Section 9 Timers
Rev. 7.00 Mar 10, 2005 page 269 of 652
REJ09B0042-0700
Bit 5—Timer Overflow Interrupt Enable H (OVIEH)
Bit 5 selects enabling or disabling of interrupt generation when TCFH overflows.
Bit 5
OVIEH Description
0 TCFH overflow interrupt request is disabled (initial value)
1 TCFH overflow interrupt request is enabled
Bit 4—Counter Clear H (CCLRH)
In 16-bit mode, bit 4 selects whether TCF is cleared when TCF and OCRF match.
In 8-bit mode, bit 4 selects whether TCFH is cleared when TCFH and OCRFH match.
Bit 4
CCLRH Description
0
16-bit mode: TCF clearing by compare match is disabled
8-bit mode: TCFH clearing by compare match is disabled (initial value)
1
16-bit mode: TCF clearing by compare match is enabled
8-bit mode: TCFH clearing by compare match is enabled
Bit 3—Timer Overflow Flag L (OVFL)
Bit 3 is a status flag indicating that TCFL has overflowed from H'FF to H'00. This flag is set by
hardware and cleared by software. It cannot be set by software.
Bit 3
OVFL Description
0
Clearing condition: (initial value)
After reading OVFL = 1, cleared by writing 0 to OVFL
1
Setting condition:
Set when TCFL overflows from H’FF to H’00
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