HD6433045 HITACHI [Hitachi Semiconductor], HD6433045 Datasheet - Page 167

• Manufacturer Part Number: HD6433045
• Description: Hitachi Single-Chip Microcomputer
• Manufacturer: HITACHI [Hitachi Semiconductor]

7.2.2 Refresh Timer Control/Status Register (RTMCSR)
RTMCSR is an 8-bit readable/writable register that selects the clock source for RTCNT. It also
enables or disables interrupt requests when the refresh controller is used as an interval timer.
Bits 7 and 6 are initialized by a reset and in standby mode. Bits 5 to 3 are initialized by a reset and
in hardware standby mode, but retain their previous values on transition to software standby mode.
Bit 7—Compare Match Flag (CMF): This status flag indicates that the RTCNT and RTCOR
values have matched.
Bit 7
CMF
0
1
Bit
Initial value
Read/Write
Note:
*
Only 0 can be written, to clear the flag.
Description
[Clearing condition]
Cleared by reading CMF when CMF = 1, then writing 0 in CMF
[Setting condition]
When RTCNT = RTCOR
Compare match flag
Status flag indicating that RTCNT has matched RTCOR
R/(W)
CMF
7
0
*
Compare match interrupt enable
Enables or disables the CMI interrupt requested by CMF
CMIE
R/W
6
0
CKS2
R/W
5
0
Clock select 2 to 0
These bits select an
internal clock source
for input to RTCNT
153
CKS1
R/W
4
0
CKS0
R/W
3
0
—
—
2
1
Reserved bits
—
—
1
1
—
—
0
1