Atmel AVR ATmegaICE Bedienungsanleitung

AVR®ATmegaICE User Guide 1-1

Section 1

Introduction

The ATmegaICE is a real time In-Circuit Emulator (ICE) for all ATmega devices. It can

be upgraded to support future ATmega parts. It is controlled by AVR®Studio, which is a

professional front-end for both high-level and assembly level debugging. AVR Studio is

described in Section 1 in the Development Tools User Guide and must be studied care-

fully in order to take full advantage of this product.

The ATmega ICE system consists of the following elements:

■AVR ICE unit

■POD card ATmegaPOD

■Pod cable

■ATmega103/ATmega603 probe with TQFP64 adapter including cables

■RS-232 cable

■Power supply unit

■Documentation

Rev. 1077A–01/99

Introduction

1-2 AVR®ATmegaICE User Guide

Figure 1-1.

ATmegaICE with Pod Connected

The AVR ICE unit is the main part of the AVR ATmegaICE system. AVR Studio, which

runs on a host PC, controls the ICE unit. The ICE unit must be connected to an available

RS-232 port on the host PC with the supplied RS-232 cable. AVR Studio automatically

detects if there is an emulator present on one of the PC’s serial ports. Note that if no ICE

is found, AVR Studio will show “Simulator” in the lower right corner of the main window.

If the ICE is found, “AVR Emulator” will be indicated and your connections are correct.

AVR Studio will issue a warning if a program previously run in emulator mode is started

in simulator mode.

Figure 1-2.

ATmegaICE Back Panel

Figure 1-3.

ATmegaICE Front Panel

Introduction

AVR®ATmegaICE User Guide 1-3

Figure 1-4.

ATmega103/ATmega603 Probe

Introduction

1-4 AVR®ATmegaICE User Guide

AVR®ATmegaICE User Guide 2-1

Section 2

Preparing the

ATmegaICE System for Use

Complete the following procedure in order to start using the ATmegaICE.

Before connecting the probe cable to the user application:

1. Connect the pod card to the AVR ICE unit with the pod cables. Do not disassem-

ble the pod cables.

2. Connect the probe cables to the pod. See Section 4 for details.

3. Connect the RS-232 cable between the AVR ICE unit and an available serial port

on the host PC.

4. Connect a power supply (9 - 15 VDC, negative center) to the ATmegaICE unit.

The power supply delivered with your ATmegaICE is correctly dimensioned.

5. Turn the power on and check that the red LED marked “POWER” is lit.

6. After a short time (<10 s) the green LED marked “READY” will be lit and the

ATmegaICE system is ready.

7. Turn the power off.

8. Solder the TQFP64 adapter PCB part of the probe connector to the target PCB.

9. Connect the probe into the application, and pay attention to connect it correctly. If

it is not connected correctly, your ATmegaICE system may be damaged.

10. When the probe is correctly connected to the application, check the jumper

marked “J500” (Ext.Power) on the ATmegaPOD (see Figure 3-1). If the applica-

tion is to be powered from the ATmegaICE unit, the jumper should be mounted. If

the application is to use its own power supply, the jumper must be removed.

11. Make sure that the voltage regulation, external clock and Timer oscillator are set

according to the target system requirements (see Section 3).

12. When all jumpers are set, turn the power on. When the green LED is lit, the AVR

ATmegaICE system is ready for use. Start AVR Studio, and begin your AVR emu-

lation session.

It is possible to use the ATmegaICE without the ATmega probe and the TQFP64

adapter if four 8 x 2 pin headers are added to the target application PCB.

Tables 4-1, 4-2, 4-3 and 4-4 give details on how to use these header connectors. Con-

nect the pin headers on the target application to the In-System connectors on ATmega-

POD by using the probe cable included in your kit.

Preparing the ATmegaICE System for Use

2-2 AVR®ATmegaICE User Guide

AVR®ATmegaICE User Guide 3-1

Section 3

ATmegaPOD

ATmegaPOD is the pod card used for the microcontrollers ATmega103/603.

The pod contains several jumpers which must be set to achieve the desired operation.

The jumpers involved in the configuration are indicated in Figure 3-1.

Figure 3-1.

Pod Jumper Placements

J112/J113

IN-SYSTEM CONNECTORS

J300

EXT. CLOCK

J354/J352

TCLK FREQ.

J351/J350

TCLK SRC.

J200/J201/J202

TARGET VOLTAGE

J110/J111

IN-SYSTEM

CONNECTORS

J500

EXT. POWER

ATmegaPOD

3-2 AVR®ATmegaICE User Guide

3.1 Voltage

Regulation for

Port Pins

If the target system uses its own power supply, the output voltage must be set to the

voltage in the target system. The jumpers J200-J202 are used for this purpose. The

interpretation of the different settings of these jumpers is shown in Figure 3-2.

Figure 3-2.

Jumper Setting

3.2 Clock Setting The external clock system can be set to use either an external crystal or an external

clock signal.

To use an external crystal, select “External Oscillator” in the “Emulator Options” menu in

AVR Studio, and select an appropriate frequency range for the mounted crystal. Note

that the selected frequency range may not correspond to the crystal frequency due to

load capacitors and/or stray capacitors in the system. J300 must be open when using an

external crystal.

If an external clock signal is used (on pin XTAL1), jumper J300 must be mounted. This

setting also requires the user to select External Oscillator in the Emulator Options menu

in AVR Studio.

ATmegaICE also has a very accurate programmable internal clock which can be used

for emulation. Select this clock by choosing Internal Oscillator in the Emulator Options

menu in AVR Studio. Setting of J300 on the ATmegaPOD and crystals and clock signals

in the user application are insignificant when the internal oscillator is selected.

3.3 Timer Oscillator

Setting In order to enable the Timer oscillator, jumper J351 must be mounted. When J351 is

mounted, the setting of J350 determines whether to use an external clock signal or the

local oscillator. If J350 is mounted, the external clock signal is used (on pin TOSC1).

If J350 is not mounted, an external crystal is expected to be mounted between the

TOSC1 and TOSC2 pins. When an external crystal is used (J350 not mounted), jumpers

J352 and J354 should be used to indicate the frequency range of the oscillator. The

interpretation of the different settings for these jumpers is given in Table 3-1.

Target VCC J202 J201 J200

2.7 - 2.9 V

3.0 - 3.3 V

3.4 - 3.7 V

3.8 - 4.1 V

4.2 - 4.5 V

4.6 - 4.8 V

4.9 - 5.1 V

5.2 - 5.5 V

Table 3-1.

OSC frequency range jumper settings

J354 J352 Frequency Range

- - 10 kHz - 100 kHz

- Mounted 100 kHz - 1 MHz

Mounted - 1 MHz - 5 MHz

Mounted Mounted 5 MHz - 10 MHz

ATmegaPOD

AVR®ATmegaICE User Guide 3-3

As noted above, the selected frequency range may not correspond to the crystal fre-

quency due to load capacitors and/or stray capacitors.

Due to long probe leads, it may be difficult to emulate the 32 kHz oscillator in many

designs. A way to work around this is to lift pin 2 and 3 on U351 from the PCB and sol-

der a 32 kHz crystal directly to the pins, without neither the pins nor the crystal touching

the PCB.

3.4 Power to Target

PCB The ATmegaICE can power the target PCB with 5.0V. To enable this option, J500

should be mounted. Note that the absolute maximum supply current is 1.0A, so the tar-

get should use less than 5W of power to use this option.

If the target PCB uses voltages other than 5.0V, J500 must be removed.

ATmegaPOD

3-4 AVR®ATmegaICE User Guide

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