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CAT25020LI-GT3 数据表(PDF) 7 Page - Catalyst Semiconductor |
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CAT25020LI-GT3 数据表(HTML) 7 Page - Catalyst Semiconductor |
7 / 17 page CAT25010, CAT25020, CAT25040 © Catalyst Semiconductor, Inc. 7 Doc. No. MD-1006 Rev. T Characteristics subject to change without notice Byte Write Once the WEL bit is set, the user may execute a write sequence, by sending a WRITE instruction, a 8-bit address and data as shown in Figure 4. For the CAT25040, bit 3 of the write instruction opcode contains A8 address bit. Internal programming will start after the low to high CS ¯¯ transition. During an internal write cycle, all commands, except for RDSR (Read Status Register) will be ignored. The RDY ¯¯¯¯ bit will indicate if the internal write cycle is in progress (RDY ¯¯¯¯ high), or the the device is ready to accept commands (RDY ¯¯¯¯ low). Page Write After sending the first data byte to the CAT25010/20/40, the host may continue sending data, up to a total of 16 bytes, according to timing shown in Figure 5. After each data byte, the lower order address bits are automatically incremented, while the higher order address bits (page address) remain unchanged. If during this process the end of page is exceeded, then loading will “roll over” to the first byte in the page, thus possibly overwriting previoualy loaded data. Following completion of the write cycle, the CAT25010/20/40 is automatically returned to the write disable state. Figure 4. Byte WRITE Timing Notes: Dashed Line = mode (1, 1) - - - - - - * X = 0 for CAT25010, CAT25020. x = A8 for CAT25040 Figure 5. Page WRITE Timing Notes: Dashed Line = mode (1, 1) - - - - - - * X = 0 for CAT25010, CAT25020. x = A8 for CAT25040 SCK SI SO 00 0 0 X* 0 1 0 D7 D6 D5 D4 D3 D2 D1 D0 012345678 CS OPCODE DATA IN HIGH IMPEDANCE BYTE ADDRESS A7 A0 13 14 15 16 17 18 19 20 21 22 23 SCK SI SO 00 00 X* 0 1 0 BYTE ADDRESS Data Byte 1 01234 5678 13 14 15 16-23 24-31 Data Byte 2 Data Byte 3 Data Byte N CS OPCODE 7..1 0 16+(N-1)x8-1..16+(N-1)x8 16+Nx8-1 DATA IN HIGH IMPEDANCE A7 A0 |
类似零件编号 - CAT25020LI-GT3 |
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类似说明 - CAT25020LI-GT3 |
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