HD6432351 datasheet(478/1025 Pages) RENESAS

478 / 1025 page

Section 10 16-Bit Timer Pulse Unit (TPU)

Rev. 3.00 Sep 15, 2006 page 444 of 988

REJ09B0330-0300

Bit 7—Count Direction Flag (TCFD): Status flag that shows the direction in which TCNT

counts in channels 1, 2, 4, and 5.

In channels 0 and 3, bit 7 is reserved. It is always read as 1 and cannot be modified.

Bit 7

TCFD

Description

TCNT counts down

TCNT counts up

(Initial value)

Bit 6—Reserved: Read-only bit, always read as 1.

Bit 5—Underflow Flag (TCFU): Status flag that indicates that TCNT underflow has occurred

when channels 1, 2, 4, and 5 are set to phase counting mode.

In channels 0 and 3, bit 5 is reserved. It is always read as 0 and cannot be modified.

Bit 5

TCFU

Description

[Clearing condition]

(Initial value)

When 0 is written to TCFU after reading TCFU = 1

[Setting condition]

When the TCNT value underflows (changes from H'0000 to H'FFFF)

Bit 4—Overflow Flag (TCFV): Status flag that indicates that TCNT overflow has occurred.

Bit 4

TCFV

Description

[Clearing condition]

(Initial value)

When 0 is written to TCFV after reading TCFV = 1

[Setting condition]

When the TCNT value overflows (changes from H'FFFF to H'0000 )

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