dsp56004 Freescale Semiconductor, Inc, dsp56004 Datasheet - Page 21

• Manufacturer Part Number: dsp56004
• Description: Symphonytm Audio Dsp Family 24-bit Digital Signal Processors
• Manufacturer: Freescale Semiconductor, Inc

SAI Transmitter Section
MOTOROLA
SDO0
SDO1
SDO2
SCKT
WST
Signal
Name
Input or
Input or
Output
Output
Output
Output
Output
Signal
Type
Table 1-10 Serial Audio Interface (SAI) Transmitter signals
Freescale Semiconductor, Inc.
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Tri-stated
Tri-stated
during
Driven
Driven
Driven
Reset
State
High
High
High
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DSP56004/D, Rev. 3
Serial Data Output 0 (SDO0)—SDO0 is the serial 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.
Serial Data Output 1 (SDO1)—SDO1 is the serial 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.
Serial Data Output 2 (SDO2)—SDO2 is the serial 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.
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:
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:
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.
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.
Signal Description
Signal/Connection Descriptions
Serial Audio Interface (SAI)
1-15