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SST32HF402-70-4E-L3K Datasheet(PDF) 5 Page - Silicon Storage Technology, Inc |
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SST32HF402-70-4E-L3K Datasheet(HTML) 5 Page - Silicon Storage Technology, Inc |
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5 / 30 page  Data Sheet Multi-Purpose Flash (MPF) + SRAM ComboMemory SST32HF202 / SST32HF402 / SST32HF802 5 ©2005 Silicon Storage Technology, Inc. S71209-06-000 5/05 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. 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. TABLE 1: PRODUCT IDENTIFICATION Address Data Manufacturer’s ID 0000H 00BFH Device ID SST32HF202 0001H 2789H SST32HF402 0001H 2780H SST32HF802 0001H 2781H T1.2 1209 I/O Buffers 1209 B1.0 Address Buffers DQ15 - DQ8 AMS-A0 WE# SuperFlash Memory SRAM Control Logic BES# BEF# OE# Address Buffers & Latches LBS# UBS# DQ7 - DQ0 FUNCTIONAL BLOCK DIAGRAM |
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