2 Mbit Page-Mode EEPROM
SST29EE020 / SST29LE020 / SST29VE020
Data Sheet
TABLE 3: OPERATION MODES SELECTION
Mode
CE# OE# WE# DQ
Address
Read
VIL
VIL
VIH
X
VIL
VIH
X1
VIH
VIL
X
DOUT
DIN
AIN
AIN
X
Page-Write
Standby
Write Inhibit
High Z
VIL
X
X
High Z/ DOUT
High Z/ DOUT
DIN
X
X
VIH
VIL
X
Software Chip-Erase
Product Identification
Software Mode
VIL
VIH
AIN, See Table 4
VIL
VIH
VIL
Manufacturer’s ID (BFH)
Device ID2
See Table 4
SDP Enable Mode
SDP Disable Mode
VIL
VIL
VIH
VIH
VIL
VIL
See Table 4
See Table 4
T3.3 307
1. X can be VIL or VIH, but no other value
2. Device ID = 10H for SST29EE020 and 12H for SST29LE/VE020
TABLE 4: SOFTWARE COMMAND SEQUENCE
Command
Sequence
1st Bus
Write Cycle
2nd Bus
Write Cycle
3rd Bus
Write Cycle
4th Bus
Write Cycle
5th Bus
Write Cycle
6th Bus
Write Cycle
Addr1 Data Addr1 Data Addr1 Data Addr1 Data Addr1 Data Addr1 Data
5555H AAH 2AAAH 55H 5555H A0H
Addr2 Data
Software
Data Protect Enable
& Page-Write
Software
5555H AAH 2AAAH 55H 5555H 80H 5555H AAH 2AAAH 55H 5555H 20H
Data Protect Disable
Software Chip-Erase3 5555H AAH 2AAAH 55H 5555H 80H 5555H AAH 2AAAH 55H 5555H 10H
Software ID Entry4,5
5555H AAH 2AAAH 55H 5555H 90H
Software ID Exit
5555H AAH 2AAAH 55H 5555H F0H
Alternate
Software ID Entry6
5555H AAH 2AAAH 55H 5555H 80H 5555H AAH 2AAAH 55H 5555H 60H
T4.2 307
1. Address format A14-A0 (Hex), Address A15 can be VIL or VIH, but no other value.
2. Page-Write consists of loading up to 128 Bytes (A6-A0)
3. The software Chip-Erase function is not supported by the industrial temperature part.
Please contact SST if you require this function for an industrial temperature part.
4. The device does not remain in Software Product ID Mode if powered down.
5. With A14-A1 =0; SST Manufacturer’s ID= BFH, is read with A0 = 0,
SST29EE020 Device ID = 10H, is read with A0 = 1
SST29LE/VE020 Device ID = 12H, is read with A0 = 1
6. Alternate six-byte Software Product ID Command Code
Note: This product supports both the JEDEC standard three-byte command code sequence and SST’s original six-byte command code
sequence. For new designs, SST recommends that the three-byte command code sequence be used.
©2001 Silicon Storage Technology, Inc.
S71062-06-000 6/01 307
6
SST [ SILICON STORAGE TECHNOLOGY, INC ]
