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数据手册里没写 One SPI devices Supports Master/Slave mode Full-duplex synchronous serial data transfer Provides 3-wire function Mini51 Jul. 18, 2016 Page 13 of 376 Revision 1.03 ™ DE SERIES TECHNICAL REFERENCE MANUAL Variable length of transfer data from 8 to 32 bits MSB or LSB first data transfer Rx latching data can be either at rising edge or at falling edge of serial clock Tx sending data can be either at rising edge or at falling edge of serial clock Supports Byte Suspend mode in 32-bit transmission 4-level depth FIFO buffe
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