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MX23L3254MC-20 Datasheet(PDF) 7 Page - Macronix International |
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MX23L3254MC-20 Datasheet(HTML) 7 Page - Macronix International |
7 / 18 page 7 P/N: PM1167 REV. 1.2, JUN. 08, 2005 MX23L3254 Figure 4. Read Data Bytes (READ) Instruction Sequence and Data-Out Sequence Read Data Bytes (READ) The device is first selected by driving Chip Select (S#) Low. The instruction code for the Read Data Bytes (READ) instruction is followed by a 3-byte address (A23-A0), each bit being latched-in during the rising edge of Serial Clock (C). Then the memory contents, at that address, is shifted out on Serial Data Output (Q), each bit being shifted out, at a maximum frequency fR, during the falling edge of Serial Clock (C). The instruction sequence is shown in Figure 4. The first byte addressed can be at any location. The address is automatically incremented to the next higher address after each byte of data is shifted out. The whole memory can, therefore, be read with a single Read Data Bytes (READ) instruction.When the highest address is reached, the address counter rolls over to 000000h, allowing the read sequence to be continued indefinitely. The Read Data Bytes (READ) instruction is terminated by driving Chip Select (S#) High. Chip Select (S#) can be driven High at any time during data output. Note: 1. Address bits A23,A22 is Don't Care. C D S# Q 23 2 1 3456789 10 28 29 30 31 32 33 34 35 22 21 3210 36 37 38 76543 1 7 0 High Impedance Data Out 1 Instruction 24-Bit Address 0 MSB MSB 2 39 Data Out 2 |
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