P R E L I M I N A R Y
Table 5.
Cycles
Am29F016B Command Definitions
Bus Cycles (Notes 2鈥?)
Command
Sequence
(Note 1)
Read (Note 5)
Reset (Note 6)
Manufacturer ID
First
Addr
RA
XXX
555
555
555
555
555
555
XXX
XXX
Data
RD
F0
AA
AA
AA
AA
AA
AA
B0
30
Second
Addr
Data
Third
Addr
Fourth
Data Addr
Data
Fifth
Addr Data
Sixth
Addr
Data
1
1
4
4
4
4
6
6
1
1
2AA
2AA
2AA
2AA
2AA
2AA
55
55
55
55
55
55
555
555
555
555
555
555
90
90
90
A0
80
80
X00
X01
SGA
X02
PA
555
555
01
AD
XX00
XX01
PD
AA
AA
2AA
2AA
55
55
555
SA
10
30
Autoselect
Device ID
(Note 7)
Sector Group Protect
Verify (Note 8)
Program
Chip Erase
Sector Erase
Erase Suspend (Note 9)
Erase Resume (Note 10)
Legend:
X = Don鈥檛 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 A20鈥揂16 select a unique sector.
SGA = Address of the sector group to be verified. Address
bits A20鈥揂18 select a unique sector group.
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 bus
cycles are write operations.
4. Address bits A20鈥揂11 are don鈥檛 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 DQ5
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 group and 01h
for a protected sector group. See 鈥淎utoselect Command
Sequence鈥?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. The Erase Suspend command is valid
only during a sector erase operation.
10. The Erase Resume command is valid only during the
Erase Suspend mode.
Am29F016B
17