R8CSLASH2G datasheet(220/344 Pages) RENESAS

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R8C/2G Group

17. Timers

Rev.1.00

Apr 04, 2008

Page 200 of 318

REJ09B0387-0100

17.4

Timer RF

Timer RF is a 16-bit timer. The count source for timer RF is the operating clock that regulates the timing of timer

operations. Figure 17.45 shows a Block Diagram of Timer RF. Figure 17.46 shows a Block Diagram of CMP

Waveform Generation Unit. Figure 17.47 shows a Block Diagram of CMP Waveform Output Unit.

Timer RF has two modes: input capture mode and output compare mode. Figures 17.48 to 17.51 show the timer RF

associated registers.

Figure 17.45

Block Diagram of Timer RF

TRFM0 register

= 00b

= 01b

= 10b

f32

TCK1 to TCK0

TSTART

CCLR = 1

CCLR = 0

Capture signal

Timer RF

interrupt

Compare 1

interrupt

Timer RF counter

clear signal

TSTART, TCK0 to TCK1: Bits in TRFCR0 register

TIPF0 to TIPF1, CCLR: Bits in TRFCR1 register

TRFC20: Bit in TRFCR2 register

TRFOSEL: Bit in PINSR4 register

Compare 0

interrupt

TRF register

TRFM1 register

Capture interrupt

Capture, Compare 0 register

Counter

Compare 1 register

Comparator

= 01b

= 10b

Digital

filter

= 11b

f32

TIPF1 to TIPF0

= other than

00b

= 00b

TRFI

Sampling clock

TRFC20 = 1

TRFC20 = 0

fC32

Edge

detection

CMP

waveform

generation

unit

TRFO00

TRFO01

TRFO02

TRFO10

TRFO11 (P3_4)

TRFO12

TRFOSEL = 0

TRFOSEL = 1

TRFO11 (P3_7)

CMP waveform

output unit

CMP waveform

output unit

CMP waveform

output unit

CMP waveform

output unit

CMP waveform

output unit

CMP waveform

output unit

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