ES29LV160F Datasheet, PDF (21/71 Pages) Excel Semiconductor Inc. – 16 Megabit (2 M x 8-Bit/1 M x 16-Bit) CMOS 3.0 Volt-only Boot Sector Flash Memory

ES29LV160F
Excel Semiconductor Inc.
8. Common Flash Memory Interface (CFI)
The Common Flash Interface (CFI) specification outlines 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-independent, 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 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. The system can read CFI information at the addresses given in Table 8.1 to Table 8.4
on page 21-23. 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
Table 8.1 to Table 8.4 on page 21-23. The system must write the reset command to return the
device to the autoselect mode.
Addresses
(Word Mode)
10h
11h
12h
13h
14h
15h
16h
17h
18h
19h
1Ah
Table 8.1 CFI Query Identification String
Addresses
(Byte Mode)
20h
22h
24h
26h
28h
2Ah
2Ch
2Eh
30h
Data
0051h
0052h
0059h
0002h
0000h
0040h
0000h
0000h
0000h
Description
Query Unique ASCll string “QRY”
Primary OEM Command Set
Address for Primary Extended Table
Alternate OEM Command Set (00h = none exists)
32h
0000h
Address for Alternate OEM Extended Table
34h
0000h
(00h = none exists)
Rev.0A (Dec 12, 2007) 21