SH7014 datasheet(254/754 Pages) RENESAS

254 / 754 page

10. Multifunction Timer Pulse Unit (MTU)

Rev.5.00 Sep. 27, 2007 Page 220 of 716

REJ09B0398-0500

Bit 0

⎯Input Capture/Output Compare Flag A (TGFA): This status flag indicates the

occurrence of a TGRA register input capture or compare-match.

Bit 0

TGFA

Description

Clear condition: With TGFA = 1, a 0 write to TGFA following a read

(Cleared by DMAC transfer due to TGFA)

(initial value)

Set conditions:

• When TGRA is functioning as an output compare register

(TCNT = TGRA)

• When TGRA is functioning as input capture (the TCNT value is sent

to TGRA by the input capture signal)

10.2.6

Timer Counters (TCNT)

The timer counters (TCNT) are 16-bit counters, with one for each channel, for a total of three.

The TCNT are initialized to H'0000 by a power-on reset and when in standby mode. Accessing the

TCNT counters in 8-bit units is prohibited. Always access in 16-bit units.

Channel Abbreviation

Function

TCNT0

Increment counter

TCNT1

Increment/decrement counter*

TCNT2

Increment/decrement counter*

Note:

Can only be used as an increment/decrement counter in phase counting mode, with

other channel overflow/underflow counting. It becomes an increment counter in all other

cases.

Bit:

Initial value:

R/W:

R/W

Bit:

Initial value:

R/W:

R/W

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