNTR0

Set “65535 (FFFF16)” before stat of pulse width

measurement.

Timer X (low-order) (address 2C16)

Timer X (high-order) (address 2D16)

Interrupt edge selection register (address 3A16)

CNTR0 pin edge: Falling edge count

Timer 12 mode register (address 2816)

Timer 2 (address 2116)

Set “0”.

Timer 2 interrupt request occurs due to falling edge input to CNTR0 pin.

Interrupt control register 1 (address 3E16)

Timer X interrupt: Enabled

Timer 2 interrupt: Enabled

Interrupt request register 1 (address 3C16)

Timer X interrupt request (becomes “1” when Timer X underflows)

Timer 2 interrupt request (becomes “1” when “H” level input ends)

M38B53M4-059FP Datasheet(PDF) 117 Page - Mitsubishi Electric Semiconductor

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