User manual

Atmel-ICE [USER GUIDE]
42330A-MCU-07/2014
18
The ARM SWD interface is s subset of the JTAG interface, making use of TCK and TMS pins, which means
that when connecting to an SWD device, the 10-pin JTAG connector can technically be used. The ARM JTAG
and AVR JTAG connectors are however not pin-compatible, so this depends upon the layout of the target board
in use. When using STK600 or a board making use of the AVR JTAG pinout, the AVR connector port on the
Atmel-ICE must be used. When connecting to a board which makes use of the ARM JTAG pinout, the SAM
connector port on the Atmel-ICE must be used.
The recommended pinout for the 10-pin Cortex Debug connector is shown in Figure 4-10, “Recommended
ARM SWD/JTAG Header Pinout” on page 23.
Connection to a 10-pin 50-mil Cortex header
Use the flat cable (included in some kits) to connect to a standard 50-mil Cortex header.
Connection to a 10-pin 100-mil Cortex-layout header
Use the adapter board (included in some kits) to connect to a 100-mil Cortex-pinout header.
Connection to a 20-pin 100-mil SAM header
Use the adapter board (included in some kits) to connect to a 20-pin 100-mil SAM header.
Connection to a custom 100-mil header
The 10-pin mini-squid cable should be used to connect between the Atmel-ICE AVR or SAM connector port
and the target board. Six connections are required, as described in the table below.
Table 3-7. Atmel-ICE SWD Pin Mapping
Name AVR
port
pin
SAM
port
pin
Description
SWDCLK 1 4 Serial Wire Debug Clock.
SWDIO 5 2 Serial Wire Debug Data Input/Output.
SWO 3 6 Serial Wire Output (optional- not implemented on all devices).
nSRST 6 10 Reset.
VTG 4 1 Target voltage reference.
GND 2, 10 3, 5 Ground.