COTS PEM
BOOT SECTOR FLASH
Austin Semiconductor, Inc.
AS29LV016J
TABLE 9: COMMAND DEFINITIONS
Bus Cycles2-5
Third Fourth
First
Second
Fifth
Sixth
Command Sequence1
Addr
RA
Data
RD
Addr
Data
Addr
Data
Addr
Data
Addr
Data
Addr
Data
Read6
Reset7
1
1
XXX
555
F0
Word
Byte
Word
Byte
Word
Byte
2AA
555
2AA
555
2AA
555
555
AAA
555
4
4
4
AA
AA
AA
55
55
55
90
90
90
X00
01
Manufacturer ID
AAA
555
Device ID,
Top Boot Block
Device ID,
X01
X02
X01
X02
(SA)
X02
(SA)
X04
22C4
C4
AAA
555
AAA
555
2249
49
Bottom Boot Block
AAA
AAA
XX00
XX01
00
Word
Byte
555
2AA
555
555
Sector Protect Verify9
4
AA
55
90
AAA
AAA
01
Word
Byte
Word
Byte
Word
Byte
55
1
4
3
98
AA
AA
CFI Query10
Program
AA
555
AAA
555
AAA
XXX
XXX
555
AAA
555
AAA
XXX
XXX
2AA
555
2AA
555
PA
555
AAA
555
55
55
A0
20
PA
PD
Unlock Bypass
Unlock Bypass Program11
Unlock Bypass Reset12
AAA
2
2
A0
90
PD
F0
XXX
2AA
555
2AA
555
Word
Byte
Word
Byte
555
AAA
555
555
AAA
555
2AA
555
2AA
555
555
6
6
AA
AA
55
55
80
80
AA
AA
55
55
10
30
Chip Erase
AAA
SA
Sector Erase
Erase Suspend13
Erase Resume14
AAA
AAA
1
1
B0
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 A19–A12 uniquely select any sector.
Note:
1. See Table 1 for description of bus operations.
2. All values are in hexadecimal.
3. Except for the read cycle and the fourth cycle of the autoselect command sequence, all bus cycles are write cycles.
4. Data bits DQ15–DQ8 are don’t cares for unlock and command cycles.
5. Address bits A19–A11 are don’t cares for unlock and command cycles, unless SA or PA required.
6. No unlock or command cycles required when reading array data.
7. The Reset command is required to return to reading array data when device is in the autoselect mode, or if DQ5 goes high (while
the device is providing status data).
8. The fourth cycle of the autoselect command sequence is a read cycle.
9. The data is 00h for an unprotected sector and 01h for a protected sector. See “Autoselect Command Sequence” for more
information.
10. Command is valid when device is ready to read array data or when device is in autoselect mode.
11. The Unlock Bypass command is required prior to the Unlock Bypass Program command.
12. The Unlock Bypass Reset command is required to return to reading array data when the device is in the unlock bypass mode. F0
is also acceptable.
13. The system may read and program in non-erasing sectors, or enter the autoselect mode, when in the Erase Suspend mode. The
Erase Suspend command is valid only during a sector erase operation.
14. The Erase Resume command is valid only during the Erase Suspend mode.
Austin Semiconductor, Inc. reserves the right to change products or specifications without notice.
AS29LV016J
Rev. 0.0 02/09
21
AUSTIN [ AUSTIN SEMICONDUCTOR ]
