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Table 13-4. SPI 1 Interrupt Control/Status Register Description (Continued)
Name
TEEN
TxFIFO Empty Interrupt Enable—This bit,
Bit 8
when set, causes an interrupt to be generated
when the TxFIFO buffer is empty and the TE bit
is set.
BO
Bit Count Overflow—This bit is set when the
Bit 7
SPI is in "slave SPI FIFO advanced by SS rising
edge" mode and the slave is receiving more than
16 bits in one burst. This bit is cleared after a
data read from the SPIRXD register.
Note: There is nothing to indicate which data
word has overflowed; hence, the bad data word
may still be in the FIFO if it is not empty.
RO
RxFIFO Overflow—This bit indicates that the
Bit 6
RxFIFO has overflowed and at least 1 data word
is has been overwritten. The RO flag is automat-
ically cleared after a data read.
RF
RxFIFO Full Status—This bit, when set, indi-
Bit 5
cates that there are 8 data words in RxFIFO.
RH
RxFIFO Half Status—This bit, when set, indi-
Bit 4
cates the contents of the RxFIFO is more than or
equal to 4 data words.
RR
RxFIFO Data Ready Status—This bit, when
Bit 3
set, indicates that at least 1 data word is ready in
the Rx FIFO.
TF
TxFIFO Full Status—This bit, when set, indi-
Bit 2
cates there are 8 data words in the TxFIFO.
TH
TxFIFO Half Status—This bit, when set, indi-
Bit 1
cates that the contents of the TxFIFO is more
than or equal to 4 data words.
TE
TxFIFO Empty Status—This bit, when set,
Bit 0
causes an interrupt to be generated when the
TxFIFO buffer is empty and the TEEN bit is set.
Note: When the FIFO is empty, data shifting
may still be ongoing. To ensure no data
transaction is ongoing, read the XCH bit in
control register.
Description
Serial Peripheral Interface 1 and 2
SPI 1 Programming Model
Setting
0 = Disable TxFIFO empty interrupt.
1 = Enable TxFIFO empty interrupt.
0 = No bit count overflow.
1 = At least 1 data word in RxFIFO has bit
count overflow error.
0 = RxFIFO has not overflowed.
1 = RxFIFO has overflowed. At least 1 data
word in the RxFIFO is overwritten.
0 = Less than 8 data words in RxFIFO.
1 = 8 data words in RxFIFO.
0 = Contents of RxFIFO is less than 4 data
words.
1 = Contents of RxFIFO is greater than or
equal to 4 data words.
0 = RxFIFO is empty.
1 = At least 1 data word is ready in the
RxFIFO.
0 = Less than 8 data words in TxFIFO.
1 = 8 data words in TxFIFO.
0 = Less than four empty slots in TxFIFO.
1 = More than or equal to four empty slots in
TxFIFO.
0 = At least 1 data word is in Tx FIFO.
1 = TxFIFO is empty.
13-9
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