Serial Host Interface (Shi); Digital Audio Transmitter (Dax) - Motorola DSP56367 User Manual

DSP56367 Overview
Peripheral Overview
1.5.6

SERIAL HOST INTERFACE (SHI)

The SHI is a serial input/output interface providing a path for communication and
program/coefficient data transfers between the DSP and an external host processor. The SHI
can also communicate with other serial peripheral devices. The SHI can interface directly to
either of two well-known and widely used synchronous serial buses: the Motorola serial
peripheral interface (SPI) bus and the Philips inter-integrated-circuit control (I
SHI supports either the SPI or I
device. To minimize DSP overhead, the SHI supports single-, double-, and triple-byte data
transfers. The SHI has a 10-word receive FIFO that permits receiving up to 30 bytes before
generating a receive interrupt, reducing the overhead for data reception. For more information
on the SHI, refer to Section 9 Serial Host Interface on page 9-1.
1.5.7

DIGITAL AUDIO TRANSMITTER (DAX)

The DAX is a serial audio interface module that outputs digital audio data in the AES/EBU,
CP-340 and IEC958 formats. For more information on the DAX, refer to Section 12 Digital
Audio Transmitter on page 12-1.
1-14
2
C bus protocol, as required, from a slave or a single-master
DSP56367
2
C) bus. The
MOTOROLA