Once/Jtag Interface; Table 2-16 Once/Jtag Interface - Motorola DSP56309 User Manual

Signal
Name
TIO2 Input or
Output
2.12

OnCE/JTAG INTERFACE

OnCE/JTAG interface signal descriptions are listed in Table 2-16.
Signal
Name
TCK Input
TDI Input
MOTOROLA
Table 2-15 Triple Timer Signals (Continued)
State
Type During
Reset
Input

Table 2-16 OnCE/JTAG Interface

State
Type During
Reset
Input
Input
DSP56309UM/D
Signal/Connection Descriptions
Signal Description
Timer 2 Schmitt-Trigger Input/OutputÑ
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.
This signal is driven by a weak keeper after
reset.
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).
Signal Description
Test ClockÑTCK is a test clock input signal
used to synchronize the JTAG test logic. Its
pin has a pull-up resistor.
Test Data InputÑTDI is a test data serial
input signal used for test instructions and
data. TDI is sampled on the rising edge of
TCK and has an internal pull-up resistor.

OnCE/JTAG Interface

2-35