Microcontroller User's Manual

14-6 MCF5282 User’s Manual MOTOROLA
Overview
Clear-to-send UCTS[1:0] Signals UART that it can begin data
transmission.
I 14-27
Request to send URTS
[1:0] Automatic UART request to send
outputs.
O 14-27
General Purpose Timer Signals
GPTA GPTA[3:0] Provide the external interface to the
timer A functions.
I/O 14-27
GPTB GPTB[3:0] Provide the external interface to the
timer B functions.
I/O 14-27
External clock input SYNCA/SYNCB Clear the timer’s clock, providing a
means of synchronization to externally
clocked or timed events.
I 14-27
DMA Timer Signals
DMA timer input DTIN[3:0] Clock the event counter or provide a
trigger to timer value capture logic.
I/O 14-28
DMA timer output DTOUT[3:0] Pulse or toggle on timer events. I/O 14-28
Analog-to-Digital Converter (QADC) Signals
QADC analog input AN[0:3]/AN[W:Z] Direct analog input ANn, or
multiplexed input ANx.
I 14-29
QADC analog input AN[52:53]/MA[0:1] Direct analog input ANn, or
multiplexed output MAn. MAn selects
the output of the external multiplexer.
I/O 14-29
QADC analog input AN[55:56]/
TRIG[1:2]
Direct analog input ANn, or input
TRIGn. TRIGn causes one of the two
queues to execute.
I 14-30
Debug Support Signals
JTAG_EN JTAG_EN Selects between multiplexed debug
module and JTAG signals at reset.
I 14-30
Development serial
clock/Test reset
DSCLK/TRST
Development serial clock for the serial
interface to debug module (DSCLK).
Asynchronously resets the internal
JTAG controller to the test logic reset
state (TRST
).
I 14-30
Breakpoint/
Test mode select
BKPT/TMS Signals a hardware breakpoint in
debug mode (BKPT
). Provides
information that determines JTAG test
operation mode (TMS).
I 14-31
Development serial
input/Test data
DSI/TDI Provides single-bit communication for
debug module commands (DSI).
Provides serial data port for loading
JTAG boundary scan, bypass, and
instruction registers (TDI).
I 14-31
Table 14-1. MCF5282 Signal Description (Continued)
Signal Name Abbreviation Function I/O Page