hd64338023s Renesas Electronics Corporation., hd64338023s Datasheet - Page 310

• Manufacturer Part Number: hd64338023s
• Description: Renesas 8-bit Single-chip Microcomputer Super Low Power Series
• Manufacturer: Renesas Electronics Corporation.

Section 9 Timers
Timer Control/Status Register F (TCSRF)
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
Rev. 7.00 Mar 10, 2005 page 268 of 652
REJ09B0042-0700
Bit:
Initial value:
Read/Write:
Note: * Bits 7, 6, 3, and 2 can only be written with 0, for flag clearing.
Description
Clearing condition:
After reading OVFH = 1, cleared by writing 0 to OVFH
Setting condition:
Set when TCFH overflows from H’FF to H’00
Description
Clearing condition:
After reading CMFH = 1, cleared by writing 0 to CMFH
Setting condition:
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