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Signals/Connections
Signal Name
Type
SCLK
Input/Output
PE2
Input or Output
Notes:
1.
In the Stop state, the signal maintains the last state as follows:
• If the last state is input, the signal is an ignored input.
• If the last state is output, these lines have weak keepers that maintain the last output state even if the drivers are tri-stated.
2.
The Wait processing state does not affect the signal state.
1.11 Timers
The DSP56311 has three identical and independent timers. Each timer can use internal or external clocking and can
either interrupt the DSP56311 after a specified number of events (clocks) or signal an external device after
counting a specific number of internal events.
Signal Name
Type
TIO0
Input or Output
TIO1
Input or Output
TIO2
Input or Output
Notes:
1.
In the Stop state, the signal maintains the last state as follows:
• If the last state is input, the signal is an ignored input.
• If the last state is output, these lines have weak keepers that maintain the last output state even if the drivers are tri-stated.
2.
The Wait processing state does not affect the signal state.
1-14
Table 1-14.
Serial Communication Interface (Continued)
State During
1,2
Reset
Ignored Input
Serial Clock—Provides the input or output clock used by the transmitter and/or
the receiver.
Port E 2—The default configuration following reset is GPIO input PE2. When
configured as PE2, signal direction is controlled through the Port E Direction
Register. The signal can be configured as an SCI signal SCLK through the Port
E Control Register.
Table 1-15.
State During
1,2
Reset
Ignored 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. TIO0 can be changed to output or
configured as a timer I/O through the Timer 0 Control/Status Register (TCSR0).
Ignored 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. TIO1 can be changed to output or
configured as a timer I/O through the Timer 1 Control/Status Register (TCSR1).
Ignored 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. TIO2 can be changed to output or
configured as a timer I/O through the Timer 2 Control/Status Register (TCSR2).
DSP56311 Technical Data, Rev. 8
Signal Description
Triple Timer Signals
Signal Description
Freescale Semiconductor
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