dsp56167 Freescale Semiconductor, Inc, dsp56167 Datasheet - Page 22

• Manufacturer Part Number: dsp56167
• Description: Advance Information 16-bit Digital Signal Processor
• Manufacturer: Freescale Semiconductor, Inc

Signal/Pin Descriptions
16-Bit Synchronous Serial Interface 1 Port
16-BIT SYNCHRONOUS SERIAL INTERFACE 1 PORT
1-16
STD1
PC5
SRD1
PC6
SCK1
PC7
SFS0
PC9
Signal Name
Table 1-12 16-Bit Synchronous Serial Interface 1 (SSI1) Signals
Output Tri-
Output
Output
Input/
Input/
Signal
Input
Type
stated
Tri-
stated
Tri-
stated
Tri-
stated
during
Reset
State
Serial Transmit Data 1 (STD1)—This output transmits serial
data from the SSI1 Transmit Shift Register (TSR1).
Port C GPIO 5 (PC5)— This signal is a GPIO signal (PC5) when
the SSI1 STD1 function is not being used.
After reset, the default state is GPIO input.
Serial Receive Data 0 (SRD0)—The input receives serial data
into the SSI1 Receive Shift Register (RSR1).
Port C GPIO 6 (PC6)— This signal is a GPIO signal (PC6) when
the SSI1 SRD1 function is not being used.
After reset, the default state is GPIO input.
Serial Clock 1 (SCK1)—This bidirectional signal provides the
serial bit rate clock for the SSI1 interface. The clock signal can be
continuous or gated and is used by both the transmitter and
receiver.
Port C GPIO 7 (PC7)— This signal is a GPIO signal (PC7) when
the SSI1 SCK1 function is not being used.
After reset, the default state is GPIO input.
Serial Frame Sync 1— This bidirectional signal is used by the
SSI1 serial interface for frame sync I/O or flag I/O. The SFS1 is
used by both the transmitter and receiver to synchronize data
transfer and can be an input or an output.
Port C GPIO 9 (PC9)— This signal is a GPIO signal (PC9) when
the SSI1 SFS1 function is not being used.
After reset, the default state is GPIO input.
DSP56167/D, Rev. 1
Signal Description
MOTOROLA