SH7721 datasheet(588/1524 Pages) RENESAS

588 / 1524 page

Section 15

16-Bit Timer Pulse Unit (TPU)

Rev. 3.00 Jan. 18, 2008 Page 526 of 1458

REJ09B0033-0300

Bit

Bit Name

Initial

Value R/W

Description

TGFB

R/(W)* Compare Flag B

Status flag that indicates the occurrence of TGRB compare

match.

[Clearing conditions]

When 0 is written to TGFB after reading TGFB = 1

[Setting conditions]

When TCNT = TGRB

TGFA

R/(W)* Output Compare Flag A

Status flag that indicates the occurrence of TGRA compare

match.

[Clearing conditions]

When 0 is written to TGFA after reading TGFA = 1

[Setting conditions]

When TCNT = TGRA

Note:

Only 0 can be written, to clear the flag.

15.3.6

Timer Counters (TCNT)

The TCNT registers are 16-bit readable/writable counters. The TPU has four TCNT counters, one

for each channel.

The TCNT counters are initialized to H'0000 by a reset.

The TCNT counters are not initialized in standby mode, sleep mode, or module standby.

15.3.7

Timer General Registers (TGR)

The TGR registers are 16-bit registers. The TPU has 16 TGR registers, four each for channels 0

and 3. TGRC and TGRD can also be designated for operation as buffer registers*. The TGR

registers are initialized to H'FFFF by a reset. These registers are not initialized in standby mode,

sleep mode, or module standby.

Note: * TGR buffer register combinations are TGRA—TGRC and TGRB—TGRD.

SH7721 Datasheet(PDF) 588 Page - Renesas Technology Corp