Common memory description and operation, Common memory read operations, Common memory write operations – Silicon Image SiliconDrive CF SSD-C08G(I)-3150 User Manual
Page 50: Table 26: common memory read operations, Table 27: common memory write operations, Common, Common memory write
C
OMMON
M
EMORY
D
ESCRIPTION
AND
O
PERATION
SSD-C
XXX
(I)-3150 D
ATA
S
HEET
S
ILICON
S
YSTEMS
P
ROPRIETARY
This document and the information contained within it is confidential and proprietary to SiliconSystems, Inc.
All unauthorized use and/or reproduction is prohibited.
3150C-10DSR
P
AGE
40
F
EBRUARY
2, 2009
C
OMMON
M
EMORY
D
ESCRIPTION
AND
O
PERATION
Common memory space can be accessed when the SiliconDrive is configured
in memory-mapped mode.
C
OMMON
M
EMORY
R
EAD
O
PERATIONS
Common memory read operations are issued by asserting CE1#, CE2#, or
both, and OE# low, REG#, and WE# must be inactive.
C
OMMON
M
EMORY
W
RITE
O
PERATIONS
Common memory write operations are issued by asserting CE1#, CE2#, or
both, and WE# low, REG#, and OE# must be inactive.
Table 26: Common Memory Read Operations
Function Mode REG# CE1# CE2# A0 OE#
WE#
D[15:8] D[7:0]
Standby
X
H
H
X
X
X
High-Z High-Z
Byte Access
H
L
H
L
L
H
High-Z Even
H
L
H
H
L
H
High-Z Odd
Word Access
H
L
L
X
L
H
Odd
Even
Odd Byte Only
Access
H
H
L
X
L
H
Odd
High-Z
Table 27: Common Memory Write Operations
Function Mode REG# CE1# CE2# A0 OE#
WE#
D[15:8] D[7:0]
Standby
X
H
H
X
X
X
High-Z
High-Z
Byte Access
H
L
H
L
H
L
High-Z
Even
H
L
H
H
H
L
High-Z
Odd
Word Access
H
L
L
X
H
L
Odd
Even
Odd Byte Only
Access
H
H
L
X
H
L
Odd
High-Z