HD6433935 Hitachi, HD6433935 Datasheet - Page 215

• Manufacturer Part Number: HD6433935
• Description: 8-Bit MICROCONTROLLER
• Manufacturer: Hitachi

4. Timer control/status register F (TCSRF)
Note: * Bits 7, 6, 3, and 2 can only be written with 0, for flag clearing.
TCSRF is an 8-bit read/write register that performs counter clear selection, overflow flag setting,
and compare match flag setting, and controls enabling of overflow interrupt requests.
TCSRF is initialized to H'00 upon reset.
Bit 7: Timer overflow flag H (OVFH)
Bit 7 is a status flag indicating that TCFH 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 7
OVFH
0
1
Bit 6: Compare match flag H (CMFH)
Bit 6 is a status flag indicating that TCFH has matched OCRFH. This flag is set by hardware and
cleared by software. It cannot be set by software.
Bit 6
CMFH
0
1
Bit:
Initial value:
Read/Write:
Description
Clearing conditions:
After reading OVFH = 1, cleared by writing 0 to OVFH
Setting conditions:
Set when TCFH overflows from H'FF to H'00
Description
Clearing conditions:
After reading CMFH = 1, cleared by writing 0 to CMFH
Setting conditions:
Set when the TCFH value matches the OCRFH value
R/(W) *
OVFH
7
0
R/(W) *
CMFH
6
0
OVIEH
R/W
5
0
CCLRH
R/W
4
0
R/(W) *
OVFL
3
0
R/(W) *
CMFL
2
0
OVIEL
R/W
1
0
(initial value)
(initial value)
CCLRL
R/W
0
0
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