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A290021T-90 View Datasheet(PDF) - AMIC Technology

Part NameDescriptionManufacturer
A290021T-90 256K X 8 Bit CMOS 5.0 Volt-only, Boot Sector Flash Memory AMICC
AMIC Technology AMICC
A290021T-90 Datasheet PDF : 32 Pages
1 2 3 4 5 6 7 8 9 10 Next Last
A29002/A290021 Series
Sector
SA0
SA1
SA2
SA3
SA4
SA5
SA6
Sector
SA0
SA1
SA2
SA3
SA4
SA5
SA6
Table 2. A29002/A290021 Top Boot Block Sector Address Table
A17
A16
A15
A14
A13
Sector Size
(Kbytes)
0
0
X
X
X
64
0
1
X
X
X
64
1
0
X
X
X
64
1
1
0
X
X
32
1
1
1
0
0
8
1
1
1
0
1
8
1
1
1
1
X
16
Address Range
00000h - 0FFFFh
10000h - 1FFFFh
20000h - 2FFFFh
30000h - 3FFFFh
38000h - 39FFFh
3A000h - 3BFFFh
3C000h - 3FFFFh
Table 3. A29002/A290021 Bottom Boot Block Sector Address Table
A17
A16
A15
A14
A13
Sector Size
(Kbytes)
0
0
0
0
X
16
0
0
0
1
0
8
0
0
0
1
1
8
0
0
1
X
X
32
0
1
X
X
X
64
1
0
X
X
X
64
1
1
X
X
X
64
Address Range
00000h - 03FFFh
04000h - 05FFFh
06000h - 07FFFh
08000h - 0FFFFh
10000h - 1FFFFh
20000h - 2FFFFh
30000h - 3FFFFh
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 pinA9. Address
pins A6, A1, and AO 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/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. A29002/A290021 Autoselect Codes (High Voltage Method)
Description
A17 - A13 A12 - A10 A9 A8 - A7 A6 A5 - A2 A1 AO
Manufacturer ID: AMIC
X
X
VID
X
VIL
X
VIL VIL
Identifier Code on
I/O7 - I/O0
37h
Device ID: A29002/
X
A290021
X
VID
X
VIL
X
VIL VIH Top Boot Block: 8Ch
Bottom Boot Block: 0Dh
Sector Protection
Verification
Sector
X
VID
X
VIL
X
VIH VIL
Address
0lh (protected)
00h (unprotected)
Continuation ID
X
X
VID
X
VIL
X
VIH VIH
7Fh
Note: CE =VIL, OE =VIL and WE =VIH when Autoselect Mode
PRELIMINARY (June, 2000, Version 0.2)
6
AMIC Technology, Inc.
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