Motorola NXP SYMPHONY DSP56007 Technical Data Manual page 21

Freescale Semiconductor, Inc.
SAI Transmitter Section
Table 1-10 Serial Audio Interface (SAI) Transmitter signals
Signal Signal
Name Type
SDO0 Output
SDO1 Output
SDO2 Output
SCKT Input or
Output
WST Input or
Output
MOTOROLA
State
during
Reset
Driven Serial Data Output 0 (SDO0)—SDO0 is the serial output for
High 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 output for
High 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 output for
High 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.
Tri-stated Word Select Transmit (WST)—WST is an output if the
transmit section is programmed as a master, and a Schmitt-
trigger input if it is programmed as a slave. WST is used to
synchronize the data word and select the left/right portion of
the data sample.
Note: WST is high impedance if all transmitters are disabled
(individual reset), during hardware or 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.
DSP56007/D
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Signal/Connection Descriptions
Serial Audio Interface (SAI)
Signal Description
1-15