Table 2-10 Serial Audio Interface (Sai) Transmitter Signals; Sai Transmitter Section - Motorola DSP56009 User Manual

Signal Descriptions
Serial Audio Interface (SAI)
2.8.2

SAI Transmitter Section

Table 2-10 Serial Audio Interface (SAI) Transmitter signals

Signal Signal
Name Type
SDO0 Output
SDO1 Output
SDO2 Output
SCKT Input or
Output
2-20
State
during
Reset
Driven Serial Data Output 0 (SDO0)—SDO0 is the serial
High output for transmitter 0. SDO0 is driven high if
transmitter 0 is disabled, during individual reset,
hardware reset, and software reset, or when the DSP
is in the Stop state.
Driven Serial Data Output 1 (SDO1)—SDO1 is the serial
High output for transmitter 1. SDO1 is driven high if
transmitter 1 is disabled, during individual reset,
hardware reset and software reset, or when the DSP
is in the Stop state.
Driven Serial Data Output 2 (SDO2)—SDO2 is the serial
High output for transmitter 2. SDO2 is driven high if
transmitter 2 is disabled, during individual reset,
hardware reset and software reset, or when the DSP
is in the Stop state.
Tri-stated Serial Clock Transmit (SCKT)—This signal
provides the clock for the SAI. SCKT can be an
output if the transmit section is configured as a
master, or a Schmitt-trigger input if the transmit
section is configured as a slave. When the SCKT is an
output, it provides an internally generated SAI
transmit clock to external circuitry. When the SCKT
is an input, it allows external circuitry to clock data
out of the SAI.
Note: SCKT is high impedance if all transmitters are
disabled (individual reset), during hardware reset,
software reset, or while the DSP is in the Stop
state. While in the high impedance state, the
internal input buffer is disconnected from the pin
and no external pull-up is necessary.
DSP56009 User's Manual
Signal Description
MOTOROLA