HD6412332 RENESAS [Renesas Technology Corp], HD6412332 Datasheet - Page 177
HD6412332
Manufacturer Part Number
HD6412332
Description
Renesas 16-Bit Single-Chip Microcomputer H8S Family/H8S/2300 Series
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
1.HD6412332.pdf
(1244 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 seven 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]
When 0 is written to CMF after reading CMF = 1
[Setting condition]
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.4.00 Sep. 07, 2007 Page 147 of 1210
REJ09B0245-0400
(Initial value)
(Initial value)
(Initial value)
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