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SST25VF016B-50-4C-S2AF Datasheet(PDF) 4 Page - Silicon Storage Technology, Inc |
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SST25VF016B-50-4C-S2AF Datasheet(HTML) 4 Page - Silicon Storage Technology, Inc |
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4 / 28 page  4 Data Sheet 16 Mbit SPI Serial Flash SST25VF016B ©2006 Silicon Storage Technology, Inc. S71271-02-000 1/06 MEMORY ORGANIZATION The SST25VF016B SuperFlash memory array is orga- nized in uniform 4 KByte erasable sectors with 32 KByte overlay blocks and 64 KByte overlay erasable blocks. DEVICE OPERATION The SST25VF016B is accessed through the SPI (Serial Peripheral Interface) bus compatible protocol. The SPI bus consist of four control lines; Chip Enable (CE#) is used to select the device, and data is accessed through the Serial Data Input (SI), Serial Data Output (SO), and Serial Clock (SCK). The SST25VF016B supports both Mode 0 (0,0) and Mode 3 (1,1) of SPI bus operations. The difference between the two modes, as shown in Figure 2, is the state of the SCK signal when the bus master is in Stand-by mode and no data is being transferred. The SCK signal is low for Mode 0 and SCK signal is high for Mode 3. For both modes, the Serial Data In (SI) is sampled at the rising edge of the SCK clock signal and the Serial Data Output (SO) is driven after the falling edge of the SCK clock signal. FIGURE 2: SPI PROTOCOL 1271 SPIprot.0 MODE 3 SCK SI SO CE# MODE 3 DON'T CARE Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 MODE 0 MODE 0 HIGH IMPEDANCE MSB MSB |
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