Atmel Atmel-ICE User Manual
The Atmel-ICE Debugger
Programmers and Debuggers
Atmel-ICE
USER GUIDE
Atmel-ICE is a powerful development tool for debugging and programming
ARM® Cortex®-M based Atmel® SAM and Atmel AVR® microcontrollers with
On-Chip Debug capability.
It supports:
• Programming and on-chip debugging of all Atmel AVR 32-bit
microcontrollers on both JTAG and aWire interfaces
• Programming and on-chip debugging of all Atmel AVR XMEGA® family
devices on both JTAG and PDI 2-wire interfaces
• Programming (JTAG, SPI, UPDI) and debugging of all Atmel AVR 8-bit
microcontrollers with OCD support on either JTAG, debugWIRE or
UPDI interfaces
• Programming and debugging of all Atmel SAM ARM Cortex-M based
microcontrollers on both SWD and JTAG interfaces
• Programming (TPI) of all Atmel tinyAVR® 8-bit microcontrollers with
support for this interface
Consult the supported devices list in the Atmel Studio User Guide for a full
list of devices and interfaces supported by this firmware release.
Atmel-42330C-Atmel-ICE_User Guide-10/2016
Table of Contents
The Atmel-ICE Debugger................................................................................................ 1
1. Introduction................................................................................................................5
1.1. Introduction to the Atmel-ICE....................................................................................................... 5
1.2. Atmel-ICE Features......................................................................................................................5
1.3. System Requirements.................................................................................................................. 6
2. Getting Started with the Atmel-ICE............................................................................7
2.1. Full Kit Contents........................................................................................................................... 7
2.2. Basic Kit Contents........................................................................................................................ 7
2.3. PCBA Kit Contents....................................................................................................................... 8
2.4. Spare Parts Kits............................................................................................................................8
2.5. Kit Overview................................................................................................................................. 9
2.6. Assembling the Atmel-ICE..........................................................................................................10
2.7. Opening the Atmel-ICE...............................................................................................................11
2.8. Powering the Atmel-ICE............................................................................................................. 13
2.9. Connecting to the Host Computer.............................................................................................. 13
2.10. USB Driver Installation............................................................................................................... 13
2.10.1. Windows...................................................................................................................... 13
3. Connecting the Atmel-ICE....................................................................................... 15
3.1. Connecting to AVR and SAM Target Devices.............................................................................15
3.2. Connecting to a JTAG Target..................................................................................................... 16
3.3. Connecting to an aWire Target...................................................................................................17
3.4. Connecting to a PDI Target........................................................................................................ 18
3.5. Connecting to a UPDI Target......................................................................................................18
3.6. Connecting to a debugWIRE Target...........................................................................................19
3.7. Connecting to an SPI Target...................................................................................................... 20
3.8. Connecting to a TPI Target.........................................................................................................21
3.9. Connecting to an SWD Target....................................................................................................22
3.10. Connecting to Data Gateway Interface...................................................................................... 23
4. On-chip Debugging..................................................................................................24
4.1. Introduction.................................................................................................................................24
4.2. SAM Devices with JTAG/SWD...................................................................................................24
4.2.1. ARM CoreSight Components...................................................................................... 24
4.2.2. JTAG Physical Interface...............................................................................................25
4.2.3. Connecting to a JTAG Target.......................................................................................27
4.2.4. SWD Physical Interface............................................................................................... 28
4.2.5. Connecting to an SWD Target..................................................................................... 28
4.2.6. Special Considerations................................................................................................ 29
4.3. AVR UC3 Devices with JTAG/aWire...........................................................................................29
4.3.1. Atmel AVR UC3 On-chip Debug System.....................................................................30
4.3.2. JTAG Physical Interface...............................................................................................30
4.3.3. Connecting to a JTAG Target.......................................................................................32
Atmel Atmel-ICE [USER GUIDE]
Atmel-42330C-Atmel-ICE_User Guide-10/2016
2
4.3.4. aWire Physical Interface.............................................................................................. 33
