E62655RUSB Renesas Electronics America, E62655RUSB Datasheet - Page 181

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E62655RUSB

Manufacturer Part Number
E62655RUSB
Description
EMULATOR BASE H8S/2655R W/USB
Manufacturer
Renesas Electronics America
Type
Microcontrollerr
Datasheet

Specifications of E62655RUSB

Contents
E6000 Emulator Unit and 4 Logic Probes
For Use With/related Products
H8S/2655R
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
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. 5.00 Sep 14, 2006 page 151 of 1060
R/W
R/W
3
0
3
1
R/W
R/W
2
1
2
0
Section 6 Bus Controller
R/W
REJ09B0331-0500
R/W
1
1
1
0
R/W
R/W
0
1
0
0

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