Datasheet

Section 13 Timer RC

Rev. 1.50 Sep. 18, 2007 Page 238 of 584

REJ09B0240-0150

• FTIOD pin

Name TRCOER TRCMR TRCIOR1

Bit Name ED PWM2 PWMD

IOD2 to

IOD0

Function

0 1 1 XXX PWM mode waveform output

0 1 0 001, 01X Timer mode waveform output (output

compare function)

1 0 1XX Timer mode (input capture function)

Setting

values

Other than above General I/O port

[Legend]

X: Don't care.

13.4.1 Timer Mode Operation

TRCCNT performs free-running or periodic counting operations. After a reset, TRCCNT is set as

a free-running counter. When the CTS bit in TRCMR is set to 1, TRCCNT starts counting. When

the TRCCNT value overflows from H'FFFF to H'0000, the OVF flag in TRCSR is set to 1. If the

OVIE in TRCIER is set to 1, an interrupt request is generated. Figure 13.2 shows an example of

free-running counting.

TRCCNT

H'FFFF

H'0000

CTS bit

OVF

Time

Flag cleared

by software

Figure 13.2 Free-Running Counter Operation