Timers; Triple Timer Signals - Motorola DSP56303 User Manual

Timers

2.11 Timers
The DSP56303 has three identical and independent timers. Each can use internal or external
clocking, interrupt the DSP56303 after a specified number of events (clocks), or signal an
external device after counting a specific number of internal events.
Signal
Type
Name
TIO0 Input or
Output
TIO1 Input or
Output
TIO2 Input or
Output
Note: 1. The Wait processing state does not affect the signal state.
2-20
Table 2-15. Triple Timer Signals
1
State During
Reset Stop
Input Disconnected
internally
Input Disconnected
internally
Input Disconnected
internally
DSP56303 User's Manual
Signal Description
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.
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.
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.