SST31LF021(2001) データシートの表示（PDF） - Silicon Storage Technology

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SST31LF021
(Rev.:2001)

2 Mbit Flash + 1 Mbit SRAM ComboMemory

Silicon Storage Technology 

2 Mbit Flash + 1 Mbit SRAM ComboMemory

SST31LF021 / SST31LF021E

Data Sheet

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

392 ILL F17.1

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

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

©2001 Silicon Storage Technology, Inc.

15

392 ILL F09.5

S71137-03-000 10/01 392

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