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A290021U-70 View Datasheet(PDF) - AMIC Technology

Part NameDescriptionManufacturer
A290021U-70 256K X 8 Bit CMOS 5.0 Volt-only, Boot Sector Flash Memory AMICC
AMIC Technology AMICC
A290021U-70 Datasheet PDF : 32 Pages
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A29002/A290021 Series
Table 5. A29002/A290021 Command Definitions
Command
Sequence
(Note 1)
First
Second
Addr Data Addr Data
Read (Note 5)
1 RA RD
Reset (Note 6)
1 XXX F0
Manufacturer ID
Autoselect
(Note 7) Device ID Top
Bottom
Continuation ID
4 555 AA
4 555 AA
4 555 AA
2AA 55
2AA 55
2AA 55
Program
Sector
Verify
(Note 8)
Protect 4 555 AA 2AA 55
4 555 AA 2AA 55
Chip Erase
6 555 AA 2AA 55
Sector Erase
6 555 AA 2AA 55
Erase Suspend (Note 9)
1 XXX B0
Erase Resume (Note 10)
1 XXX 30
Bus Cycles (Notes 2 - 4)
Third
Fourth
Fifth
Sixth
Addr Data Addr Data Addr Data Addr Data
555 90 X00 37
555 90 X01 8C
0D
555 90 X11 7F
555 90 SA 00
X02 01
555 A0 PA PD
555 80 555 AA 2AA 55 555 10
555 80 555 AA 2AA 55 SA 30
Legend:
X = Don't care
RA = Address of the memory location to be read.
RD = Data read from location RA during read operation.
PA = Address of the memory location to be programmed. Addresses latch on the falling edge of the WE or CE pulse,
whichever happens later.
PD = Data to be programmed at location PA. Data latches on the rising edge of WE or CE pulse, whichever happens first.
SA = Address of the sector to be verified (in autoselect mode) or erased. Address bits A17 - A13 select a unique sector.
Note:
1. See Table 1 for description of bus operations.
2. All values are in hexadecimal.
3. Except when reading array or autoselect data, all bus cycles are write operation.
4. Address bits A17 - A12 are don't cares for unlock and command cycles, unless SA or PA required.
5. No unlock or command cycles required when reading array data.
6. The Reset command is required to return to reading array data when device is in the autoselect mode, or if I/O5 goes
high (while the device is providing status data).
7. The fourth cycle of the autoselect command sequence is a read cycle.
8. The data is 00h for an unprotected sector and 01h for a protected sector. See "Autoselect Command Sequence" for
more information.
9. The system may read and program in non-erasing sectors, or enter the autoselect mode, when in the Erase Suspend
mode.
10. The Erase Resume command is valid only during the Erase Suspend mode.
PRELIMINARY (June, 2000, Version 0.2)
11
AMIC Technology, Inc.
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