4.3.5. Connecting to an aWire Target.................................................................................... 34
4.3.6. Special Considerations................................................................................................ 35
4.3.7. EVTI / EVTO Usage.....................................................................................................35
4.4. tinyAVR, megaAVR, and XMEGA Devices.................................................................................35
4.4.1. JTAG Physical Interface...............................................................................................36
4.4.2. Connecting to a JTAG Target.......................................................................................36
4.4.3. SPI Physical Interface..................................................................................................38
4.4.4. Connecting to an SPI Target........................................................................................38
4.4.5. PDI...............................................................................................................................39
4.4.6. Connecting to a PDI Target..........................................................................................39
4.4.7. UPDI Physical Interface...............................................................................................40
4.4.8. Connecting to a UPDI Target.......................................................................................41
4.4.9. TPI Physical Interface..................................................................................................42
4.4.10. Connecting to a TPI Target..........................................................................................42
4.4.11. Advanced Debugging (AVR JTAG /debugWIRE devices)........................................... 43
4.4.12. megaAVR Special Considerations...............................................................................44
4.4.13. AVR XMEGA Special Considerations..........................................................................45
4.4.14. debugWIRE Special Considerations............................................................................46
4.4.15. debugWIRE Software Breakpoints.............................................................................. 47
4.4.16. Understanding debugWIRE and the DWEN Fuse....................................................... 47
4.4.17. TinyX-OCD (UPDI) Special Considerations.................................................................48
5. Hardware Description.............................................................................................. 50
5.1. LEDs...........................................................................................................................................50
5.2. Rear Panel..................................................................................................................................50
5.3. Bottom Panel..............................................................................................................................51
5.4. Architecture Description............................................................................................................. 51
5.4.1. Atmel-ICE Main Board................................................................................................. 51
5.4.2. Atmel-ICE Target Connectors...................................................................................... 52
5.4.3. Atmel-ICE Target Connectors Part Numbers...............................................................52
6. Software Integration.................................................................................................53
6.1. Atmel Studio............................................................................................................................... 53
6.1.1. Software Integration in Atmel Studio........................................................................... 53
6.1.2. Programming Options..................................................................................................53
6.1.3. Debug Options.............................................................................................................53
6.2. Command Line Utility................................................................................................................. 54
7. Advanced Debugging Techniques........................................................................... 55
7.1. Atmel AVR UC3 Targets............................................................................................................. 55
7.1.1. EVTI / EVTO Usage.....................................................................................................55
7.2. debugWIRE Targets................................................................................................................... 55
7.2.1. debugWIRE Software Breakpoints.............................................................................. 55
8. Release History and Known issues......................................................................... 57
8.1. Firmware Release History.......................................................................................................... 57
8.2. Known Issues Concerning the Atmel-ICE.................................................................................. 57
8.2.1. General........................................................................................................................ 57
Atmel Atmel-ICE [USER GUIDE]
Atmel-42330C-Atmel-ICE_User Guide-10/2016
3
8.2.2. Atmel AVR XMEGA OCD Specific Issues....................................................................57
8.2.3. Atmel AVR - Device Specific Issues............................................................................ 58
9. Product Compliance................................................................................................ 59
9.1. RoHS and WEEE....................................................................................................................... 59
9.2. CE and FCC............................................................................................................................... 59
10. Revision History.......................................................................................................60
Atmel Atmel-ICE [USER GUIDE]
Atmel-42330C-Atmel-ICE_User Guide-10/2016
4
1. Introduction
1.1. Introduction to the Atmel-ICE
Atmel-ICE is a powerful development tool for debugging and programming ARM Cortex-M based Atmel
SAM and Atmel AVR microcontrollers with On-Chip Debug capability.
