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H8SX/1663M 데이터시트(PDF) 251 Page - Renesas Technology Corp

부품명 H8SX/1663M
상세설명  Renesas 32-Bit CISC Microcomputer H8SX Family / H8SX/1600 Series
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제조업체  RENESAS [Renesas Technology Corp]
홈페이지  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

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Section 9 Bus Controller (BSC)
Rev. 2.00 Sep. 24, 2008 Page 219 of 1468
REJ09B0412-0200
9.2.17
Refresh Timer Counter (RTCNT)
RTCNT counts up on the internal clock selected by bits RTCK2 to RTCK0 in REFCR.
When the RTCNT value matches the RTCOR value (compare match), the CMF flag in REFCR is
set to 1 and RTCNT is initialized to H'00. At this time, when the RFSHE bit in REFCR is set to 1,
a refresh cycle is generated. When the RFSHE bit is cleared to 0 and the CMIE bit in REFCR is
set to 1, a compare match interrupt (CMI) is generated.
Bit
Bit Name
Initial Value
R/W
7
0
R/W
6
0
R/W
5
0
R/W
4
0
R/W
3
0
R/W
2
0
R/W
1
0
R/W
0
0
R/W
9.2.18
Refresh Time Constant Register (RTCOR)
RTCOR specifies intervals at which a compare match for RTCOR and RTCNT is generated.
The RTCOR value is always compared with the RTCNT value. When they match, the CMF flag
in REFCR is set to 1 and RTCNT is initialized to H'00.
Bit
Bit Name
Initial Value
R/W
7
1
R/W
6
1
R/W
5
1
R/W
4
1
R/W
3
1
R/W
2
1
R/W
1
1
R/W
0
1
R/W



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