Serial Audio Interface (Sai); Sai Receive Section; Table 2-8 Serial Audio Interface (Sai) Receive Signals - Motorola DSP56012 User Manual

Signal Descriptions

Serial Audio Interface (SAI)

2.8

SERIAL AUDIO INTERFACE (SAI)

The SAI is composed of separate receiver and transmitter sections.
2.8.1

SAI Receive Section

The receive section of the SAI has four dedicated signals

Table 2-8 Serial Audio Interface (SAI) Receive Signals

Signal Signal
Name Type
SDI0 Input
SDI1 Input
SCKR Input or
Output
WSR Input or
Output
2-16
State
during
Reset
Tri-stated Serial Data Input 0—This is the receiver 0 serial data input.
This signal is high impedance during hardware or software
reset, while receiver 0 is disabled (R0EN = 0), or while the chip
is in the Stop state. No external pull-up resistor is required.
Tri-stated Serial Data Input 1—This is the receiver 1 serial data input.
This signal is high impedance during hardware or software
reset, while receiver 1 is disabled (R1EN = 0), or while the chip
is in the Stop state. No external pull-up resistor is required.
Tri-stated Receive Serial Clock—SCKR is an output if the receiver
section is programmed as a master, and a Schmitt-trigger
input if programmed as a slave.
SCKR is high impedance if all receivers are disabled (personal
reset) and during hardware or software reset, or while the chip
is in the Stop state. No external pull-up is necessary.
Tri-stated Receive Word Select—WSR is an output if the receiver section
is programmed as a master, and a Schmitt-trigger input if
programmed as a slave. WSR is used to synchronize the data
word and to select the left/right portion of the data sample.
WSR is high impedance if all receivers are disabled (personal
reset), during hardware reset, during software reset, or while
the chip is in the stop state. No external pull-up is necessary.
DSP56012 User's Manual
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Signal Description
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