dsp56824 Freescale Semiconductor, Inc, dsp56824 Datasheet - Page 16

• Manufacturer Part Number: dsp56824
• Description: 16-bit Digital Signal Processor
• Manufacturer: Freescale Semiconductor, Inc

2.8 Synchronous Serial Interface (SSI) Signals
16
STD
PC8
SRD
PC9
STCK
PC10
STFS
PC11
SRCK
PC12
Signal
Name
Input or
Input or
Input or
Input or
Input or
Signal
Output
Output
Output
Output
Output
Output
Output
Output
Output
Input/
Input/
Input/
Type
Input
Table 14. Synchronous Serial Interface (SSI) Signals
During
Reset
State
Freescale Semiconductor, Inc.
Input
Input
Input
Input
Input
For More Information On This Product,
SSI Transmit Data (STD)—This output pin transmits serial data from the
SSI Transmitter Shift Register.
Port C GPIO 8 (PC8)—This pin is a GPIO pin called PC8 when the SSI
STD function is not being used.
After reset, the default state is GPIO input.
SSI Receive Data—This input pin receives serial data and transfers the
data to the SSI Receive Shift Register.
Port C GPIO 9 (PC9)—This pin is a GPIO pin called PC9 when the SSI
SRD function is not being used.
After reset, the default state is GPIO input.
SSI Serial Transmit Clock—This bidirectional pin provides the serial bit
rate clock for the Transmit section of the SSI. The clock signal can be
continuous or gated and can be used by both the transmitter and receiver in
Synchronous mode.
Port C GPIO 10 (PC10)—This pin is a GPIO pin called PC10 when the SSI
STCK function is not being used.
After reset, the default state is GPIO input.
Serial Transmit Frame Sync—This bidirectional pin is used by the
Transmit section of the SSI as frame sync I/O or flag
I/O. The STFS can be used by both the transmitter and receiver in
Synchronous mode. It is used to synchronize data transfer and can be an
input or an output.
Port C GPIO 11 (PC11)—This pin is a GPIO pin called PC11 when the SSI
STFS function is not being used. This pin is not required by the SSI in
Gated Clock mode.
After reset, the default state is input.
SSI Serial Receive Clock—This bidirectional pin provides the serial bit
rate clock for the Receive section of the SSI. The clock signal can be
continuous or gated and can be used only by the receiver.
Port C GPIO 12 (PC12)—This pin is a GPIO pin called PC12 when the SSI
STD function is not being used.
After reset, the default state is GPIO input.
DSP56824 Technical Data
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Signal Description