mini51ZDE 使用内部22m spi的速率为多少

如题 

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

里面没有 速率的 描述