A81L801UG-70F View Datasheet(PDF) - AMIC Technology
Part Name
Description
MFG CO.
A81L801UG-70F
AMIC Technology
'A81L801UG-70F' PDF : 47 Pages View PDF
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 verifying sector
protection, the sector address must appear on the appropriate
A81L801
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. A81L801 Autoselect Codes (High Voltage Method)
Description
Mode CE_F OE WE A18 A11 A9 A8 A6 A5 A1 A0
to to
to
to
A12 A10
A7
A2
Manufacturer ID: AMIC
L
Device ID:
Word
A81L801
(Top Boot Block)
L
Byte
Device ID:
Word
A81L801
L
(Bottom Boot Block) Byte
L
H
X X VID X L X L L
L
H
X X VID X L X L H
L
H
X X VID X L X L H
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, CE_S = VIH
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 (March, 2005, Version 0.0)
14
AMIC Technology, Corp.
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