FLASH
Austin Semiconductor, Inc.
TABLE 4: Command Definitions (Applies to each device
8
)
CYCLES
2,3
AS8F128K32
COMMAND SEQUENCE
Read
4
5
1
FIRST
SECOND
8
Addr Data Addr Data
8
RA
555
555
555
555
555
555
555
555
RD
AA
AA
AA
AA
AA
AA
AA
2AA
2AA
2AA
2AA
2AA
2AA
2AA
2AA
55
55
55
55
55
55
55
BUS CYCLES
FIFTH
SIXTH
THIRD
FOURTH
8
8
8
Addr Data Addr Data Addr Data Addr Data
8
555
555
555
555
555
555
555
555
F0
90
90
90
A0
80
80
1
Manufacturer ID
Device ID
Sector Protect Verify
7
Reset
Autoselect
6
3
4
4
4
4
6
6
XX00
XX01
(SA)
X02
PA
555
555
1
20
00
01
PD
AA
AA
Program
Chip Erase
Sector Erase
2AA
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/O
3: Sector Erase Timer" for more information.
AS8F128K32
Rev. 2.0 5/03
Austin Semiconductor, Inc. reserves the right to change products or specifications without notice.
8
AUSTIN [ AUSTIN SEMICONDUCTOR ]
