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Atmel-ICE [USER GUIDE]

42330A-MCU-07/2014

Note

The SPI interface is effectively disabled when the debugWIRE enable fuse (DWEN) is

programmed, even if SPIEN fuse is also programmed. To re-enable the SPI interface, the 'disable

debugWIRE' command must be issued while in a debugWIRE debugging session. Disabling

debugWIRE in this manner requires that the SPIEN fuse is already programmed. If Atmel Studio

fails to disable debugWIRE, it is probable that the SPIEN fuse is NOT programmed. If this is the

case, it is necessary to use a high-voltage programming interface to program the SPIEN fuse.

Table 3-5. Atmel-ICE SPI Pin Mapping

Atmel-ICE AVR port

pins

Target pins Mini-squid pin SPI pinout

Pin 1 (TCK) SCK 1 3

Pin 2 (GND) GND 2 6

Pin 3 (TDO) MISO 3 1

Pin 4 (VTG) VTG 4 2

Pin 5 (TMS) 5

Pin 6 (nSRST) /RESET 6 5

Pin 7 (Not connected) 7

Pin 8 (nTRST) 8

Pin 9 (TDI) MOSI 9 4

Pin 10 (GND) 0

3.7 Connecting to a TPI Target

The recommended pinout for the 6-pin TPI connector is shown in Figure 4-9, “TPI Header

Pinout” on page 23.

Connection to a 6-pin 100-mil TPI header

Use the 6-pin 100-mil tap on the flat cable (included in some kits) to connect to a standard 100-mil TPI header.

Connection to a 6-pin 50-mil TPI header

Use the adapter board (included in some kits) to connect to a standard 50-mil TPI 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. Six connections are required, as described in Table 3-6, “Atmel-ICE TPI Pin

Mapping” on page 17.

Table 3-6. Atmel-ICE TPI Pin Mapping

Atmel-ICE AVR port

pins

Target pins Mini-squid pin TPI pinout

Pin 1 (TCK) CLOCK 1 3