ds42585 Advanced Micro Devices, ds42585 Datasheet - Page 20

• Manufacturer Part Number: ds42585
• Description: Stacked Multi-chip Package Mcp Flash Memory And Sram
• Manufacturer: Advanced Micro Devices

Power-Up Write Inhibit
If WE# = CE#f = V
the device does not accept commands on the rising
edge of WE#. The internal state machine is automati-
cally reset to reading array data on power-up.
COMMON FLASH MEMORY INTERFACE
(CFI)
The Common Flash Interface (CFI) specification out-
lines device and host system software interrogation
handshake, which allows specific vendor-specified
software algorithms to be used for entire families of
devices. Software support can then be device-inde-
pendent, JEDEC ID-independent, and forward- and
backward-compatible for the specified flash device
families. Flash vendors can standardize their existing
interfaces for long-term compatibility.
This device enters the CFI Query mode when the sys-
tem writes the CFI Query command, 98h, to address
20
(Word Mode)
Addresses
1Ah
10h
12h
13h
14h
15h
16h
17h
18h
19h
11h
(Byte Mode)
IL
Addresses
and OE# = V
2Ch
2Ah
2Eh
20h
22h
24h
26h
28h
30h
32h
34h
IH
Table 8. CFI Query Identification String
during power up,
0051h
0052h
0059h
0002h
0000h
0040h
0000h
0000h
0000h
0000h
0000h
Data
P R E L I M I N A R Y
Query Unique ASCII string “QRY”
Primary OEM Command Set
Address for Primary Extended Table
Alternate OEM Command Set (00h = none exists)
Address for Alternate OEM Extended Table (00h = none exists)
DS42585
55h in word mode (or address AAh in byte mode), any
time the device is ready to read array data. The sys-
tem can read CFI information at the addresses given
in Tables 8–11. To terminate reading CFI data, the sys-
tem must write the reset command. The CFI Query
mode is not accessible when the device is executing
an Embedded Program or embedded erase algorithm.
The system can also write the CFI query command
when the device is in the autoselect mode. The device
enters the CFI query mode, and the system can read
CFI data at the addresses given in Tables 8–11. The
system must write the reset command to return the de-
vice to the autoselect mode.
For further information, please refer to the CFI Specifi-
cation and CFI Publication 100, available via the
World Wide Web at http://www.amd.com/prod-
ucts/nvd/overview/cfi.html. Alternatively, contact an
AMD representative for copies of these documents.
Description