generic, half-duplex, DMA-assisted SPI host interface (G-SPI)..
The G-SPI supports a variety of simple address/data protocols over a standard G-SPI physical bus. The protocols
supported are differentiated by the number of address bits and data ordering.
Each transaction is initiated by assertion of the active low signal SCSn. Following the assertion of SCSn, the SDI
input is latched with every positive edge of SCLK. When data is output, it is clocked out with the negative edge of
SCLK. The clock input SCLK is low at the start and completion of a transaction. The interrupt output signal
(SINTn) is asserted by the card to interrupt the host. |
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