EN29LV040A-55RPIP EON [Eon Silicon Solution Inc.], EN29LV040A-55RPIP Datasheet - Page 9

• Manufacturer Part Number: EN29LV040A-55RPIP
• Description: 4 Megabit (512K x 8-bit ) Uniform Sector, CMOS 3.0 Volt-only Flash Memory
• Manufacturer: EON [Eon Silicon Solution Inc.]

COMMAND DEFINITIONS
The operations of the EN29LV040A are selected by one or more commands written into the
command register to perform Read/Reset Memory, Read ID, Read Sector Protection, Program,
Sector Erase, Chip Erase, Erase Suspend and Erase Resume. 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 5). Incorrect addresses, incorrect data
values or improper sequences will reset the device to Read Mode.
Table 5. EN29LV040A Command Definitions
Read
Reset
Program
Chip Erase
Sector Erase
Erase Suspend
Erase Resume
Address and Data values indicated in hex
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. Address bits A18-A16 uniquely select any Sector.
Reading Array Data
The device is automatically set to reading array data after power up. No commands are required to retrieve
data. The device is also ready to read array data after completing an Embedded Program or Embedded
Erase algorithm.
Following an Erase Suspend command, Erase Suspend mode is entered. The system can read array data
using the standard read timings, with the only difference in that if it reads at an address within erase
suspended sectors, the device outputs status data. After completing a programming operation in the Erase
Suspend mode, the system may once again read array data with the same exception.
The Reset command must be issued to re-enable the device for reading array data if DQ5 goes high, or while
in the autoselect mode. See next section for details on Reset.
This Data Sheet may be revised by subsequent versions
or modifications due to changes in technical specifications.
Manufacturer ID
Device ID
Sector Protect Verify
Command
Sequence
1
1
4
4
4
4
6
6
1
1
Add
RA
Xxx
555
555
555
555
555
555
xxx
xxx
Cycle
1
st
Data
RD
F0
AA
AA
AA
AA
AA
AA
B0
30
Rev. E, Issue Date: 2011/10/27
Add
2AA
2AA
2AA
2AA
2AA
2AA
Cycle
2
nd
55
9
Data
55
55
55
55
55
Add
555
555
555
555
555
555
© 2003 Eon Silicon Solution, Inc.,
Cycle
3
rd
Data
90
90
90
A0
80
80
Bus Cycles
Add
000
100
X01
(SA)
X02
PA
555
555
Cycle
4
th
Data
7F
1C
4F
00/
01
PD
AA
AA
EN29LV040A
Add
2AA
2AA
Cycle
www.eonssi.com
5
th
Data
55
55
Add
555
SA
Cycle
6
th
Data
10
30