Section 12 DDR-SDRAM Interface (DDRIF)
Rev.1.00 Dec. 13, 2005 Page 413 of 1286
REJ09B0158-0100
Bit Bit
Name
Initial
Value R/W
Description
45
0 R
Reserved
This bit is always read as 0. The write value should
always be 0.
44 PCKE
0
R/W
Power
Down
This bit controls a low power consumption mode in
which the CKE pin is set low to place the DDR-SDRAM
in “power-down mode” whenever the DDR-SDRAM is
not being accessed (whether it is in the idle state or
bank active state). When the PCKE bit is set to 1, the
DDR-SDRAM enters this power down mode. For
details, see section 12.5.5 (2), Power-Down Mode
(when CKE Goes Low). Note that the SMS bits in SCR
should be set so that the CKE pin is enabled when the
SDRAM is in its initial state.
43 to 35
All
0
R
Reserved
These bits are always read as 0. The write value
should always be 0.
34 SELFS
0
R
Self-Refresh
Decision
Indicates whether the DDR-SDRAM is or is not in the
self-refresh state.
0: Not self-refresh state
1: Self-refresh state
33 RMODE
0
R/W
Refresh
Mode
Select
Specifies whether the DDR-SDRAM is set to auto-
refresh mode or to self-refresh mode. This bit is only
valid if the DRE bit in MIM is set to 1.
0: Auto-refresh mode
1: Self-refresh mode
32 to 29
All
0
R
Reserved
These bits are always read as 0. The write value
should always be 0.
Содержание SH7780 Series
Страница 2: ...Rev 1 00 Dec 13 2005 Page ii of l ...
Страница 28: ...Rev 1 00 Dec 13 2005 Page xxviii of l ...
Страница 50: ...Rev 1 00 Dec 13 2005 Page l of l ...
Страница 82: ...Section 1 Overview Rev 1 00 Dec 13 2005 Page 32 of 1286 REJ09B0158 0100 ...
Страница 122: ...Section 3 Instruction Set Rev 1 00 Dec 13 2005 Page 72 of 1286 REJ09B0158 0100 ...
Страница 146: ...Section 4 Pipelining Rev 1 00 Dec 13 2005 Page 96 of 1286 REJ09B0158 0100 ...
Страница 196: ...Section 6 Floating Point Unit FPU Rev 1 00 Dec 13 2005 Page 146 of 1286 REJ09B0158 0100 ...
Страница 292: ...Section 9 L Memory Rev 1 00 Dec 13 2005 Page 242 of 1286 REJ09B0158 0100 ...
Страница 450: ...Section 11 Local Bus State Controller LBSC Rev 1 00 Dec 13 2005 Page 400 of 1286 REJ09B0158 0100 ...
Страница 492: ...Section 12 DDR SDRAM Interface DDRIF Rev 1 00 Dec 13 2005 Page 442 of 1286 REJ09B0158 0100 ...
Страница 674: ...Section 15 Clock Pulse Generator CPG Rev 1 00 Dec 13 2005 Page 624 of 1286 REJ09B0158 0100 ...
Страница 692: ...Section 16 Watchdog Timer and Reset Rev 1 00 Dec 13 2005 Page 642 of 1286 REJ09B0158 0100 ...
Страница 726: ...Section 18 Timer Unit TMU Rev 1 00 Dec 13 2005 Page 676 of 1286 REJ09B0158 0100 ...
Страница 1004: ...Section 24 Multimedia Card Interface MMCIF Rev 1 00 Dec 13 2005 Page 954 of 1286 REJ09B0158 0100 ...
Страница 1032: ...Section 25 Audio Codec Interface HAC Rev 1 00 Dec 13 2005 Page 982 of 1286 REJ09B0158 0100 ...
Страница 1070: ...Section 26 Serial Sound Interface SSI Module Rev 1 00 Dec 13 2005 Page 1020 of 1286 REJ09B0158 0100 ...
Страница 1104: ...Section 27 NAND Flash Memory Controller FLCTL Rev 1 00 Dec 13 2005 Page 1054 of 1286 REJ09B0158 0100 ...
Страница 1150: ...Section 28 General Purpose I O GPIO Rev 1 00 Dec 13 2005 Page 1100 of 1286 REJ09B0158 0100 ...
Страница 1184: ...Section 29 User Break Controller UBC Rev 1 00 Dec 13 2005 Page 1134 of 1286 REJ09B0158 0100 ...
Страница 1266: ...Section 31 Electrical Characteristics Rev 1 00 Dec 13 2005 Page 1216 of 1286 REJ09B0158 0100 ...
Страница 1328: ...Appendix Rev 1 00 Dec 13 2005 Page 1278 of 1286 REJ09B0158 0100 ...
Страница 1336: ...Rev 1 00 Dec 13 2005 Page 1286 of 1286 REJ09B0158 0100 ...
Страница 1339: ......
Страница 1340: ...SH7780 Hardware Manual ...