Timers - Motorola DSP56309 User Manual

Table 2-14 Serial Communication Interface (SCI) (Continued)
Signal
Name
SCLK Input/
Output
PE2 Input or
Output
2.11

TIMERS

Three identical and independent timers are implemented in the DSP56309. Each timer
can use internal or external clocking; each timer can interrupt the DSP56309 after a
specified number of events (clocks) or can signal an external device after counting a
specific number of internal events. Triple timer signal descriptions are listed in
Table 2-15.
MOTOROLA
State
Type During
Reset
Input
DSP56309UM/D
Signal/Connection Descriptions
Signal Description
Serial ClockÑThis is the bidirectional
Schmitt-trigger input signal providing the
input or output clock used by the transmitter
and/or the receiver.
This signal is driven by a weak keeper after
reset.
Port E 2ÑThe default configuration
following reset is GPIO input PE2. When this
port is configured as PE2, signal direction is
controlled through the SCI PRR. The signal
can be configured as an SCI signal SCLK
through the SCI PCR.

Timers

2-33