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Section 12 Bus State Controller (BSC)
Rev. 4.00 Sep. 14, 2005 Page 317 of 982
REJ09B0023-0400
Bit Bit
Name
Initial
Value R/W Description
2
0
R
Reserved
This bit is always read as 0. The write value should
always be 0.
1
0
A3COL1
A3COL0
0
0
R/W
R/W
Number of Bits of Column Address for Area 3
Specify the number of bits of the column address for
area 3.
00: 8 bits
01: 9 bits
10: 10 bits
11: Reserved (Setting prohibited)
12.4.5
Refresh Timer Control/Status Register (RTCSR)
RTCSR specifies various items about refresh for SDRAM. This register is initialized to
H'00000000 by a power-on reset, and it is not initialized by a manual reset and in the standby
mode. When the RTCSR is written, the upper 16 bits of the write data must be H'A55A to cancel
write protection.
The clock which counts up the refresh timer counter (RTCNT) is adjusted its phase only by a
power-on reset. Thus, when CKS[2:0] are set to other than B'000 and a timer is in operation, an
error is found until the first compare match flag is set.
Bit Bit
Name
Initial
Value R/W Description
31 to 8
All
0
R
Reserved
These bits are always read as 0.
7 CMF 0 R/W
Compare
Match
Flag
Indicates that a compare match occurs between the
refresh timer counter (RTCNT) and refresh time
constant register (RTCOR). This bit is set or cleared in
the following conditions.
0: Clearing condition: When 0 is written in CMF after
reading out RTCSR during CMF = 1.
1: Setting condition: When the condition RTCNT =
RTCOR is satisfied.
Содержание HD6417641
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Страница 11: ...Rev 4 00 Sep 14 2005 Page xi of l USB Universal serial bus WDT Watch dog timer...
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Страница 204: ...Section 4 Clock Pulse Generator CPG Rev 4 00 Sep 14 2005 Page 154 of 982 REJ09B0023 0400...
Страница 212: ...Section 5 Watchdog Timer WDT Rev 4 00 Sep 14 2005 Page 162 of 982 REJ09B0023 0400...
Страница 228: ...Section 6 Power Down Modes Rev 4 00 Sep 14 2005 Page 178 of 982 REJ09B0023 0400...
Страница 246: ...Section 8 X Y Memory Rev 4 00 Sep 14 2005 Page 196 of 982 REJ09B0023 0400...
Страница 318: ...Section 11 User Break Controller UBC Rev 4 00 Sep 14 2005 Page 268 of 982 REJ09B0023 0400...
Страница 454: ...Section 12 Bus State Controller BSC Rev 4 00 Sep 14 2005 Page 404 of 982 REJ09B0023 0400...
Страница 500: ...Section 13 Direct Memory Access Controller DMAC Rev 4 00 Sep 14 2005 Page 450 of 982 REJ09B0023 0400...
Страница 504: ...Section 14 U Memory Rev 4 00 Sep 14 2005 Page 454 of 982 REJ09B0023 0400...
Страница 566: ...Section 17 Compare Match Timer CMT Rev 4 00 Sep 14 2005 Page 516 of 982 REJ09B0023 0400...
Страница 734: ...Section 18 Multi Function Timer Pulse Unit MTU Rev 4 00 Sep 14 2005 Page 684 of 982 REJ09B0023 0400...
Страница 868: ...Section 21 A D Converter Rev 4 00 Sep 14 2005 Page 818 of 982 REJ09B0023 0400...
Страница 914: ...Section 23 I O Ports Rev 4 00 Sep 14 2005 Page 864 of 982 REJ09B0023 0400...
Страница 956: ...Section 24 List of Registers Rev 4 00 Sep 14 2005 Page 906 of 982 REJ09B0023 0400...
Страница 1016: ...Section 25 Electrical Characteristics Rev 4 00 Sep 14 2005 Page 966 of 982 REJ09B0023 0400...
Страница 1024: ...Appendix Rev 4 00 Sep 14 2005 Page 974 of 982 REJ09B0023 0400...
Страница 1032: ...Rev 4 00 Sep 14 2005 Page 982 of 982 REJ09B0023 0400 X X Y data addressing 52 X Y memory 193...
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Страница 1036: ...SH7641 Hardware Manual...