A29L800TG-70 データシートの表示（PDF） - AMIC Technology
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A29L800TG-70 Datasheet PDF : 41 Pages
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Autoselect Mode
The autoselect mode provides manufacturer and device
identification, and sector protection verification, through
identifier codes output on I/O7 - I/O0. 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 VID (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
A29L800 Series
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/O7 - I/O0.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 VID. See "Command Definitions" for details on
using the autoselect mode.
Table 4. A29L800 Autoselect Codes (High Voltage Method)
Description
Mode CE OE WE A18 A11 A9 A8 A6 A5 A1 A0
to to
to
to
A12 A10
A7
A2
Manufacturer ID: AMIC
L
L
H
X X VID X L X L L
Device ID:
Word
A29L800
(Top Boot Block)
Byte L
L
H
X X VID X L X L H
Device ID:
Word
A29L800
Byte L
L
H
X X VID X L X L H
(Bottom Boot Block)
Continuation ID
L
L
H
X X VID X L X H H
Sector Protection Verification L
L
H SA X VID X L X H L
L=Logic Low= VIL, H=Logic High=VIH, SA=Sector Address, X=Don’t Care.
Note: The autoselect codes may also be accessed in-system via command sequences.
I/O8
to
I/O15
X
B3h
X
B3h
X
X
X
X
I/O7
to
I/O0
37h
1Ah
1Ah
9Bh
9Bh
7Fh
01h
(protected)
00h
(unprotected)
PRELIMINARY (September, 2002, Version 0.2)
10
AMIC Technology, Inc.
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