Motorola DSP56309 User Manual page 78

Table 2-13 Enhanced Synchronous Serial Interface 1 (ESSI1) (Continued)
Signal
Name
STD1 Input/
Output
PD5 Input or
Output
MOTOROLA
State
Type During
Reset
Input
DSP56309UM/D
Signal/Connection Descriptions
Enhanced Synchronous Serial Interface
Signal Description
Serial Transmit DataÑSTD1 is used for
transmitting data from the serial transmit
shift register. STD1 is an output when data is
being transmitted.
This signal is driven by a weak keeper after
reset.
Port D 5ÑThe default configuration
following reset is GPIO input PD5. When this
port is configured as PD5, signal direction is
controlled through PRR1. The signal can be
configured as an ESSI signal STD1 through
PCR1.
2-31