It supports:
• Programming and on-chip debugging of all Atmel AVR UC3 microcontrollers on both JTAG and
aWire interfaces
• Programming and on-chip debugging of all AVR XMEGA family devices on both JTAG and PDI 2-
wire interfaces
• Programming (JTAG and SPI) and debugging of all AVR 8-bit microcontrollers with OCD support on
both JTAG or debugWIRE interfaces
• Programming and debugging of all Atmel SAM ARM Cortex-M based microcontrollers on both SWD
and JTAG interfaces
• Programming (TPI) of all Atmel tinyAVR 8-bit microcontrollers with support for this interface
1.2. Atmel-ICE Features
• Fully compatible with Atmel Studio
• Supports programming and debugging of all Atmel AVR UC3 32-bit microcontrollers
• Supports programming and debugging of all 8-bit AVR XMEGA devices
• Supports programming and debugging of all 8-bit Atmel megaAVR® and tinyAVR devices with OCD
• Supports programming and debugging of all SAM ARM Cortex-M based microcontrollers
• Target operating voltage range of 1.62V to 5.5V
• Draws less than 3mA from target VTref when using debugWIRE interface and less than 1mA for all
other interfaces
• Supports JTAG clock frequencies from 32kHz to 7.5MHz
• Supports PDI clock frequencies from 32kHz to 7.5MHz
• Supports debugWIRE baud rates from 4kbit/s to 0.5Mbit/s
• Supports aWire baud rates from 7.5kbit/s to 7Mbit/s
• Supports SPI clock frequencies from 8kHz to 5MHz
• Supports UPDI baud rates from up to 750kbit/s
• Supports SWD clock frequencies from 32kHz to 10MHz
• USB 2.0 high-speed host interface
• ITM serial trace capture at up to 3MB/s
• Supports DGI SPI and USART interfaces when not debugging or programming
• Supports 10-pin 50-mil JTAG connector with both AVR and Cortex pinouts. The standard probe
cable supports AVR 6-pin ISP/PDI/TPI 100-mil headers as well as 10-pin 50-mil. An adapter is
available to support 6-pin 50-mil, 10-pin 100-mil, and 20-pin 100-mil headers. Several kit options
are available with different cabling and adapters.
Atmel Atmel-ICE [USER GUIDE]
Atmel-42330C-Atmel-ICE_User Guide-10/2016
5
1.3. System Requirements
The Atmel-ICE unit requires that a front-end debugging environment Atmel Studio version 6.2 or later is
installed on your computer.
The Atmel-ICE should be connected to the host computer using the USB cable provided, or a certified
Micro-USB cable.
Atmel Atmel-ICE [USER GUIDE]
Atmel-42330C-Atmel-ICE_User Guide-10/2016
6
2. Getting Started with the Atmel-ICE
2.1. Full Kit Contents
The Atmel-ICE full kit contains these items:
• Atmel-ICE unit
• USB cable (1.8m, high-speed, Micro-B)
• Adapter board containing 50-mil AVR, 100-mil AVR/SAM, and 100-mil 20-pin SAM adapters
• IDC flat cable with 10-pin 50-mil connector and 6-pin 100-mil connector
• 50-mil 10-pin mini squid cable with 10 x 100-mil sockets
Figure 2-1. Atmel-ICE Full Kit Contents
2.2. Basic Kit Contents
The Atmel-ICE basic kit contains these items:
• Atmel-ICE unit
• USB cable (1.8m, high-speed, Micro-B)
• IDC flat cable with 10-pin 50-mil connector and 6-pin 100-mil connector
Atmel Atmel-ICE [USER GUIDE]
Atmel-42330C-Atmel-ICE_User Guide-10/2016
7
Figure 2-2. Atmel-ICE Basic Kit Contents
2.3. PCBA Kit Contents
The Atmel-ICE PCBA kit contains these items:
• Atmel-ICE unit without plastic encapsulation
Figure 2-3. Atmel-ICE PCBA Kit Contents
2.4. Spare Parts Kits
The following spare parts kits are available:
• Adapter kit
• Cable kit
Atmel Atmel-ICE [USER GUIDE]
