R8C2K datasheet(259/471 Pages) RENESAS

259 / 471 page

R8C/2K Group, R8C/2L Group

16. Timers

Rev.1.10

Dec 21, 2007

Page 242 of 450

REJ09B0406-0110

i = 0 or 1, j = either A, B, C, or D

Table 16.39

Output Compare Function Specifications

Item

Specification

Count sources

f1, f2, f4, f8, f32, fOCO40M

External signal input to the TRDCLK pin (valid edge selected by a program)

Count operations

Increment

Count period

• When bits CCLR2 to CCLR0 in the TRDCRi register are set to 000b (free-running

operation)

1/fk × 65536 fk: Frequency of count source

• Bits CCLR1 to CCLR0 in the TRDCRi register are set to 01b or 10b (set the TRDi

Frequency of count source x (n+1)

n: Setting value in the TRDGRji register

Waveform output timing

Compare match

Count start condition

1 (count starts) is written to the TSTARTi bit in the TRDSTR register.

Count stop conditions

• 0 (count stops) is written to the TSTARTi bit in the TRDSTR register when the

CSELi bit in the TRDSTR register is set to 1.

The output compare output pin holds output level before the count stops.

• When the CSELi bit in the TRDSTR register is set to 0, the count stops at the

compare match in the TRDGRAi register.

The output compare output pin holds level after output change by the compare

match.

Interrupt request generation

timing

• Compare match (content of the TRDi register matches content of the TRDGRji

• TRDi register overflows

TRDIOA0 pin function

Programmable I/O port, output-compare output, or TRDCLK (external clock) input

TRDIOB0, TRDIOC0,

TRDIOD0, TRDIOA1 to

TRDIOD1 pin functions

Programmable I/O port or output-compare output (Selectable by pin)

INT0 pin function

Programmable I/O port, pulse output forced cutoff signal input, or INT0 interrupt input

Read from timer

The count value can be read by reading the TRDi register.

Write to timer

• When the SYNC bit in the TRDMR register is set to 0 (channels 0 and 1 operate

independently).

Data can be written to the TRDi register.

• When the SYNC bit in the TRDMR register is set to 1 (channels 0 and 1 operate

synchronously).

Data can be written to both the TRD0 and TRD1 registers by writing to the TRDi

Select functions

• Output-compare output pin selected

Either 1 pin or multiple pins among TRDIOAi, TRDIOBi, TRDIOCi, or TRDIODi.

• Output level at the compare match selected

“L” output, “H” output, or output level inversed

• Initial output level selected

Set the level at period from the count start to the compare match.

• Timing to set the TRDi register to 0000h

Overflow or compare match in the TRDGRAi register

• Buffer operation (Refer to 16.4.2 Buffer Operation.)

• Synchronous operation (Refer to 16.4.3 Synchronous Operation.)

• Output pin in registers TRDGRCi and TRDGRDi changed

The TRDGRCi register can be used as output control of the TRDIOAi pin and the

TRDGRDi register can be used as output control of the TRDIOBi pin.

• Pulse output forced cutoff signal input (Refer to 16.4.4 Pulse Output Forced

Cutoff.

)

• Timer RD can be used as the internal timer without output.

R8C2K датащи(PDF) 259 Page - Renesas Technology Corp

R8C2K датащи(HTML) 259 Page - Renesas Technology Corp

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

датащи скачать

ссылки URL