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ATTRIBUTE MEMORY DESCRIPTION AND OPERATION SSD-CXXX(I)-3150 DATA SHEET
SILICONSYSTEMS PROPRIETARY
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 PAGE 22 FEBRUARY 2, 2009
ATTRIBUTE MEMORY DESCRIPTION AND OPERATION
The attribute memory plane can be read or written to by asserting the REG#
signal, qualified by the appropriate combination of CE1#, OE#, and WE#. An
attribute memory map describing the type and location of the information
maintained in the attribute memory plane is provided in "Attribute Memory
Map" on page 24.
With respect to SiliconDrive CF, attribute memory consists of two sections:
• Card Information Structure (CIS), which contains a description of the Card’s
capabilities and specifications.
• Function Configuration Registers (FCRs), which consists of four registers,
that can be read or written to by a host to configure the Card for specific
purposes.
ATTRIBUTE MEMORY READ OPERATIONS
Attribute memory read operations are enabled by asserting REG#, OE#, and
CE1# low. Odd byte read operations from the attribute memory plane are not
valid.
Table 18: Attribute Memory Read Operations
Function
Mode
REG# CE1# CE2# A0 OE# WE# D[15:8] D[7:0]
Standby L HHXXXHigh-ZHigh-Z
Byte Access L L H L L H High-Z Even
L H L H L H High-Z Not Valid
Word Access L L L X L H Not Valid Even
Odd Byte
Only Access
L L H X H H Not Valid High-Z