SST32HF802-70-4C-L3K データシートの表示（PDF） - Silicon Storage Technology

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SST32HF802-70-4C-L3K

Multi-Purpose Flash (MPF) + SRAM ComboMemory

Silicon Storage Technology 

Multi-Purpose Flash (MPF) + SRAM ComboMemory

SST32HF202 / SST32HF402 / SST32HF802

Data Sheet

Product Identification

The Product Identification mode identifies the devices as

the SST32HF202/402/802 and manufacturer as SST. This

mode may be accessed by software operations only.

The hardware device ID Read operation, which is typi-

cally used by programmers, cannot be used on this

device because of the shared lines between flash and

SRAM in the multi-chip package. Therefore, applica-

tion of high voltage to pin A9 may damage this device.

Users may use the software Product Identification opera-

tion to identify the part (i.e., using the device ID) when using

multiple manufacturers in the same socket. For details, see

Tables 3 and 4 for software operation, Figure 14 for the

software ID entry and Read timing diagram, and Figure 20

for the ID entry command sequence flowchart.

TABLE 1: PRODUCT IDENTIFICATION

Manufacturer’s ID

Device ID

SST32HF202

SST32HF402

SST32HF802

Address

0000H

0001H

0001H

0001H

Data

00BFH

2789H

2780H

2781H

T1.2 1209

Product Identification Mode Exit/Reset

In order to return to the standard read mode, the Software

Product Identification mode must be exited. Exiting is

accomplished by issuing the Exit ID command sequence,

which returns the device to the Read operation. Please

note that the software reset command is ignored during an

internal Program or Erase operation. See Table 4 for soft-

ware command codes, Figure 15 for timing waveform and

Figure 20 for a flowchart.

Design Considerations

SST recommends a high frequency 0.1 µF ceramic capac-

itor to be placed as close as possible between VDD and

VSS, e.g., less than 1 cm away from the VDD pin of the

device. Additionally, a low frequency 4.7 µF electrolytic

capacitor from VDD to VSS should be placed within 1 cm of

the VDD pin.

FUNCTIONAL BLOCK DIAGRAM

Address Buffers

SRAM

AMS-A0

UBS#

LBS#

BES#

BEF#

OE#

WE#

Control Logic

I/O Buffers

DQ15 - DQ8

DQ7 - DQ0

Address Buffers

& Latches

SuperFlash

Memory

1209 B1.0

©2005 Silicon Storage Technology, Inc.

5

S71209-06-000

5/05

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