HD6412320 RENESAS [Renesas Technology Corp], HD6412320 Datasheet - Page 193
HD6412320
Manufacturer Part Number
HD6412320
Description
Renesas 16-Bit Single-Chip Microcomputer H8S Family H8S-2300 Series
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
1.HD6412320.pdf
(1302 pages)
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Bit 4—Compare Match Flag (CMF): Status flag that indicates a match between the values of
RTCNT and RTCOR.
When refresh control is performed (RFSHE = 1), 1 should be written to the CMF bit when writing
to DRAMCR.
Bit 4
CMF
0
1
Bit 3—Compare Match Interrupt Enable (CMIE): Enables or disables interrupt requests (CMI)
by the CMF flag when the CMF flag in DRAMCR is set to 1.
When refresh control is performed (RFSHE = 1), the CMIE bit is always cleared to 0.
Bit 3
CMIE
0
1
Bits 2 to 0—Refresh Counter Clock Select (CKS2 to CKS0): These bits select the clock to be
input to RTCNT from among 7 internal clocks obtained by dividing the system clock (φ). When
the input clock is selected with bits CKS2 to CKS0, RTCNT begins counting up.
Bit 2
CKS2
0
1
Description
[Clearing condition]
Cleared by reading the CMF flag when CMF = 1, then writing 0 to the CMF flag
[Setting condition]
Set when RTCNT = RTCOR
Description
Interrupt request (CMI) by CMF flag disabled
Interrupt request (CMI) by CMF flag enabled
Bit 1
CKS1
0
1
0
1
Bit 0
CKS0
0
1
0
1
0
1
0
1
Description
Count operation disabled
Count uses φ/2
Count uses φ/8
Count uses φ/32
Count uses φ/128
Count uses φ/512
Count uses φ/2048
Count uses φ/4096
Rev.6.00 Sep. 27, 2007 Page 163 of 1268
Section 6 Bus Controller
REJ09B0220-0600
(Initial value)
(Initial value)
(Initial value)
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