Overview

Table 14-1. MCF5282 Signal Description (Continued)

Signal Name

Abbreviation

Function

I/O

Page

 

 

 

 

 

Development serial

DSO/TDO

Provides single-bit communication for

O

14-31

output/Test data

 

debug module responses (DSO).

 

 

 

 

Provides serial data port for outputting

 

 

 

 

JTAG logic data (TDO).

 

 

 

 

 

 

 

Test clock

TCLK

JTAG test logic clock.

I

14-31

 

 

 

 

 

Debug data

DDATA[3:0]

Display captured processor

O

14-32

 

 

addresses, data, and breakpoint

 

 

 

 

status.

 

 

 

 

 

 

 

Processor status

PST[3:0]

Indicate core status.

O

14-32

outputs

 

 

 

 

 

 

 

 

 

 

 

Test Signals

 

 

 

 

 

 

 

Test

TEST

Reserved, should be connected to

I

14-32

 

 

VSS.

 

 

 

 

 

 

 

 

Power and Reference Signals

 

 

 

 

 

 

 

QADC analog reference

VRH, VRL

High (VRH) and low (VRL) reference

Ground

14-33

 

 

potentials for the analog converter.

 

 

 

 

 

 

 

QADC analog supply

VDDA, VSSA

Isolate the QADC analog circuitry

I

14-33

 

 

from digital power supply noise.

 

 

 

 

 

 

 

PLL analog supply

VDDPLL, VSSPLL

Isolate the PLL analog circuitry from

I

14-33

 

 

digital power supply noise.

 

 

 

 

 

 

 

QADC positive supply

VDDH

Supplies positive power to the ESD

I

14-33

 

 

structures in the QADC pads.

 

 

 

 

 

 

 

Flash erase/program

VPP

Used for Flash stress testing.

I

14-33

power

 

 

 

 

 

 

 

 

 

Flash array power

VDDF, VSSF

Supply power and ground to Flash

I

14-33

and ground

 

array.

 

 

 

 

 

 

 

Standby power

VSTBY

Provides standby voltage to RAM

I

14-33

 

 

array if VDD is lost.

 

 

 

 

 

 

 

Positive supply

VDD

Supplies positive power to the core

I

14-33

 

 

logic and I/O pads.

 

 

 

 

 

 

 

Ground

VSS

Negative supply.

 

14-33

 

 

 

 

 

Table 14-2lists signals in alphabetical order by abbreviated name.

MOTOROLA

Chapter 14. Signal Descriptions

14-7

Page 287
Image 287
Motorola MCF5281 2lists signals in alphabetical order by abbreviated name, Test Signals, Power and Reference Signals