Lantronix DSTni-EX - Manual (Page 16)

8
SPI_STAT Register
To clear a bit in the SPI_STAT register, write a 1 to that bit.
Table 2-6. SPI_STAT Register
BIT 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
OFFSET B804
FIELD
///
IRQ OVERRUN COL
///
TXRUN SLVSEL
RESET 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
RW RW RW RW RW RW RW RW RW RW RW RW RW RW RW R R
Table 2-7. SPI_STAT Register Definitions
Bits Field Name Description
15:8 /// Reserved
Always returns zero.
7 IRQ Interrupt Request
1 = indicates the end of a master mode transfer, or that SLVSEL_N input has
gone HIGH on a slave transfer.
0 = indicates no end of a master mode transfer, or that SLVSEL_N input has not
gone HIGH on a slave transfer (default).
It takes two CPU clocks after SLVSEL_n changes to see the interrupt.
6 OVERRUN Overrun
1 = SPIDAT register is written to while an SPI transfer is in progress or
SLVSEL_N goes active in master mode.
0 = SPIDAT register has not been written to or SLVSEL_N has not gone active in
master mode (default).
5 COL Collision
1 = a master mode collision has occurred between multiple SPI masters (SLVSEL
is active while MSTEN=1).
0 = a master mode collision has not occurred (default).
4:2 /// Reserved
1 TXRUN Transmitter Running
1 = master mode operation underway.
0 = idle (default).
0 SLVSEL SLVSEL Pin
Corresponds to the SLVSEL (MSCS*) pin on SPI core (pin is normally inverted at
the I/O pin).