Motorola MPC821FADS Manuel utilisateur

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MPC821FADS

User’s Manual

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MOTOROLA

MPC821FADS-DB USER’S MANUAL

1-1

SECTION 1

INTRODUCTION

This document is the MPC821FADS daughterboard operation guide. The daughterboard

encompasses the MPC821 device along with some necessary logic that must be in close

proximity to the MPC821 and peripherals. These peripherals are dedicated to the MPC821,

but are not necessarily required for any other member of the MPC8xx Family. The

daughterboard has two sets of matching connectors—one set on the print side (on the

bottom of the board) and one on the component side (on the top of the board). Those on the

print side connect to a matching set found on the MPC8xxFADS, while those on the

componentside areto servehardware expansionvia adedicated adaptor.Also aset oflogic

analyzer connectors is featured matching the new high-density HP16500 logic analyzer

adaptors to provide fast connection to a logic analyzer while saving board space and

reducing EMI.

1.1 TERMINOLOGY

• ADI—Application Development Interface

• ADS—Application Development System

• BCSR—Board Control and Status Register

• BGA—Ball Grid Array

• DB—Daughterboard

• GPCM—General-Purpose Chip-Select Machine

• GPL—General-Purpose Line (associated with the UPM)

• I/R—Infra-Red

• UPM—User-Programmable Machine

• ZIF—Zero Input Force

1.2 RELATED DOCUMENTATION

• MPC821 User’s Manual

• SDS Monitor User’s Manual

• MPC8bug User’s Manual

• ADI Board Specification

• MPC8xxFADS User’s Manual

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Introduction

1-2

MPC821FADS-DB USER’S MANUAL

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1.3 SPECIFICATIONS

The MPC821FADS daughterboard specifications are shown in Table 1-1.

1.4 FEATURES

• MPC821 Operation at a Maximum 50MHz

• Selectable KAPWR Source—3.3V or Externally Supplied

• Selectable VDDL Source—3.3V or 2V

• Selectable Clock Source—32768Hz Crystal Resonator or 4MHz Clock Generator That

Can be Easily Changed to Any 3.3V-Powered Oscillator with a 3–5MHz Frequency

Range

• On-Board Expansion Connectors, Including All MPC821 Pins and MPC8xxFADS

Control and Status Signals.

• Onboard High-Density Logic Analyzer Connectors That Support Fast Connection to

HP16500 Logic Analyzer

• MPC821 Modem Tool Support

Table 1-1. MPC821FADS Daughterboard Specifications

CHARACTERISTICS SPECIFICATIONS

Microprocessor MPC821 @ 50MHz

Operating temperature 0

C – 30

Storage temperature -25

C to 85

Relative humidity 5% to 90% (noncondensing)

Dimensions:

Length

Width

Thickness

5.87" (145mm)

4.37" (125mm)

0.063" (1.6mm)

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Introduction

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MPC821FADS-DB USER’S MANUAL

1-3

Figure 1-1. MPC821FADS Daughterboard Block Diagram

MPC821

CLOCKS

DAUGHTER

EXPANSION

CONNECTORS EXPANSION

CONNECTORS

EXPANSION

CONNECTORS

BOARD

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MOTOROLA

MPC821FADS-DB USER’S MANUAL

2-1

SECTION 2

INSTALLATION

This section contains information about preparing, configuring, and installing the

MPC821FADS daughterboard. When you receive your daughterboard it should already be

connected to the MPC8xxFADS motherboard. You should unpack the shipping carton and

verify the contents against the packing list. If the contents were damaged during shipping,

call your local Motorola sales office, explain the problem, and you should receive another

package. If the contents are undamaged, save the packing slip and start configuring the

board for your design.

2.1 CONFIGURING THE BOARD

Before you configure the MPC821FADS daughterboard, you may have to change the

jumpers settings before you can install the board into your system. Since they are factory

set and tested, they may not be set correctly for your particular configuration. Figure 2-1

illustrates the location of these jumpers, LEDs, and connectors on the board. The

MPC821FADS daughterboard settings contain the following parameters that you can

change for your specific configuration:

• Clock generator

• Power-on reset source

• MPC821 keep-alive power source

• MPC821 internal logic supply source

Caution:

Avoid touching the integrated circuitry of the board with your hands since static

discharge can damage circuits.

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Installation

2-2

MPC821FADS-DB USER’S MANUAL

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Figure 2-1. MPC821FADS Daughterboard Parts Locator (Top Side)

HALO

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Installation

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MPC821FADS-DB USER’S MANUAL

2-3

2.1.1 Replacing the Clock Generator

When replacing the clock generator (U1), all you need to know is that there are two supply

levels. A 5V supply is available at Pin 14 and a 3.3V supply is available at Pin 11. To replace

it, just pop it out of the socket. Figure 2-2 illustrates that a 5V oscillator (with 3.3V output

only) can be used with a 14-pin form-factor, while 3.3V oscillators can be used with an 8-pin

form-factor.

Inserting a 14-pin form-factor 3.3V clock generator into U1 could cause permanent damage

to your device. Since the MPC821 clock input is not 5V-tolerant, any clock generator

inserted into U1 must have a 3.3V-compatible output. If you insert a 5V output clock

generator into U1, you could cause permanent damage to the MPC821 microprocessor.

Figure 2-2. U1 Power Sources

GND

3.3V

5V1

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Installation

2-4

MPC821FADS-DB USER’S MANUAL

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2.1.2 Selecting the Power-On Reset Source

The functionality of the power-on reset logic changes with each revision of the MPC821. For

your purposes, this means that you may need to select a different source to generate a

power-on reset. To select your power-on reset source, you need to set J1 on the

MPC821FADS daughterboard. When the J1 jumper is between positions 1 and 2, a

power-on reset is generated by the keep-alive power rail (KAPWR). For example, when

KAPWRgoes below2.005V, a power-onreset isgenerated. When theJ1 jumperisbetween

positions 2 and 3, a power-on reset is generated from the main 3.3V power rail. In other

words, when the 3.3V power rail gets below 2.805V, a power-on reset is generated.

2.1.3 Selecting the Keep-Alive Power Source

The J2 jumper is used to select the keep-alive power source. When the J2 jumper is

between positions 1 and 2, the keep-alive power is fed from the main 3.3V bus. When you

need to connect an external power source (such as a battery) to the keep-alive power rail,

it should be connected between positions 2 (the positive pole) and 3 (GND).

Figure 2-3. Power-On Reset Source

Figure 2-4. Keep-Alive Power Source

J1 J1

KEEP-ALIVE POWER RAIL MAIN POWER RAIL

J2 J2

–

EXTERNAL

3.3V

KAPWR

GND

3.3V

KAPWR

GND

KAPWR FROM 3.3V KAPWR FROM EXTERNAL

POWER SUPPLY POWER SUPPLY

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Installation

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MPC821FADS-DB USER’S MANUAL

2-5

2.1.4 Selecting the VDDL Source

The J3 jumper is used to select the VDDL, which supplies the MPC821’s internal logic.

When the J3 jumper is between positions 1 and 2, VDDL is supplied with 3.3V of power.

When the J3 jumper is between positions 2 and 3, VDDL is supplied with 2.2V of power. The

J3 jumper is factory set between positions 1 and 2.

Figure 2-5. VDDL Source

3.3V VDDL 2V VDDL

J3 J3

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