SST49LF020-33-4C-NH datasheet(10/38 Pages) SST

Part #	SST49LF020-33-4C-NH

Description	2 Megabit LPC Flash

Download	38 Pages

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Manufacturer	SST [Silicon Storage Technology, Inc]

Direct Link	http://www.sst.com/

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10

Advance Information

2 Megabit LPC Flash

SST49LF020

S71175-02-000

5/01

526

TABLE

3: OPERATION MODES SELECTION (PP MODE)

Mode

RST#

OE#

WE#

DQ

Address

Read

VIH

VIL

DOUT

AIN

Program

VIH

VIL

DIN

AIN

Erase

VIH

VIL

X1

Sector or Block address,

XXH for Chip-Erase

Reset

VIL

XX

High Z

X

Write Inhibit

VIH

X

VIL

VIH

VIL

X

High Z/DOUT

X

Product Identification

VIH

VIL

Manufacturer’s ID (BFH)

Device ID2

A18-A1=VIL, A0=VIL

A18-A1=VIL, A0=VIH

T3.2 526

1. X can be VIL or VIH, but no other value.

2. Device ID = 61H

TABLE

4: SOFTWARE COMMAND SEQUENCE

Command Sequence

1st1

Write Cycle

1. LPC Mode use consecutive Write cycles to complete a command sequence;

PP Mode use consecutive bus cycles to complete a command sequence.

2nd1

Write Cycle

3rd1

Write Cycle

4th1

Write Cycle

5th1

Write Cycle

6th1

Write Cycle

Addr2

2. Address format A14-A0 (Hex), Addresses A15-A21 can be VIL or VIH, but no other value, for the Command sequence in PP Mode.

Data

Addr2

Data

Addr2

Data

Addr2

Data

Addr2

Data

Addr2

Data

Byte-Program

5555H

AAH

2AAAH

55H

5555H

A0H

BA3

3. BA = Program Byte address

Data

Sector-Erase

5555H

AAH

2AAAH

55H

5555H

80H

5555H

AAH

2AAAH

55H

SAx4

4. SAx for Sector-Erase Address

30H

Block-Erase

5555H

AAH

2AAAH

55H

5555H

80H

5555H

AAH

2AAAH

55H

BAx5

5. BAx for Block-Erase Address

50H

Chip-Erase6

6. Chip-Erase is supported in PP Mode only

5555H

AAH

2AAAH

55H

5555H

80H

5555H

AAH

2AAAH

55H

5555H

10H

Software ID Entry7

7. With A17-A1=0; SST Manufacturer’s ID=BFH, is read with A0=0.

SST49LF020 Device ID = 61H, is read with A0=1.

5555H

AAH

2AAAH

55H

5555H

90H

Software ID Exit8

8. Both Software ID Exit operations are equivalent

XXH

F0H

Software ID Exit8

5555H

AAH

2AAAH

55H

5555H

F0H

T4.5 526

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