FLASH
AS8F128K32
Austin Semiconductor, Inc.
TABLE 4: Command Definitions (Applies to each device8)
2,3
BUS CYCLES
1
FIRST
SECOND
Addr
THIRD
Addr
FOURTH
Addr
FIFTH
Addr
SIXTH
Addr
COMMAND SEQUENCE
Data8
Data8
Data8
Data8
Data8
Data8
Addr
RA
4
5
1
3
RD
Read
555
AA 2AA
55
555
F0
90 XX00
90 XX01 20
Reset
Manufacturer ID
Device ID
4
4
555
555
AA 2AA
AA 2AA
55
55
555
555
1
6
Autoselect
555
555
2AA
AA
555
555
00
(SA)
X02
7
4
55
90
Sector Protect Verify
2AA
01
Program
Chip Erase
Sector Erase
4
6
6
555
555
555
AA 2AA
AA 2AA
AA 2AA
55
55
55
555
555
555
A0
80
80
PA
555
555
PD
AA 2AA
AA 2AA
55
55
555
SA
10
30
NOTES:
1. See Table 1 for description of bus operations.
2. All values are in hexadecimal.
3. Except when reading array or autoselect data, all command bus cycles are write operations.
4. No unlock or command cycles required when reading array data.
5. 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).
6. The fourth cycle of the autoselect command sequence is a read operation.
7. The data is 00h for an unprotected sector and 01h for a protected sector. See “Autoselect Command Sequence” for more information.
8. Data shown for each respective byte I/O31-I/O24, I/O25-I/O16, I/O15-I/O8, I/O7-I/O0.
FIGURE 2: Erase Operation
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 WEx\ or CEx\ pulse, whichever
happens later.
PD = Data to be programmed at location PA. Data latches on the rising
edge of WEx\ or CEx\ pulse, whichever happens first.
SA = Address of the sector to be verified (in autoselect mode) or erased.
Address bits A16–A14 uniquely select any sector.
NOTE:
1. See the appropriate Command Definitions table for program command sequence.
2. See "I/O3: Sector Erase Timer" for more information.
Austin Semiconductor, Inc. reserves the right to change products or specifications without notice.
AS8F128K32
Rev. 2.0 5/03
8
AUSTIN [ AUSTIN SEMICONDUCTOR ]
