AM29F160D AMD [Advanced Micro Devices], AM29F160D Datasheet - Page 16

• Manufacturer Part Number: AM29F160D
• Description: 16 Megabit (2 M x 8-Bit/1 M x 16-Bit) CMOS 5.0 Volt-only, Boot Sector Flash Memory
• Manufacturer: AMD [Advanced Micro Devices]

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-indepen-
dent, JEDEC ID-independent, and forward- and back-
ward-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
system writes the CFI Query command, 98h, to
address 55h in word mode (or address AAh in byte
mode), any time the device is ready to read array data.
(Word Mode)
Addresses
1Ah
10h
11h
12h
13h
14h
15h
16h
17h
18h
19h
(Byte Mode)
Addresses
2Ah
2Ch
2Eh
20h
22h
24h
26h
28h
30h
32h
34h
Table 5. CFI Query Identification String
0051h
0052h
0059h
0002h
0000h
0040h
0000h
0000h
0000h
0000h
0000h
Data
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)
Am29F160D
The system can read CFI information at the addresses
given in Tables 5–8. In word mode, the upper address
bits (A7–MSB) must be all zeros. To terminate reading
CFI data, the system must write the reset command.
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 5–8. The
system must write the reset command to return the
device 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/products/nvd/over-
view/cfi.html. Alternatively, contact an AMD represen-
tative for copies of these documents.
Description
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