参数资料
型号: A29L800SERIES
英文描述: 1M X 8 Bit / 512K X 16 Bit CMOS 3.0 Volt-only. Boot Sector Flash Memory
中文描述: 100万× 8位/ 16位为512k ×电压的CMOS 3.0只。引导扇区闪存
文件页数: 10/41页
文件大小: 396K
代理商: A29L800SERIES
A29L800 Series
PRELIMINARY (September, 2002, Version 0.2)
10
AMIC Technology, Inc.
Autoselect Mode
The autoselect mode provides manufacturer and device
identification, and sector protection verification, through
identifier codes output on I/O
7
- I/O
0
. This mode is primarily
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
ID
(11.5V to 12.5 V) on address pin A9. Address
pins A6, A1, and A0 must be as shown in Autoselect
Codes (High Voltage Method) table. In addition, when
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
7
- I/O
0
.To access the
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
ID
. See "Command Definitions" for details on
using the autoselect mode.
Table 4. A29L800 Autoselect Codes (High Voltage Method)
Description
Mode
CE
L
OE
L
WE
A18
to
A12
A11
to
A10
A9
A8
to
A7
X
A6
A5
to
A2
X
A1
A0
I/O
8
to
I/O
15
X
B3h
I/O
7
to
I/O
0
37h
1Ah
Manufacturer ID: AMIC
Device ID:
A29L800
(Top Boot Block)
Device ID:
A29L800
(Bottom Boot Block)
H
X
X
V
ID
L
L
L
Word
Byte
L
L
H
X
X
V
ID
X
L
X
L
H
X
1Ah
Word
B3h
9Bh
Byte
L
L
H
X
X
V
ID
X
L
X
L
H
X
9Bh
Continuation ID
L
L
H
X
X
V
ID
X
L
X
H
H
X
7Fh
X
01h
(protected)
00h
(unprotected)
Sector Protection Verification
L
L
H
SA
X
V
ID
X
L
X
H
L
X
L=Logic Low= V
IL
, H=Logic High=V
IH
, SA=Sector Address, X=Don’t Care.
Note: The autoselect codes may also be accessed in-system via command sequences.
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