SST32HF202 查看數據表（PDF） - Silicon Storage Technology
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SST32HF202 Datasheet PDF : 26 Pages
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Multi-Purpose Flash (MPF) + SRAM ComboMemory
SST32HF201 / SST32HF202 / SST32HF401 / SST32HF402
Preliminary Specifications
TABLE 2: PIN DESCRIPTION
Symbol
AMS1-A0
Pin Name
Address Inputs
DQ15-DQ0 Data Input/output
BES#
BEF#
OE#
WE#
VDD
VSS
UBS#
LBS#
NC
SRAM Memory Bank Enable
Flash Memory Bank Enable
Output Enable
Write Enable
Power Supply
Ground
Upper Byte Control (SRAM)
Lower Byte Control (SRAM)
No Connection
1. AMS = Most significant address
Functions
To provide flash addresses, A16-A0 for 2M and A17-A0 for 4M.
To provide SRAM addresses, A15-A0 for 1M and A16-A0 for 2M.
To output data during Read cycles and receive input data during Write cycles.
Data is internally latched during a flash Erase/Program cycle.
The outputs are in tri-state when OE# or BES# and BEF# are high.
To activate the SRAM memory bank when BES# is low.
To activate the Flash memory bank when BEF# is low.
To gate the data output buffers.
To control the Write operations.
2.7-3.3V power supply
To enable DQ15-DQ8
To enable DQ7-DQ0
Unconnected Pins
T2.0 557
TABLE 3: OPERATION MODES SELECTION
Mode
Not Allowed
Flash
BES#1 BEF#1 OE# WE# UBS# LBS# DQ15 to DQ8 DQ7 to DQ0
VIL
VIL
X2
X
X
X
X
X
Address
X
Read
Program
Erase
VIH
VIL
VIL VIH
X
X
VIH
VIL VIH VIL
X
X
X
VIL
VIH VIL
X
X
DOUT
DIN
X
DOUT
DIN
X
AIN
AIN
Sector or Block address,
XXH for Chip-Erase
SRAM
Read
VIL
VIH
VIL VIH
VIL
VIL
DOUT
DOUT
AIN
VIL
VIH
VIL VIH
VIL
VIH
DOUT
High Z
AIN
VIL
VIH
VIL VIH VIH
VIL
High Z
DOUT
AIN
Write
VIL
VIH
X
VIL
VIL
VIL
DIN
DIN
AIN
VIL
VIH
X
VIL
VIL
VIH
DIN
High Z
AIN
VIL
VIH
X
VIL
VIH
VIL
High Z
DIN
AIN
Standby
VIHC
VIHC
X
X
X
X
High Z
High Z
X
Flash Write Inhibit
X
X
VIL X
X
X High Z / DOUT High Z / DOUT
X
X
X
X VIH
X
X High Z / DOUT High Z / DOUT
X
X
VIH
X
X
X
X High Z / DOUT High Z / DOUT
X
Output Disable
VIH
VIL VIH VIH
X
X
High Z
High Z
X
VIL
VIH
X
X
VIH
VIH
High Z
High Z
X
VIL
VIH VIH VIH
X
X
High Z
High Z
X
Product Identification
Software Mode
VIH
VIL
VIL VIH
X
X
Manufacturer’s ID (00BFH) AMSF4-A1=VIL, A0=VIH
Device ID3
(See Table 4)
1. Do not apply BES#=VIL and BEF#=VIL at the same time
2. X can be VIL or VIH, but no other value.
3. Device ID for: SST32HF201/202 = 2789H and SST32HF401/402 = 2780H
4. AMS = Most significant flash address
T3.2 557
©2001 Silicon Storage Technology, Inc.
6
S71209-00-000 9/01 557
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