Microcontroller User's Manual

MOTOROLA Chapter 14. Signal Descriptions 14-7
Overview
Table 14-2 lists signals in alphabetical order by abbreviated name.
Development serial
output/Test data
DSO/TDO Provides single-bit communication for
debug module responses (DSO).
Provides serial data port for outputting
JTAG logic data (TDO).
O 14-31
Test clock TCLK JTAG test logic clock. I 14-31
Debug data DDATA[3:0] Display captured processor
addresses, data, and breakpoint
status.
O 14-32
Processor status
outputs
PST[3:0] Indicate core status. O 14-32
Test Signals
Test TEST Reserved, should be connected to
VSS.
I 14-32
Power and Reference Signals
QADC analog reference VRH, VRL High (VRH) and low (VRL) reference
potentials for the analog converter.
Ground 14-33
QADC analog supply VDDA, VSSA Isolate the QADC analog circuitry
from digital power supply noise.
I 14-33
PLL analog supply VDDPLL, VSSPLL Isolate the PLL analog circuitry from
digital power supply noise.
I 14-33
QADC positive supply VDDH Supplies positive power to the ESD
structures in the QADC pads.
I 14-33
Flash erase/program
power
VPP Used for Flash stress testing. I 14-33
Flash array power
and ground
VDDF, VSSF Supply power and ground to Flash
array.
I 14-33
Standby power VSTBY Provides standby voltage to RAM
array if VDD is lost.
I 14-33
Positive supply VDD Supplies positive power to the core
logic and I/O pads.
I 14-33
Ground VSS Negative supply. 14-33
Table 14-1. MCF5282 Signal Description (Continued)
Signal Name Abbreviation Function I/O Page