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EM260-RTR 数据表(PDF) 30 Page - Silicon image |
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EM260-RTR 数据表(HTML) 30 Page - Silicon image |
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30 / 50 page EM260 120-0260-000M Rev 1.1 Page 30 5.7.1 SPI Protocol Version Figure 9. SPI Protocol Version Example 1. Activate Slave Select (nSSEL). 2. Transmit the command 0x0A - SPI Protocol Version Request. 3. Transmit the Frame Terminator, 0xA7. 4. Wait for nHOST_INT to assert. 5. Transmit and receive 0xFF until a byte other than 0xFF is received. 6. Receive response 0x82 (a byte other than 0xFF), then receive the Frame Terminator, 0xA7. 7. Bit 7 is always set and bit 6 is always cleared in the Version Response, so this is Version 2. 8. Deactivate Slave Select. 0x82 0xA7 0x0A 0xA7 nSSEL MISO MOSI SCLK nHOST_INT Cmd Wait Resp |
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