Atmel-42330C-Atmel-ICE_User Guide-10/2016
8
Figure 2-4. Atmel-ICE Adapter Kit Contents
Figure 2-5. Atmel-ICE Cable Kit Contents
2.5. Kit Overview
The Atmel-ICE kit options are shown diagrammatically here:
Figure 2-6. Atmel-ICE Kit Overview
PCBA kit
PCBA
full kit
basic kit
adapter kit
cable kit
SAM AVR
Atmel Atmel-ICE [USER GUIDE]
Atmel-42330C-Atmel-ICE_User Guide-10/2016
9
2.6. Assembling the Atmel-ICE
The Atmel-ICE unit is shipped with no cables attached. Two cable options are provided in the full kit:
• 50-mil 10-pin IDC flat cable with 6-pin ISP and 10-pin connectors
• 50-mil 10-pin mini-squid cable with 10 x 100-mil sockets
Figure 2-7. Atmel-ICE Cables
For most purposes, the 50-mil 10-pin IDC flat cable can be used, connecting either natively to its 10-pin
or 6-pin connectors, or connecting via the adapter board. Three adapters are provided on one small
PCBA. The following adapters are included:
• 100-mil 10-pin JTAG/SWD adapter
• 100-mil 20-pin SAM JTAG/SWD adapter
• 50-mil 6-pin SPI/debugWIRE/PDI/aWire adapter
Figure 2-8. Atmel-ICE Adapters
Note:
A 50-mil JTAG adapter has not been provided - this is because the 50-mil 10-pin IDC cable can be used
to connect directly to a 50-mil JTAG header. For the part number of the component used for the 50-mil
10-pin connector, see Atmel-ICE Target Connectors Part Numbers.
The 6-pin ISP/PDI header is included as part of the 10-pin IDC cable. This termination can be cut off if it
is not required.
To assemble your Atmel-ICE into its default configuration, connect the 10-pin 50-mil IDC cable to the unit
as shown below. Be sure to orient the cable so that the red wire (pin 1) on the cable aligns with the
triangular indicator on the blue belt of the enclosure. The cable should connect upwards from the unit. Be
sure to connect to the port corresponding to the pinout of your target - AVR or SAM.
Atmel Atmel-ICE [USER GUIDE]
Atmel-42330C-Atmel-ICE_User Guide-10/2016
10
Figure 2-9. Atmel-ICE Cable Connection
Figure 2-10. Atmel-ICE AVR Probe Connection
Figure 2-11. Atmel-ICE SAM Probe Connection
2.7. Opening the Atmel-ICE
Note:
For normal operation, the Atmel-ICE unit must not be opened. Opening the unit is done at your own risk.
Anti-static precautions should be taken.
The Atmel-ICE enclosure consists of three separate plastic components - top cover, bottom cover, and
blue belt - which are snapped together during assembly. To open the unit, simply insert a large flat
Atmel Atmel-ICE [USER GUIDE]
Atmel-42330C-Atmel-ICE_User Guide-10/2016
11
screwdriver into the openings in the blue belt, apply some inward pressure and twist gently. Repeat the
process on the other snapper holes, and the top cover will pop off.
Figure 2-12. Opening the Atmel-ICE (1)
Figure 2-13. Opening the Atmel-ICE (2)
Atmel Atmel-ICE [USER GUIDE]
Atmel-42330C-Atmel-ICE_User Guide-10/2016
12
Figure 2-14. Opening the Atmel-ICE(3)
To close the unit again, simply align the top and bottom covers correctly, and press firmly together.
2.8. Powering the Atmel-ICE
The Atmel-ICE is powered by the USB bus voltage. It requires less than 100mA to operate, and can
therefore be powered through a USB hub. The power LED will illuminate when the unit is plugged in.
When not connected in an active programming or debugging session, the unit will enter low-power
consumption mode to preserve your computer's battery. The Atmel-ICE cannot be powered down - it
should be unplugged when not in use.
