en29lv800bt-90tip Eon Silicon Solution Inc., en29lv800bt-90tip Datasheet - Page 11

• Manufacturer Part Number: en29lv800bt-90tip
• Description: 8 Megabit 1024k X 8-bit / 512k X 16-bit Flash Memory Boot Sector Flash Memory, Cmos 3.0 Volt-only
• Manufacturer: Eon Silicon Solution Inc.

COMMAND DEFINITIONS
The operations of EN29LV800B 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. EN29LV800B 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-A12 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
Top Boot
Device ID
Bottom Boot
Sector Protect
Verify
Command
Sequence
Word
Byte
Word
Byte
Word
Byte
Word
Byte
Word
Byte
Word
Byte
Word
Byte
1
1
4
4
4
4
4
6
6
1
1
Addr
RA
xxx
555
AAA
555
AAA
555
AAA
555
AAA
555
AAA
555
AAA
555
AAA
xxx
xxx
Cycle
1
st
Data
RD
F0
AA
AA
AA
AA
AA
AA
AA
B0
30
Rev. H, Issue Date: 2008/07/07
Addr
2AA
555
2AA
555
2AA
555
2AA
555
2AA
555
2AA
555
2AA
555
Cycle
2
11
nd
Data
55
55
55
55
55
55
55
©2004 Eon Silicon Solution, Inc., www.essi.com.tw
Addr
555
AAA
555
AAA
555
AAA
555
AAA
555
AAA
555
AAA
555
AAA
Cycle
3
rd
Data
90
90
90
90
A0
80
80
Bus Cycles
Addr
000/
100
000/
200
X01
X02
X01
X02
(SA)
X02
(SA)
X04
PA
555
AAA
555
AAA
Cycle
4
EN29LV800B
th
Data
7F/
1C
7F/
1C
22DA
DA
225B
5B
XX00
XX01
00
01
PD
AA
AA
Addr
2AA
555
2AA
555
Cycle
5
th
Data
55
55
555
Addr
AAA
SA
Cycle
6
th
Data
10
30