
364
Bit 6—Reserved: Read-only bit, always read as 1 and cannot be modified.
Bit 5—Underflow Flag (TCFU): Status flag that indicates that TCNT underflow has occurred
when channels 1and 2 are set to phase counting mode.
In channel 0, bit 5 is reserved. It is always read as 0 and cannot be modified.
Bit 5
TCFU
Description
0
[Clearing condition]
(Initial value)
When 0 is written to TCFU after reading TCFU = 1
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
0
[Clearing condition]
(Initial value)
When 0 is written to TCFV after reading TCFV = 1
1
[Setting condition]
When the TCNT value overflows (changes from H'FFFF to H'0000 )
Bit 3—Input Capture/Output Compare Flag D (TGFD): Status flag that indicates the
occurrence of TGRD input capture or compare match in channel 0.
In channels 1 and 2, bit 3 is reserved. It is always read as 0 and cannot be modified.
Bit 3
TGFD
Description
0
[Clearing conditions]
(Initial value)
When DTC is activated by TGID interrupt while DISEL bit of MRB in DTC is 0
When 0 is written to TGFD after reading TGFD = 1
1
[Setting conditions]
When TCNT = TGRD while TGRD is functioning as output compare register
When TCNT value is transferred to TGRD by input capture signal while TGRD is
functioning as input capture register
Bit 2—Input Capture/Output Compare Flag C (TGFC): Status flag that indicates the
occurrence of TGRC input capture or compare match in channel 0.