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MAXQ3180-RAN+ 数据表(PDF) 25 Page - Maxim Integrated Products |
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MAXQ3180-RAN+ 数据表(HTML) 25 Page - Maxim Integrated Products |
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25 / 101 page ![]() Low-Power, Multifunction, Polyphase AFE ______________________________________________________________________________________ 25 READ MAXQ3180 SEND COMMAND BYTE 1 GET 0xC1? GET 0xC2? EXIT SPI TIMEOUT (320ms) DELAY > 400 SYSCLK SEND COMMAND BYTE 2 SEND 0x00 DELAY > 400 SYSCLK SEND 0x00 GET DATA BYTE DELAY > 400 SYSCLK GET 0x4E? GET 0x41? DONE? N N N Y N WRITE MAXQ3180 SEND COMMAND BYTE 1 GET 0xC1? GET 0xC2? EXIT SPI TIMEOUT (320ms) DELAY > 400 SYSCLK SEND COMMAND BYTE 2 SEND DATA BYTE DELAY > 400 SYSCLK SEND 0x00 DELAY > 400 SYSCLK GET 0x4E? GET 0x41? DONE? GET 0x41? N N N N Y N Figure 8. Flowchart for Writing to MAXQ3180 Figure 7. Flowchart for Reading from MAXQ3180 Register Set Data and device command and control information are located in internal registers. Registers range from 8 to 64 bits in length and are divided into RAM-based registers and virtual registers. The RAM-based registers contain both operating parameters and measurement results. The virtual registers contain calculated values derived from one or more real registers. They are calculated at the time they are requested, and thus can involve addi- tional time to return a value. Most virtual registers are 8 bytes in length and are delivered least significant byte first. |
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