Atmel AVR ATmegaICE User manual

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
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