SH7014 datasheet(256/754 Pages) RENESAS

256 / 754 page

10. Multifunction Timer Pulse Unit (MTU)

Rev.5.00 Sep. 27, 2007 Page 222 of 716

REJ09B0398-0500

Bits 2 to 0

⎯Counter Start 4 to 0 (CST4 to CST0): Select the start and stop of the timer counters

(TCNT). The counter start to channel and bit to channel correspondence are indicated in the tables

below.

Counter Start

Channel

CST2

Channel 2 (TCNT2)

CST1

Channel 1 (TCNT1)

CST0

Channel 0 (TCNT0)

Bit n

CSTn

Description

TCNTn count is halted

(initial value)

TCNTn counts

Note:

n = 2 to 0.

If 0 is written to the CST bit during operation with the TIOC pin in output status, the counter

stops, but the TIOC pin output compare output level is maintained. If a write is done to the

TIOR register while the CST bit is a 0, the pin output level is updated to the established

initial output value.

Bits 7 to 3

⎯Reserved: These bits always read as 0. The write value should always be 0.

10.2.9

Timer Synchro Register (TSYR)

The timer synchro register (TSYR) is an 8-bit read/write register that selects independent or

synchronous TCNT counter operation for channels 0 to 2. Channels for which 1 is set in the

corresponding bit will be synchronized. TSYR is initialized to H'00 upon power-on reset or

standby mode.

Bit:

⎯

SYNC2

SYNC1

SYNC0

Initial value:

R/W:

R/W

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