H8S-2350 RENESAS [Renesas Technology Corp], H8S-2350 Datasheet - Page 175
![no-image](/images/no-image-200.jpg)
H8S-2350
Manufacturer Part Number
H8S-2350
Description
16-Bit Single-Chip Microcomputer
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
1.H8S-2350.pdf
(1025 pages)
- Current page: 175 of 1025
- Download datasheet (6Mb)
6.2.8
RTCNT is an 8-bit readable/writable up-counter.
RTCNT counts up using the internal clock selected by bits CKS2 to CKS0 in DRAMCR.
When RTCNT matches RTCOR (compare match), the CMF flag in DRAMCR is set to 1 and
RTCNT is cleared to H'00. If the RFSHE bit in DRAMCR is set to 1 at this time, a refresh cycle is
started. Also, if the CMIE bit in DRAMCR is set to 1, a compare match interrupt (CMI) is
generated.
RTCNT is initialized to H'00 by a power-on reset and in hardware standby mode. It is not
initialized by a manual reset or in software standby mode.
6.2.9
RTCOR is an 8-bit readable/writable register that sets the period for compare match operations
with RTCNT.
The values of RTCOR and RTCNT are constantly compared, and if they match, the CMF flag in
DRAMCR is set to 1 and RTCNT is cleared to H'00.
RTCOR is initialized to H'FF by a power-on reset and in hardware standby mode. It is not
initialized by a manual reset or in software standby mode.
Bit
Initial value
R/W
Bit
Initial value
R/W
Refresh Timer/Counter (RTCNT)
Refresh Time Constant Register (RTCOR)
:
:
:
:
:
:
R/W
R/W
7
0
7
1
R/W
R/W
6
0
6
1
R/W
R/W
5
0
5
1
R/W
R/W
4
0
4
1
Rev. 3.00 Sep 15, 2006 page 141 of 988
R/W
R/W
3
0
3
1
R/W
R/W
2
1
2
0
Section 6 Bus Controller
R/W
REJ09B0330-0300
R/W
1
1
1
0
R/W
R/W
0
1
0
0
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