![VersaLogic Komodo VL-EPICs-36 Скачать руководство пользователя страница 51](http://html1.mh-extra.com/html/versalogic/komodo-vl-epics-36/komodo-vl-epics-36_reference-manual_1006803051.webp)
Interfaces and Connectors
VL-EPICs-36 Reference Manual
45
SPIDATA0 (READ/WRITE) CAAh (or C9Ah)
D7
D6
D5
D4
D3
D2
D1
D0
MSbit
LSbit
SPIDATA1 (READ/WRITE) CABh (or C9Bh)
D7
D6
D5
D4
D3
D2
D1
D0
MSbit
LSbit
SPIDATA2 (READ/WRITE) CACh (or C9Ch)
D7
D6
D5
D4
D3
D2
D1
D0
MSbit
LSbit
SPIDATA3 (READ/WRITE) CADh (or C9Dh)
D7
D6
D5
D4
D3
D2
D1
D0
MSbit
LSbit
SPIDATA3 contains the most significant byte (MSB) of the SPI data word. A write to this
register will initiate the SPI clock and, if the MAN_SS bit = 0, will also assert a slave select to
begin an SPI bus transaction. Increasing frame sizes from 8-bit use the lowest address for the
least significant byte of the SPI data word; for example, the LSB of a 24-bit frame would be
SPIDATA1. Data is sent according to the LSBIT_1ST setting. When LSBIT_1ST = 0, the MSbit
of SPIDATA3 is sent first, and received data will be shifted into the LSbit of the selected frame
size set in the SPILEN field. When LSBIT_1ST = 1, the LSbit of the selected frame size is sent
first, and the received data will be shifted into the MSbit of SPIDATA3.