ATTRIBUTE MEMORY DESCRIPTION AND OPERATION |
|
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 25.
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 | REG# CE1# CE2# | A0 | OE# | WE# | D[15:8] | D[7:0] | |||
Mode | |||||||||
|
|
|
|
|
|
|
| ||
|
|
|
|
|
|
|
|
| |
Standby | L | H | H | X | X | X | |||
|
|
|
|
|
|
|
|
| |
Byte Access | L | L | H | L | L | H | Even | ||
|
|
|
|
|
|
|
|
| |
| L | H | L | H | L | H | Not Valid | ||
|
|
|
|
|
|
|
|
| |
Word Access | L | L | L | X | L | H | Not Valid | Even | |
|
|
|
|
|
|
|
|
| |
Odd Byte | L | L | H | X | H | H | Not Valid | ||
Only Access |
|
|
|
|
|
|
|
| |
|
|
|
|
|
|
|
|
|
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.
PAGE 23 | FEBRUARY 2, 2009 |