h8s-2635 Renesas Electronics Corporation., h8s-2635 Datasheet - Page 389

• Manufacturer Part Number: h8s-2635
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
• Manufacturer: Renesas Electronics Corporation.

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 6—Reserved: This bit is always read as 1 and cannot be modified.
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 4—Overflow Flag (TCFV): Status flag that indicates that TCNT overflow has occurred.
Bit 7
TCFD
0
1
Bit 5
TCFU
0
1
Bit 4
TCFV
0
1
Description
Description
Description
TCNT counts down
TCNT counts up
[Clearing condition]
[Setting condition]
[Clearing condition]
[Setting condition]
When 0 is written to TCFU after reading TCFU = 1
When the TCNT value underflows (changes from H'0000 to H'FFFF)
When 0 is written to TCFV after reading TCFV = 1
When the TCNT value overflows (changes from H'FFFF to H'0000 )
Rev. 6.00 Feb 22, 2005 page 329 of 1484
Section 10 16-Bit Timer Pulse Unit (TPU)
REJ09B0103-0600
(Initial value)
(Initial value)
(Initial value)