EN29LV641H/L EN29LV640U
COMMAND DEFINITIONS
The operations of the device are selected by one or more commands written into the command
register. Commands are made up of data sequences written at specific addresses via the
command register. The sequences for the specified operation are defined in the Command
Definitions table (Table 9). Incorrect addresses, incorrect data values or improper sequences will
reset the device to Read Mode.
Table 9. EN29LV641H/L / EN29LV640U Command Definitions
Bus Cycles (Note 1-2)
Command
Sequence
1st Cycle
2nd Cycle
Addr Data
3rd Cycle
Addr Data
4th Cycle
Addr Data
5th Cycle
Addr Data
6th Cycle
Addr Data
Addr
Data
RD
F0
Read (Note 3)
Reset
1
1
RA
xxx
000
100
7F
1C
Manufacturer ID
4
4
4
555
555
555
AA
AA
AA
2AA
2AA
2AA
55
55
55
555 90
555 90
555 90
Device ID
X01
22D7
Sector Protect
Verify (Note 4)
(SA)
X02
XX00
XX01
Program
4
3
2
2
6
6
1
1
1
555
555
XXX
XXX
555
555
BA
AA
AA
A0
90
2AA
2AA
PA
55
55
PD
00
55
55
555 A0
555 20
PA
PD
Unlock Bypass
Unlock Bypass
Program
Unlock Bypass Reset
Chip Erase
XXX
2AA
2AA
AA
AA
B0
30
555 80
555 80
555
555
AA
AA
2AA 55
2AA 55
555 10
Sector Erase
SA
30
Sector Erase Suspend
Sector Erase Resume
CFI Query
BA
55
98
Address and Data values indicated are in hex. Unless specified, all bus cycles are write cycles
RA = Read Address: address of the memory location to be read. This is a read cycle.
RD = Read Data: data read from location RA during Read operation. This is a read cycle.
PA = Program Address: address of the memory location to be programmed. X = Don’t-Care
PD = Program Data: data to be programmed at location PA
SA = Sector Address: address of the Sector to be erased or verified (in Autoselect mode).
Address bits A21-A15 uniquely select any Sector.
Notes:
1. Data bits DQ15-DQ8 are don’t care in command sequences, except for RD and PD.
2. Unless otherwise noted, address bits A21-A15 are don’t cares.
3. No unlock or command cycles required when device is in read mode.
4. The data is 00h for an unprotected sector group and 01h for a protected sector group.
This Data Sheet may be revised by subsequent versions
or modifications due to changes in technical specifications.
©2005 Eon Silicon Solution, Inc., www.essi.com.tw
17
Rev. B, Issue Date: 2005/06/27
EON [ EON SILICON SOLUTION INC. ]
