Motorola ColdFire MCF5281 - Manual (Page 246)

Signal Descriptions
14-6 Freescale Semiconductor
Clear-to-send UCTS[1:0] Signals UART that it can begin data
transmission. I 14-26
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 14-27
DMA timer output DTOUT[3:0] Pulse or toggle on timer events. I/O 14-27
Analog-to-Digital Converter (QADC) Signals
QADC analog input AN[0:3]/AN[W:Z] Direct analog input ANn, or
multiplexed input ANx. I 14-28
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 14-29
Debug Support Signals
JTAG_EN JTAG_EN Selects between multiplexed debug
module and JTAG signals at reset. I 14-29
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 14-30
Table 14-1. MCF5282 Signal Description (continued)
Signal Name Abbreviation Function I/O Page
MCF5282 and MCF5216 ColdFire Microcontroller User’s Manual, Rev. 3