A29L400A AMICC [AMIC Technology], A29L400A Datasheet - Page 9

• Manufacturer Part Number: A29L400A
• Description: 512K X 8 Bit / 256K X 16 Bit CMOS 3.0 Volt-only, Boot Sector Flash Memory
• Manufacturer: AMICC [AMIC Technology]

Autoselect Mode
The autoselect mode provides manufacturer and device
identification, and sector protection verification, through
identifier codes output on I/O
intended for programming equipment to automatically
match a device to be programmed with its corresponding
programming algorithm. However, the autoselect codes
can also be accessed in-system through the command
register.
When using programming equipment, the autoselect mode
requires V
pins A6, A1, and A0 must be as shown in Autoselect
Codes (High Voltage Method) table. In addition, when
L=Logic Low= V
Note: The autoselect codes may also be accessed in-system via command sequences.
PRELIMINARY
Description
Manufacturer ID: AMIC
Device ID:
A29L400A
(Top Boot Block)
Device ID:
A29L400A
(Bottom Boot
Block)
Continuation ID
Sector Protection
Verification
ID
(11.5V to 12.5 V) on address pin A9. Address
IL
, H=Logic High=V
(July, 2005, Version 0.0)
Mode
Word
Word
Byte
Byte
Table 4. A29L400A Autoselect Codes (High Voltage Method)
7
- I/O
CE
L
L
L
L
L
IH
0
. This mode is primarily
, SA=Sector Address, X=Don’t Care.
OE
L
L
L
L
L
WE
H
H
H
H
H
A17
A12
SA
to
X
X
X
X
A10
A11
to
X
X
X
X
X
8
A9
V
V
V
V
V
verifying sector protection, the sector address must appear
on the appropriate highest order address bits. Refer to the
corresponding Sector Address Tables. The Command
Definitions table shows the remaining address bits that are
don't care. When all necessary bits have been set as
required, the programming equipment may then read the
corresponding identifier code on I/O
autoselect codes in-system, the host system can issue the
autoselect command via the command register, as shown
in the Command Definitions table. This method does not
require V
the autoselect mode.
ID
ID
ID
ID
ID
A8
A7
to
X
X
X
X
X
ID
. See "Command Definitions" for details on using
A6
L
L
L
L
L
A5
A2
to
X
X
X
X
X
A1
H
H
L
L
L
AMIC Technology, Corp.
A0
H
H
H
L
L
A29L400A Series
I/O
I/O
B3h
B3h
to
7
X
X
X
X
X
X
15
- I/O
8
0
.To access the
(unprotected)
(protected)
B5h
B5h
7Fh
I/O
I/O
37h
34h
34h
01h
00h
to
7
0