Motorola DSP56301 - Manual (Page 58)

Timers
2 -28 DSP56301 User’s Manual
Table 2-16. Triple Timer Signals
Signal Name Type
State During
Reset
Signal Description
TIO0 Input or Output Input Timer 0 Schmitt-Trigger Input/Output— When Timer 0
functions as an external event counter or in measurement
mode, TIO0 is used as input. When Timer 0 functions in
watchdog, timer, or pulse modulation mode, TIO0 is used as
output.
The default mode after reset is GPIO input. This can be
changed to output or configured as a timer I/O through the
timer 0 control/status register (TCSR0).
This signal has a weak keeper to maintain the last state even
if all drivers are tri-stated.
TIO1 Input or Output Input Timer 1 Schmitt-Trigger Input/Output— When Timer 1
functions as an external event counter or in measurement
mode, TIO1 is used as input. When Timer 1 functions in
watchdog, timer, or pulse modulation mode, TIO1 is used as
output.
The default mode after reset is GPIO input. This can be
changed to output or configured as a timer I/O through the
timer 1 control/status register (TCSR1).
This signal has a weak keeper to maintain the last state even
if all drivers are tri-stated.
TIO2 Input or Output Input Timer 2 Schmitt-Trigger Input/Output— When timer 2
functions as an external event counter or in measurement
mode, TIO2 is used as input. When timer 2 functions in
watchdog, timer, or pulse modulation mode, TIO2 is used as
output.
The default mode after reset is GPIO input. This can be
changed to output or configured as a timer I/O through the
timer 2 control/status register (TCSR2).
This signal has a weak keeper to maintain the last state even
if all drivers are tri-stated.