12. DDR2-SDRAM Interface (DBSC2)
Rev.1.00 Jan. 10, 2008 Page 532 of 1658
REJ09B0261-0100
MCK0,
MCK1
MA[14:11 ]
MA[9:0]
MBA[2:0]
MCKE
M
CS
M
R
A
S
M
C
A
S
M
W
E
MA[10]
ACT
bank A
READ
bank A
Invalid
Invalid
MDQS[3:0]
MDQ[31:0]
MDM[3:0]
Invalid
Invalid
Invalid
SDRAM
command
Valid
Invalid
READ
bank A
Invalid
Invalid
Valid
Invalid
Invalid
Invalid
Valid
Invalid
Valid
Valid
Valid
Valid
Valid
Valid
Hi
g
h level
Example of CL = 3
Read data
Figure 12.9 Waveforms for 32-Byte Reading
(When the Bus Width Is Set to 32 Bits)
Figure 12.10 shows waveforms for 1/2/4/8/16-byte writing when the bus width is set to 32 bits. In
this case, single-writing is performed in which the WRITE command is issued once. In this
example, write access processing is executed for bank A after the ACT command is issued, but
when there is a page hit, access begins with the issue of the WRITE command.
Содержание SH7781
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Страница 1482: ...28 General Purpose I O Ports GPIO Rev 1 00 Jan 10 2008 Page 1452 of 1658 REJ09B0261 0100 ...
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Страница 1688: ...Appendix Rev 1 00 Jan 10 2008 Page 1658 of 1658 REJ09B0261 0100 ...
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