AM29F032B Advanced Micro Devices, AM29F032B Datasheet - Page 18

• Manufacturer Part Number: AM29F032B
• Description: 32 Megabit (4 M x 8-Bit) CMOS 5.0 Volt-only/ Uniform Sector Flash Memory
• Manufacturer: Advanced Micro Devices

Command Definitions
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.
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
4. Address bits A21–A11 are don’t cares for unlock and
5. No unlock or command cycles required when reading
6. The Reset command is required to return to reading array
Read (Note 5)
Reset (Note 6)
Program
Chip Erase
Sector Erase
Erase Suspend (Note 9)
Erase Resume (Note 10)
Autoselect
(Note 7)
cycles are write operations.
command cycles, unless SA or PA required.
array data.
data when device is in the autoselect mode, or if DQ5
goes high (while the device is providing status data).
Command
Sequence
(Note 1)
Manufacturer ID
Device ID
Sector Group Protect
Verify (Note 8)
1
1
4
4
4
4
6
6
1
1
Table 5. Am29F032B Command Definitions
Addr
XXX
XXX
XXX
555
555
555
555
555
555
RA
First
Data
RD
AA
AA
AA
AA
AA
AA
F0
B0
30
Addr
2AA
2AA
2AA
2AA
2AA
2AA
Am29F032B
Second
Data
55
55
55
55
55
55
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 A21–A16 select a unique sector.
SGA = Address of the sector group to be verified. Address
bits A21–A18 select a unique sector group.
7. The fourth cycle of the autoselect command sequence is
8. The data is 00h for an unprotected sector group and 01h
9. The system may read and program in non-erasing
10. The Erase Resume command is valid only during the
a read cycle.
for a protected sector group.See “Autoselect Command
Sequence
sectors, or enter the autoselect mode, when in the Erase
Suspend mode. The Erase Suspend command is valid
only during a sector erase operation.
Erase Suspend mode.
Addr
555
555
555
555
555
555
Bus Cycles (Notes 2–4)
Third
Data Addr
90
A0
”
90
90
80
80
for more information.
SGA
X00
X01
X02
555
555
PA
Fourth
XX00
XX01
Data
PD
AA
AA
01
41
Addr Data
2AA
2AA
Fifth
55
55
Addr
555
SA
Sixth
Data
10
30
17