Motorola MC68VZ328 13.3.4 SPI 1 Interrupt Control/Status Register

13-8 MC68VZ328 User’s Manual 
SPI 1 Programming Model
13.3.4 SPI 1 Interrupt Control/Status Register
This register is used to provide interrupt control and status of various operations in SPI 1. The bit position
assignments for this register are shown in the following register display. The settings for this register are
described in Table13-4.
SPIINTCS SPI 1 Interrupt Control/Status Register 0x(FF)FFF706
BIT
15 14 13 12 11 10 9 8 7654321BIT 0
BO
EN RO EN RFE NRHE NRRE NTFE NTHE NTEE NB OR OR FR HR RT FT HTE
TYPE rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw
RESET 0 0 0 0 0 0 0 0 0000000 0
0x0000
Table 13-4. SPI 1 Interrupt Control/Status Register Description
Name Description Setting
BOEN
Bit 15 Bit Count Overflow Interrupt Enable—This bit, when set, allows an interrupt to be generated
when an overflow bit count condition exists. See
the description of the BO (bit 7) for detai l s.
0 = Disable bit count overflow interrupt.
1 = Enable bit count overflow interrupt.
ROEN
Bit 14 RxFIFO Overflow Interrupt Enable—This bit, when set, allows an interrupt to be generated
when an overflow occurs in the RxFIFO. See the
description of the RO (bit 6) for details.
0 = Disable RxFIFO overflow interrupt.
1 = Enable RxFIFO overflow interrupt.
RFEN
Bit 13 RxFIFO Full Interrupt Enable—This bit, when set, allows an interrupt to be generated when
there are 8 data words in the RxFIFO. See the
description of the RF (bit 5) for details.
0 = Disable RxFIFO full interrupt enable.
1 = Enable RxFIFO full interrupt enable.
RHEN
Bit 12 RxFIFO Half Interrupt Enable—This bit, when set, allows an interrupt to be generated when the
contents of the RxFIFO is more than or equal to
4 data words. See the description of the RH (bit
4) for details.
0 = Disable half interrupt enable.
1 = Enable half interrupt enable.
RREN
Bit 11 RxFIFO Data Ready Interrupt Enable—This bit, when set, allows an interrupt to be generated
when at least 1 data word is ready in the
RxFIFO. See the description of the RR (bit 3) for
details.
0 = Disable data ready interrupt enable.
1 = Enabled data ready interrupt enable.
TFEN
Bit 10 TxFIFO Full Interrupt Enable—This bit, when set, causes an interrupt to be generated when
the TxFIFO buffer is full and the RFEN bit is set.
0 = Disable TxFIFO full interrupt.
1 = Enable TxFIFO full interrupt.
THEN
Bit 9 TxFIFO Half Interrupt Enable—This bit, when set, causes an interrupt to be generated when
the TxFIFO buffer is half empty and the THEN
bit is set.
0 = Disable TxFIFO half interrupt.
1 = Enable TxFIFO half interrupt.