2.9. Connecting to the Host Computer
The Atmel-ICE communicates primarily using a standard HID interface, and does not require a special
driver on the host computer. To use the advanced Data Gateway functionality of the Atmel-ICE, be sure to
install the USB driver on the host computer. This is done automatically when installing the front-end
software provided free by Atmel. See www.atmel.com for further information or to download the latest
front-end software.
The Atmel-ICE must be connected to an available USB port on the host computer using the USB cable
provided, or suitable USB certified micro cable. The Atmel-ICE contains a USB 2.0 compliant controller,
and can operate in both full-speed and high-speed modes. For best results, connect the Atmel-ICE
directly to a USB 2.0 compliant high-speed hub on the host computer using the cable provided.
2.10. USB Driver Installation
2.10.1. Windows
When installing the Atmel-ICE on a computer running Microsoft® Windows®, the USB driver is loaded
when the Atmel-ICE is first plugged in.
Note:
Be sure to install the front-end software packages before plugging the unit in for the first time.
Atmel Atmel-ICE [USER GUIDE]
Atmel-42330C-Atmel-ICE_User Guide-10/2016
13
Once successfully installed, the Atmel-ICE will appear in the device manager as a "Human Interface
Device".
Atmel Atmel-ICE [USER GUIDE]
Atmel-42330C-Atmel-ICE_User Guide-10/2016
14
3. Connecting the Atmel-ICE
A B
1 2
9
1 2
9 10
1
1
2
5
10
3.1. Connecting to AVR and SAM Target Devices
The Atmel-ICE is equipped with two 50-mil 10-pin JTAG connectors. Both connectors are directly
electrically connected, but conform to two different pinouts; the AVR JTAG header and the ARM Cortex
Debug header. The connector should be selected based on the pinout of the target board, and not the
target MCU type - for example a SAM device mounted in an AVR STK®600 stack should use the AVR
header.
Various cabling and adapters are available in the different Atmel-ICE kits. An overview of connection
options is shown.
Figure 3-1. Atmel-ICE Connection Options
10-pin 50-mil JTAG/SWD
(Cortex debug header)
SAM AVR
20-pin 100-mil SAM
header
(for EVKs etc)
6-pin 50-mil AVR ISP/
debugWIRE/PDI/aWire/
TPI header
10-pin 100-mil
JTAG/SWD header
SAM AVR
10-pin 50-mil AVR
JTAG header
6-pin 100-mil AVR ISP/
debugWIRE/PDI/aWire/
TPI header
10-pin 100-mil AVR
JTAG header
The red wire marks pin 1 of the 10-pin 50-mil connector. Pin 1 of the 6-pin 100-mil connector is placed to
the right of the keying when the connector is seen from the cable. Pin 1 of each connector on the adapter
is marked with a white dot. The figure below shows the pinout of the debug cable. The connector marked
A plugs into the debugger while the B side plugs into the target board.
Figure 3-2. Debug Cable Pinout
Atmel Atmel-ICE [USER GUIDE]
Atmel-42330C-Atmel-ICE_User Guide-10/2016
15
3.2. Connecting to a JTAG Target
The Atmel-ICE is equipped with two 50-mil 10-pin JTAG connectors. Both connectors are directly
electrically connected, but conform to two different pinouts; the AVR JTAG header and the ARM Cortex
Debug header. The connector should be selected based on the pinout of the target board, and not the
target MCU type - for example a SAM device mounted in an AVR STK600 stack should use the AVR
header.
The recommended pinout for the 10-pin AVR JTAG connector is shown in Figure 4-6.
The recommended pinout for the 10-pin ARM Cortex Debug connector is shown in Figure 4-2.
Direct connection to a standard 10-pin 50-mil header
Use the 50-mil 10-pin flat cable (included in some kits) to connect directly to a board supporting this
header type. Use the AVR connector port on the Atmel-ICE for headers with the AVR pinout, and the SAM
connector port for headers complying with the ARM Cortex Debug header pinout.
The pinouts for both 10-pin connector ports are shown below.
