as29lv016brg-90/xt Austin Semiconductor, Inc., as29lv016brg-90/xt Datasheet - Page 14

• Manufacturer Part Number: as29lv016brg-90/xt
• Description: 16 Megabit 2m X 8-bit / 1m X 16-bit Cmos 3.0 Volt-only Boot Sector Flash Memory
• Manufacturer: Austin Semiconductor, Inc.

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 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.
AS29LV016
Rev. 2.0 06/06
Table 5: CFI Query Identification String
(Word Mode)
Addresses
1Ah
10h
11h
12h
13h
14h
15h
16h
17h
18h
19h
(Byte Mode)
Addresses
2Ch
20h
22h
24h
26h
28h
2Ah
2Eh
30h
32h
34h
Austin Semiconductor, Inc.
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)
14
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.
Austin Semiconductor, Inc. reserves the right to change products or specifications without notice.
BOO
BOO
BOOT SECT
BOO
BOO
Description
T SECT
T SECT
T SECT
T SECTOR FLASH
CO
CO
CO
COTS PEM
CO
OR FLASH
OR FLASH
OR FLASH
OR FLASH
AS29LV016
TS PEM
TS PEM
TS PEM
TS PEM