HD6417615 Hitachi Semiconductor, HD6417615 Datasheet - Page 290

• Manufacturer Part Number: HD6417615
• Description: Hardware Manual
• Manufacturer: Hitachi Semiconductor

Bit 7—Compare Match Flag (CMF): This status flag, which indicates that the values of RTCNT
and RTCOR match, is set/cleared under the following conditions:
Bit 7: CMF
0
1
Bit 6—Compare Match Interrupt Enable (CMIE): Enables or disables an interrupt request caused
by the CMF bit of RTCSR when CMF is set to 1.
Bit 6: CMIE
0
1
Bits 5 to 3—Clock Select Bits (CKS2–CKS0)
Bit 5: CKS2
0
1
Bits 2 to 0—Refresh Count (RRC2–RRC0): These bits specify the number of consecutive
refreshes to be performed when the refresh timer counter (RTCNT) and refresh time constant
register (RTCOR) values match and a refresh request is issued.
Bit 4: CKS1
0
1
0
1
Description
RTCNT and RTCOR match
Clear condition: After RTCSR is read when CMF is 1, 0 is written in CMF
RTCNT and RTCOR do not match
Set condition: RTCNT = RTCOR
Description
Interrupt request caused by CMF is disabled
Interrupt request caused by CMF is enabled
Bit 3: CKS0
0
1
0
1
0
1
0
1
Description
Count-up disabled
P /4
P /16
P /64
P /256
P /1024
P /2048
P /4096
(Initial value)
(Initial value)
273