Connection to a standard 10-pin 100-mil header
Use a standard 50-mil to 100-mil adapter to connect to 100-mil headers. An adapter board (included in
some kits) can be used for this purpose, or alternatively the JTAGICE3 adapter can be used for AVR
targets.
Important:
The JTAGICE3 100-mil adapter cannot be used with the SAM connector port, since pins 2 and
10 (AVR GND) on the adapter are connected.
Connection to a custom 100-mil header
If your target board does not have a compliant 10-pin JTAG header in 50- or 100-mil, you can map to a
custom pinout using the 10-pin "mini-squid" cable (included in some kits), which gives access to ten
individual 100-mil sockets.
Connection to a 20-pin 100-mil header
Use the adapter board (included in some kits) to connect to targets with a 20-pin 100-mil header.
Table 3-1. Atmel-ICE JTAG Pin Description
Name AVR
port
pin
SAM
port
pin
Description
TCK 1 4 Test Clock (clock signal from the Atmel-ICE into the target device).
TMS 5 2 Test Mode Select (control signal from the Atmel-ICE into the target device).
TDI 9 8 Test Data In (data transmitted from the Atmel-ICE into the target device).
TDO 3 6 Test Data Out (data transmitted from the target device into the Atmel-ICE).
nTRST 8 - Test Reset (optional, only on some AVR devices). Used to reset the JTAG
TAP controller.
Atmel Atmel-ICE [USER GUIDE]
Atmel-42330C-Atmel-ICE_User Guide-10/2016
16
Name AVR
port
pin
SAM
port
pin
nSRST 6 10 Reset (optional). Used to reset the target device. Connecting this pin is
recommended since it allows the Atmel-ICE to hold the target device in a
reset state, which can be essential to debugging in certain scenarios.
VTG 4 1 Target voltage reference. The Atmel-ICE samples the target voltage on this
pin in order to power the level converters correctly. The Atmel-ICE draws
less than 3mA from this pin in debugWIRE mode and less than 1mA in
other modes.
GND 2, 10 3, 5, 9 Ground. All must be connected to ensure that the Atmel-ICE and the target
device share the same ground reference.
3.3. Connecting to an aWire Target
The aWire interface requires only one data line in addition to VCC and GND. On the target this line is the
nRESET line, although the debugger uses the JTAG TDO line as the data line.
The recommended pinout for the 6-pin aWire connector is shown in Figure 4-8.
Connection to a 6-pin 100-mil aWire header
Description
Use the 6-pin 100-mil tap on the flat cable (included in some kits) to connect to a standard 100-mil aWire
header.
Connection to a 6-pin 50-mil aWire header
Use the adapter board (included in some kits) to connect to a standard 50-mil aWire header.
Connection to a custom 100-mil header
The 10-pin mini-squid cable should be used to connect between the Atmel-ICE AVR connector port and
the target board. Three connections are required, as described in the table below.
Table 3-2. Atmel-ICE aWire Pin Mapping
Atmel-ICE AVR port pins Target pins Mini-squid pin aWire pinout
Pin 1 (TCK) 1
Pin 2 (GND) GND 2 6
Pin 3 (TDO) DATA 3 1
Pin 4 (VTG) VTG 4 2
Pin 5 (TMS) 5
Pin 6 (nSRST) 6
Pin 7 (Not connected) 7
Pin 8 (nTRST) 8
Pin 9 (TDI) 9
Pin 10 (GND) 0
Atmel Atmel-ICE [USER GUIDE]
Atmel-42330C-Atmel-ICE_User Guide-10/2016
17
3.4. Connecting to a PDI Target
The recommended pinout for the 6-pin PDI connector is shown in Figure 4-11.
Connection to a 6-pin 100-mil PDI header
Use the 6-pin 100-mil tap on the flat cable (included in some kits) to connect to a standard 100-mil PDI
header.
Connection to a 6-pin 50-mil PDI header
Use the adapter board (included in some kits) to connect to a standard 50-mil PDI header.
