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GD25S512MDBJS датащи(PDF) 48 Page - GigaDevice Semiconductor (Beijing) Inc. |
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GD25S512MDBJS датащи(HTML) 48 Page - GigaDevice Semiconductor (Beijing) Inc. |
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48 / 87 page ![]() 3.3V Uniform Sector Dual and Quad Serial Flash GD25S512MD 48 7.24. Read Unique ID (4BH) The Read Unique ID command accesses a factory-set read-only 128bit number that is unique to each device. The Unique ID can be used in conjunction with user software methods to help prevent copying or cloning of a system. The Read Unique ID command sequence in 3 Byte mode (ADS=0): CS# goes low sending Read Unique ID command Dummy Byte1 Dummy Byte2 Dummy Byte3 Dummy Byte4128bit Unique ID Out CS# goes high. The Read Unique ID command sequence in 4 Byte mode (ADS=0): CS# goes low sending Read Unique ID command Dummy Byte1 Dummy Byte2 Dummy Byte3 Dummy Byte4 Dummy Byte5128bit Unique ID Out CS# goes high. Figure 49 Read Unique ID Sequence Diagram (ADS=0) Command 0 1 2 3 4 5 6 7 4BH CS# SCLK SI SO High-Z 8 9 10 3 2 1 0 7 6 5 4-Byte Dummy MSB 6 5 4 3 2 1 0 Data Out1 7 6 5 7 Data Out2 CS# SCLK SI SO MSB 42 43 44 45 41 46 47 40 36 37 38 39 Figure 50 Read Unique ID Sequence Diagram (ADS=1) Command 0 1 2 3 4 5 6 7 4BH CS# SCLK SI SO High-Z 8 9 10 44 45 46 47 3 2 1 0 7 6 5 5-Byte Dummy MSB 6 5 4 3 2 1 0 Data Out1 50 51 52 53 49 54 55 48 7 6 5 7 Data Out2 CS# SCLK SI SO MSB |
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