Motorola DSP56012 MOTOROLA DSP56012 Users Manual 5-7

Serial Host Interface
Serial Host Interface Programming Model
MOTOROLA DSP56012 User’s Manual 5-7
The interrupt vector table for the Serial Host Interface is shown in Table 5-1 and the
exceptions generated by the SHI are prioritized as shown in Table 5-2.
Table 5-1 SHI Interrupt Vectors
Address Interrupt Source
P: $0020 SHI Transmit Data
P: $0022 SHI Transmit Underrun Error
P: $0024 SHI Receive FIFO Not Empty
P: $0026 Reserved
P: $0028 SHI Receive FIFO Full
P: $002A SHI Receive Overrun Error
P: $002C SHI Bus Error
Table 5-2 SHI Internal Interrupt Priorities
Priority Interrupt
Highest SHI Bus Error
SHI Receive Overrun Error
SHI Transmit Underrun Error
SHI Receive FIFO Full
SHI Transmit Data
Lowest SHI Receive FIFO Not Empty