Connection to a custom 100-mil header
The 10-pin mini-squid cable should be used to connect between the Atmel-ICE AVR connector port and
the target board. Four connections are required, as described in the table below.
Important:
The pinout required is different from the JTAGICE mkII JTAG probe, where PDI_DATA is
connected to pin 9. The Atmel-ICE is compatible with the pinout used by the Atmel-ICE,
JTAGICE3, AVR ONE!, and AVR Dragon™ products.
Table 3-3. Atmel-ICE PDI Pin Mapping
Atmel-ICE AVR port pin Target pins Mini-squid pin Atmel STK600 PDI pinout
Pin 1 (TCK) 1
Pin 2 (GND) GND 2 6
Pin 3 (TDO) PDI_DATA 3 1
Pin 4 (VTG) VTG 4 2
Pin 5 (TMS) 5
Pin 6 (nSRST) PDI_CLK 6 5
Pin 7 (not connected) 7
Pin 8 (nTRST) 8
Pin 9 (TDI) 9
Pin 10 (GND) 0
3.5. Connecting to a UPDI Target
The recommended pinout for the 6-pin UPDI connector is shown in Figure 4-12.
Connection to a 6-pin 100-mil UPDI header
Use the 6-pin 100-mil tap on the flat cable (included in some kits) to connect to a standard 100-mil UPDI
header.
Connection to a 6-pin 50-mil UPDI header
Use the adapter board (included in some kits) to connect to a standard 50-mil UPDI header.
Atmel Atmel-ICE [USER GUIDE]
Atmel-42330C-Atmel-ICE_User Guide-10/2016
18
Connection to a custom 100-mil header
The 10-pin mini-squid cable should be used to connect between the Atmel-ICE AVR connector port and
the target board. Three connections are required, as described in the table below.
Table 3-4. Atmel-ICE UPDI Pin Mapping
Atmel-ICE AVR port pin Target pins Mini-squid pin Atmel STK600 UPDI pinout
Pin 1 (TCK) 1
Pin 2 (GND) GND 2 6
Pin 3 (TDO) UPDI_DATA 3 1
Pin 4 (VTG) VTG 4 2
Pin 5 (TMS) 5
Pin 6 (nSRST) [/RESET sense] 6 5
Pin 7 (Not connected) 7
Pin 8 (nTRST) 8
Pin 9 (TDI) 9
Pin 10 (GND) 0
3.6. Connecting to a debugWIRE Target
The recommended pinout for the 6-pin debugWIRE (SPI) connector is shown in Table 3-6.
Connection to a 6-pin 100-mil SPI header
Use the 6-pin 100-mil tap on the flat cable (included in some kits) to connect to a standard 100-mil SPI
header.
Connection to a 6-pin 50-mil SPI header
Use the adapter board (included in some kits) to connect to a standard 50-mil SPI header.
Connection to a custom 100-mil header
The 10-pin mini-squid cable should be used to connect between the Atmel-ICE AVR connector port and
the target board. Three connections are required, as described in Table 3-5.
Although the debugWIRE interface only requires one signal line (RESET), VCC and GND to operate
correctly, it is advised to have access to the full SPI connector so that the debugWIRE interface can be
enabled and disabled using SPI programming.
When the DWEN fuse is enabled the SPI interface is overridden internally in order for the OCD module to
have control over the RESET pin. The debugWIRE OCD is capable of disabling itself temporarily (using
the button on the debugging tab in the properties dialog in Atmel Studio), thus releasing control of the
RESET line. The SPI interface is then available again (only if the SPIEN fuse is programmed), allowing
the DWEN fuse to be un-programmed using the SPI interface. If power is toggled before the DWEN fuse
is un-programmed, the debugWIRE module will again take control of the RESET pin.
Note:
It is highly advised to simply let Atmel Studio handle setting and clearing of the DWEN fuse.
Atmel Atmel-ICE [USER GUIDE]
Atmel-42330C-Atmel-ICE_User Guide-10/2016
19
Loading...