Signals/Connections
Signal Name
Table 1-14. Serial Communication Interface (SCI) (Continued)
State During
Type
Signal Description
Reset
SCLK
PE2
Input/Output
Input
Serial Clock
Provides the input or output clock used by the transmitter and/or the receiver.
Input or Output
Port E 2
The default configuration following reset is GPIO. For PE2, signal direction is
controlled through the SCI PRR. The signal can be configured as an SCI
signal SCLK through the SCI PCR.
This input is 5 V tolerant.
1.11 Timers
The DSP56301 has three identical and independent timers. Each can use internal or external clocking, interrupt the
DSP56301 after a specified number of events (clocks), or signal an external device after counting a specific number
of internal events.
Table 1-15. Triple Timer Signals
State During
Signal Name
Type
Signal Description
Reset
TIO0
Input or Output
Input
Input
Input
Timer 0 Schmitt-Trigger Input/Output
As an external event counter or in Measurement mode, TIO0 is input. In
Watchdog, Timer, or Pulse Modulation mode, TIO0 is output.
The default mode after reset is GPIO input. This can be changed to output or
configured as a Timer Input/Output through the Timer 0 Control/Status
Register (TCSR0).
This input is 5 V tolerant.
TIO1
Input or Output
Timer 1 Schmitt-Trigger Input/Output
As an external event counter or in Measurement mode, TIO1 is input. In
Watchdog, Timer, or Pulse Modulation mode, TIO1 is output.
The default mode after reset is GPIO input. This can be changed to output or
configured as a Timer Input/Output through the Timer 1 Control/Status
Register (TCSR1).
This input is 5 V tolerant.
TIO2
Input or Output
Timer 2 Schmitt-Trigger Input/Output
As an external event counter or in Measurement mode, TIO2 is input. In
Watchdog, Timer, or Pulse Modulation mode, TIO2 is output.
The default mode after reset is GPIO input. This can be changed to output or
configured as a Timer Input/Output through the Timer 2 Control/Status
Register (TCSR2).
This input is 5 V tolerant.
DSP56301 Technical Data, Rev. 10
1-20
Freescale Semiconductor
FREESCALE [ Freescale ]
