HD6417615 Hitachi Semiconductor, HD6417615 Datasheet - Page 290
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HD6417615
Manufacturer Part Number
HD6417615
Description
Hardware Manual
Manufacturer
Hitachi Semiconductor
Datasheet
1.HD6417615.pdf
(873 pages)
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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
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