L200BB55RD AMD [Advanced Micro Devices], L200BB55RD Datasheet - Page 21

• Manufacturer Part Number: L200BB55RD
• Description: 2 Megabit (256 K x 8-Bit/128 K x 16-Bit) CMOS 3.0 Volt-only Boot Sector Flash Memory
• Manufacturer: AMD [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 cycles
4. Data bits DQ15–DQ8 are don’t cares for unlock and
5. Address bits A16–A11 are don’t cares for unlock and
6. No unlock or command cycles required when reading array
7. The Reset command is required to return to reading array
8. The fourth cycle of the autoselect command sequence is a
October 10, 2006 21521D6
Read (Note 6)
Reset (Note 7)
Program
Unlock Bypass
Unlock Bypass Program (Note 10)
Unlock Bypass Reset (Note 11)
Chip Erase
Sector Erase
Erase Suspend (Note 12)
Erase Resume (Note 13)
are write operations.
command cycles.
command cycles, unless SA or PA required.
data.
data when device is in the autoselect mode, or if DQ5 goes
high (while the device is providing status data).
read cycle.
Manufacturer ID
Device ID,
Top Boot Block
Device ID,
Bottom Boot Block
Sector Protect Verify
(Note 9)
Command
Sequence
(Note 1)
Word
Word
Word
Word
Word
Word
Word
Word
Byte
Byte
Byte
Byte
Byte
Byte
Byte
Byte
Table 5. Am29LV200B Command Definitions
1
1
4
4
4
4
4
3
2
2
6
6
1
1
Addr
XXX
AAA
AAA
AAA
AAA
AAA
AAA
XXX
XXX
AAA
AAA
XXX
XXX
555
555
555
555
555
555
555
555
RA
First
Data
RD
AA
AA
AA
AA
AA
AA
A0
AA
AA
B0
F0
90
30
D A T A S H E E T
Addr
XXX
2AA
2AA
2AA
2AA
2AA
2AA
2AA
2AA
Am29LV200B
555
555
555
555
555
555
555
555
PA
Second
Data
PD
55
55
55
55
55
55
00
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 A16–A12 uniquely select any sector.
9. The data is 00h for an unprotected sector and 01h for a
10. The Unlock Bypass command is required prior to the Unlock
11. The Unlock Bypass Reset command is required to return to
12. The system may read and program in non-erasing sectors, or
13. The Erase Resume command is valid only during the Erase
protected sector. See “Autoselect Command Sequence” for
more information.
Bypass Program command.
reading array data when the device is in the unlock bypass
mode.
enter the autoselect mode, when in the Erase Suspend
mode. The Erase Suspend command is valid only during a
sector erase operation.
Suspend mode.
Addr
AAA
AAA
AAA
AAA
AAA
AAA
AAA
AAA
555
555
555
555
555
555
555
555
Bus Cycles (Notes 2–5)
Third
Data Addr
A0
90
90
90
90
20
80
80
(SA)
(SA)
AAA
AAA
X00
X01
X01
X02
X04
X02
X02
555
555
PA
Fourth
223B
22BF
XX00
XX01
Data
PD
AA
AA
3B
BF
01
00
01
Addr Data
2AA
2AA
555
555
Fifth
55
55
Addr
AAA
555
SA
Sixth
Data
10
30
19