TMP92CF30
2009-06-12
92CF30-464
Transmit and Receive Operation
When performing a data transmission and reception simultaneously, the FDPXE bit
must be set to “1”.
Write a “1” to the SPICT<RXE> bit after writing a “1” to the FDPXE bit to put the
receiver into standby mode for the UNIT-mode reception. Writing a “1” to the SPICT<RXE>
bit after writing a “1” to the <FDPXE> bit does not immediately initiate the receive
operation. This is because the data to be transmitted at the same time has not been
prepared. Transmit and receive operation is started only after the transmit data is written
into the SPITD register where SPICT<TXE> = “1”.
The figure below shows the operations of the receiver and transmitter for the
simultaneous transmit and receive operation. :
Note: If the data transmission and reception are not performed simultaneously, data communication should be
performed with the FDPXE bit cleared to “0”.
Figure 3.17.8 Transmit and Receive Operation
Receiver
SPCLK output
SPDI input
Bit 1
Bit 2
Bit 3
Bit 4
Bit 0
LSB
Bit 5
Bit 6
Bit 7
SPCLK output
SPDO output
Transmitter
Bit 1
Bit 2
Bit 3
Bit 4
LSB
Bit 5 Bit 6
Start
receiving
Start
transmitting
Содержание TLCS-900/H1 Series
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