SST31LF041 查看數據表（PDF） - Silicon Storage Technology
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SST31LF041 Datasheet PDF : 26 Pages
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4 Mbit Flash + 1 Mbit or 256 Kbit SRAM ComboMemory
SST31LF041 / SST31LF041A / SST31LF043 / SST31LF043A
Data Sheet
TABLE 3: OPERATION MODES SELECTION
Mode
Flash
Read
Program
Erase
BES#1 BEF#1 OE# WE# A9 DQ
X2
VIL
VIL
VIH AIN DOUT
X
VIL
VIH
VIL AIN DIN
X
VIL
VIH
VIL X X
Address
AIN
AIN
Sector address,
XXH for Bank-Erase
SRAM
Read
VIL
VIH
VIL
VIH AIN DOUT
AIN
Write
VIL
VIH
X
VIL AIN DIN
AIN
Standby
VIHC
VIHC
X
X X High Z
X
Flash Write Inhibit
X
X
VIL
X
X High Z / DOUT
X
X
X
X
VIH X High Z / DOUT
X
X
VIH
X
X
X High Z / DOUT
X
Product Identification
Hardware Mode
X
VIL
VIL
VIH VH Manufacturer’s ID (BFH)
A18-A1=VIL, A0=VIL
Device ID3
A18-A1=VIL, A0=VIH
Software Mode
X
VIL
VIL
VIH AIN ID Code
See Table 4
1. BES# and BEF# cannot be asserted simultaneously. For SST31LF041A/043A BES# and OE# share pin 32.
When flash is active, pin 32 becomes OE#. When flash is inactive, pin 32 becomes BES#.
2. X can be VIL or VIH, but no other value.
3. Device ID 17H for SST31LF041, 16H for SST31LF041A, 65H for SST31LF043 and 66H for SST31LF043A.
T3.9 349
TABLE 4: SOFTWARE COMMAND SEQUENCE
Command
Sequence
1st Bus
Write Cycle
Addr1 Data
Byte-Program
5555H AAH
Sector-Erase
5555H AAH
Bank-Erase
5555H AAH
Software ID Entry4,5 5555H AAH
Software ID Exit
5555H AAH
2nd Bus
Write Cycle
Addr1 Data
2AAAH 55H
2AAAH 55H
2AAAH 55H
2AAAH 55H
2AAAH 55H
3rd Bus
Write Cycle
Addr1 Data
5555H A0H
5555H 80H
5555H 80H
5555H 90H
5555H F0H
4th Bus
Write Cycle
Addr1 Data
BA2 Data
5555H AAH
5555H AAH
5th Bus
Write Cycle
Addr1 Data
2AAAH 55H
2AAAH 55H
1. Address format A14-A0 (Hex),Address A15-A18 can be VIL or VIH, but no other value, for the Command sequence.
2. BA = Program Byte address
3. SAX for Sector-Erase; uses A18-A12 address lines
4. The device does not remain in Software Product ID Mode if powered down.
5. With A18-A1 =0; SST Manufacturer’s ID= BFH, is read with A0 = 0,
SST31LF041 Device ID = 17H, is read with A0 = 1,
SST31LF041A Device ID = 16H, is read with A0 = 1
SST31LF043 Device ID = 65H, is read with A0 = 1
SST31LF043A Device ID = 66H, is read with A0 = 1
6th Bus
Write Cycle
Addr1 Data
SAX3 30H
5555H 10H
T4.7 349
©2001 Silicon Storage Technology, Inc.
7
S71107-03-000 5/01 349
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