DSP56311UM/D View Datasheet(PDF) - Motorola => Freescale
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Description
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DSP56311UM/D Datasheet PDF : 100 Pages
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Enhanced Synchronous Serial Interface 1 (ESSI1)
Table 1-12. Enhanced Synchronous Serial Interface 0 (Continued)
Signal Name Type
SRD0
Input
State During
Reset1,2
Signal Description
Ignored Input Serial Receive Data—Receives serial data and transfers the data
to the ESSI receive shift register. SRD0 is an input when data is
received.
PC4
STD0
Input or Output
Output
Ignored Input
Port C 4—The default configuration following reset is GPIO input
PC4. When configured as PC4, signal direction is controlled
through the Port C Direction Register. The signal can be
configured as an ESSI signal SRD0 through the Port C Control
Register.
Serial Transmit Data—Transmits data from the serial transmit
shift register. STD0 is an output when data is transmitted.
PC5
Input or Output
Port C 5—The default configuration following reset is GPIO input
PC5. When configured as PC5, signal direction is controlled
through the Port C Direction Register. The signal can be
configured as an ESSI signal STD0 through the Port C Control
Register.
Notes: 1. In the Stop state, the signal maintains the last state as follows:
• If the last state is input, the signal is an ignored input.
• If the last state is output, these lines have weak keepers that maintain the last output state even if the
drivers are tri-stated.
2. The Wait processing state does not affect the signal state.
1.10 Enhanced Synchronous Serial Interface 1 (ESSI1)
Table 1-13. Enhanced Serial Synchronous Interface 1
Signal Name
Type
State During
Reset1,2
Signal Description
SC10
Input or Output
Ignored Input
Serial Control 0—For asynchronous mode, this signal is used for
the receive clock I/O (Schmitt-trigger input). For synchronous
mode, this signal is used either for transmitter 1 output or for serial
I/O flag 0.
PD0
SC11
Input or Output
Port D 0—The default configuration following reset is GPIO input
PD0. When configured as PD0, signal direction is controlled
through the Port D Direction Register. The signal can be
configured as an ESSI signal SC10 through the Port D Control
Register.
Input/Output
Ignored Input Serial Control 1—For asynchronous mode, this signal is the
receiver frame sync I/O. For synchronous mode, this signal is
used either for Transmitter 2 output or for Serial I/O Flag 1.
PD1
Input or Output
Port D 1—The default configuration following reset is GPIO input
PD1. When configured as PD1, signal direction is controlled
through the Port D Direction Register. The signal can be
configured as an ESSI signal SC11 through the Port D Control
Register.
1-15
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