D A T A S H E E T
Command Definitions
Table 14. Am29DL16xD Command Definitions
Bus Cycles (Notes 2–5)
Command
Sequence
(Note 1)
First
Second
Third
Addr
Fourth
Fifth
Sixth
Addr Data Addr Data
Data
Addr
Data
Addr Data Addr Data
Read (Note 6)
Reset (Note 7)
1
1
RA
XXX
555
AAA
555
AAA
555
RD
F0
Word
Manufacturer ID
Byte
2AA
555
2AA
555
2AA
(BA)555
(BA)AAA
(BA)555
(BA)AAA
(BA)555
4
4
AA
AA
55
55
90 (BA)X00
01
Word
(BA)X01
90
(see
Table 7)
Device ID
Byte
(BA)X02
Secured Silicon™
Factory Protect (Note
9)
Word
(BA)X03
4
AA
55
90
81/01
00/01
Byte
AAA
555
(BA)AAA
(BA)X06
Word
Byte
Word
Byte
Word
Byte
Word
Byte
Word
Byte
555
AAA
555
AAA
555
AAA
555
AAA
555
AAA
XXX
XXX
555
AAA
555
AAA
BA
2AA
555
2AA
555
2AA
555
2AA
555
2AA
555
PA
(BA)555
(BA)AAA
555
(SA)X02
90
Sector Protect Verify
(Note 10)
4
3
4
4
3
AA
AA
AA
AA
AA
55
55
55
55
55
(SA)X04
Enter Secured Silicon
Sector Region
88
AAA
555
Exit Secured Silicon Sector
Region
90
A0
20
XXX
PA
00
AAA
555
Program
PD
AAA
555
Unlock Bypass
AAA
Unlock Bypass Program (Note 11)
Unlock Bypass Reset (Note 12)
2
2
A0
90
PD
00
XXX
2AA
555
2AA
555
Word
555
AAA
555
555
AAA
555
2AA
555
2AA
555
555
Chip Erase
Byte
6
6
AA
AA
55
55
80
80
AA
AA
55
55
10
30
AAA
Word
Sector Erase
Byte
SA
AAA
AAA
Erase Suspend (Note 13)
Erase Resume (Note 14)
1
1
B0
30
BA
Word
CFI Query (Note 15)
Byte
55
1
98
AA
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.
BA = Address of the bank that is being switched to autoselect mode, is
in bypass mode, or is being erased.
Notes:
1. See Table 1 for description of bus operations.
8. The fourth cycle of the autoselect command sequence is a read
cycle. The system must provide the bank address to obtain the
manufacturer ID, device ID, or Secured Silicon Sector factory
protect information. Data bits DQ15–DQ8 are don’t care. See the
Autoselect Command Sequence section for more information.
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 care in command sequences,
except for RD and PD.
9. The data is 81h for factory locked and 01h for not factory locked.
10. The data is 00h for an unprotected sector/sector block and 01h for
a protected sector/sector block.
5. Unless otherwise noted, address bits A19–A11 are don’t cares.
6. No unlock or command cycles required when bank is reading
array data.
11. The Unlock Bypass command is required prior to the Unlock
Bypass Program command.
7. The Reset command is required to return to reading array data
(or to the erase-suspend-read mode if previously in Erase
Suspend) when a bank is in the autoselect mode, or if DQ5 goes
high (while the bank is providing status information).
12. The Unlock Bypass Reset command is required to return to
reading array data when the bank is in the unlock bypass mode.
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, and requires the bank address.
14. The Erase Resume command is valid only during the Erase
February 26, 2009 21533E6
Am29DL16xD
29
SPANSION [ SPANSION ]
