Section 12 DDR-SDRAM Interface (DDRIF)
Rev.1.00 Dec. 13, 2005 Page 420 of 1286
REJ09B0158-0100
Bit Bit
Name
Initial
Value R/W Description
10 to 8
SRAS
000
R/W
Minimum Number of Cycles between ACT and PRE
Commands
These bits specify the minimum number of cycles until
a PRE command is issued after an ACT command has
been issued (the corresponding time is tRAS) for the
same bank.
000: 6 cycles
001: 7 cycles
010: 8 cycles
011: 9 cycles
Other than above: Setting prohibited
7 to 5
SRC
000
R/W
Auto-Refresh/ACT Command Issuance Cycle
These bits specify the number of cycles between the
following access operations in a given bank (the
corresponding time is tRC).
(1) From issuing the ACT command to auto-refresh
(2) From issuing one ACT command to issuing the next
ACT command
000: 6 cycles
001: 7 cycles
010: 8 cycles
011: 9 cycles
100: 10 cycles
101: 11 cycles
110: 12 cycles
111: 13 cycles
Other than above: Setting prohibited
4 to 2
SCL
000
R/W
CAS Latency
These bits specify the CAS latency (CL) in data read
operation.
000: 2.5 cycles
Other than above: Setting prohibited
Summary of Contents for SH7780 Series
Page 2: ...Rev 1 00 Dec 13 2005 Page ii of l ...
Page 28: ...Rev 1 00 Dec 13 2005 Page xxviii of l ...
Page 50: ...Rev 1 00 Dec 13 2005 Page l of l ...
Page 82: ...Section 1 Overview Rev 1 00 Dec 13 2005 Page 32 of 1286 REJ09B0158 0100 ...
Page 122: ...Section 3 Instruction Set Rev 1 00 Dec 13 2005 Page 72 of 1286 REJ09B0158 0100 ...
Page 146: ...Section 4 Pipelining Rev 1 00 Dec 13 2005 Page 96 of 1286 REJ09B0158 0100 ...
Page 196: ...Section 6 Floating Point Unit FPU Rev 1 00 Dec 13 2005 Page 146 of 1286 REJ09B0158 0100 ...
Page 292: ...Section 9 L Memory Rev 1 00 Dec 13 2005 Page 242 of 1286 REJ09B0158 0100 ...
Page 492: ...Section 12 DDR SDRAM Interface DDRIF Rev 1 00 Dec 13 2005 Page 442 of 1286 REJ09B0158 0100 ...
Page 674: ...Section 15 Clock Pulse Generator CPG Rev 1 00 Dec 13 2005 Page 624 of 1286 REJ09B0158 0100 ...
Page 692: ...Section 16 Watchdog Timer and Reset Rev 1 00 Dec 13 2005 Page 642 of 1286 REJ09B0158 0100 ...
Page 726: ...Section 18 Timer Unit TMU Rev 1 00 Dec 13 2005 Page 676 of 1286 REJ09B0158 0100 ...
Page 1032: ...Section 25 Audio Codec Interface HAC Rev 1 00 Dec 13 2005 Page 982 of 1286 REJ09B0158 0100 ...
Page 1150: ...Section 28 General Purpose I O GPIO Rev 1 00 Dec 13 2005 Page 1100 of 1286 REJ09B0158 0100 ...
Page 1184: ...Section 29 User Break Controller UBC Rev 1 00 Dec 13 2005 Page 1134 of 1286 REJ09B0158 0100 ...
Page 1266: ...Section 31 Electrical Characteristics Rev 1 00 Dec 13 2005 Page 1216 of 1286 REJ09B0158 0100 ...
Page 1328: ...Appendix Rev 1 00 Dec 13 2005 Page 1278 of 1286 REJ09B0158 0100 ...
Page 1336: ...Rev 1 00 Dec 13 2005 Page 1286 of 1286 REJ09B0158 0100 ...
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