SST31LF021-70-4C-WH View Datasheet(PDF) - Silicon Storage Technology

Part Name

Description

Manufacturer

SST31LF021-70-4C-WH

2 Mbit Flash + 1 Mbit SRAM ComboMemory

Silicon Storage Technology 

EOL Data Sheet

2 Mbit Flash + 1 Mbit SRAM ComboMemory

SST31LF021 / SST31LF021E

ADDRESS A17-0

BES#

SIX-BYTE CODE FOR BANK-ERASE

5555 2AAA

5555

5555

2AAA

5555

TSBE

BEF#

OE#

WE#

TWP

DQ7-0

AA

55

80

AA

55

10

SW0

SW1

SW2

SW3

SW4

SW5

Note: The device also supports BEF# controlled Bank-Erase operation. The WE# and BEF# signals are

interchangeable as long as minimum timings are met. (See Table 12)

FIGURE 10: WE# CONTROLLED FLASH BANK-ERASE TIMING DIAGRAM

1137 F17.1

ADDRESS A14-0

THREE-BYTE SEQUENCE FOR

SOFTWARE ID ENTRY

5555

2AAA

5555

BES#

0000

0001

BEF#

OE#

WE#

DQ7-0

TWP

TIDA

AA

SW0

TWPH

55

90

SW1

SW2

TAA

BF DEVICE ID

MFG ID

Device ID = 18H for SST31LF021 and 19H for SST31LF021E.

FIGURE 11: FLASH SOFTWARE ID ENTRY AND READ

©2007 Silicon Storage Technology, Inc.

16

1137 F09.5

S71137-06-EOL

05/07

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