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AT25SL641 bảng dữ liệu(PDF) 24 Page - Dialog Semiconductor |
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AT25SL641 bảng dữ liệu(HTML) 24 Page - Dialog Semiconductor |
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24 / 76 page ![]() 23 AT25SL641 DS-25SL641–113F–12/2018 Figure 7-10. Set Read Parameters Instruction (QPI Mode) 7.9 Read Data (03h) The Read Data instruction is used to read data out from the device. The instruction is initiated by driving the CS pin low and then sending the instruction code 03h, followed by a 24-bit address (A23- A0), onto the SI pin. After the address is received, the data byte of the addressed memory location is shifted out on the SO pin at the falling edge of SCK with the most significant bit (MSB) first. The address is automatically incremented to the next higher address and the next byte of data is shifted out, allowing for a continuous stream of data. This means that the entire memory can be accessed with a single instruction as long as the clock continues. The instruction is completed by driving CS high. The Read Data instruction sequence is shown in Figure 7-11. If a Read Data instruction is issued while an Erase, Program or Write Status Register cycle is in process (BUSY = 1) the instruction is ignored Table 7-6. Encoding of the P[5:4] Bits P5, P4 Dummy Clocks Maximum Read Frequency 00 4 80 MHz 01 4 80 MHz 10 6 104 MHz 11 8 133 MHz Table 7-7. Encoding of the P[1:0] Bits P1, P0 Wrap Length 0 0 8-byte 0 1 16-byte 1 0 32-byte 1 1 64-byte |
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