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Atmel ICE
This device is used to program various Atmel designed processors.
It has one serious fault, in the that sockets are wired back to front but otherwise it works well. The dumb wiring is the main reason for this page. I got it working fine once and now forget how it it's broken so need to rediscover the stupidity yet again.
I got the PCBA version of this device in 2019 for £47, they now cost £90 in 2022. Microchip outpace inflation like nobody else.
Ports
The key in the port is on the wrong side so you can either plug the cable in back to front (not recommend) or cut the notch off your cable and turn it around and plug it the right way around at the other end (recommended but I don't accept liability for any error). Maybe Atmel (now MCHP) should just employ competent engineers.
PS. MCHP will sell you mis-wired cables so you do not need to do the above, but having mis-wired cables in your collection may be even worse.
SAM AVR
KEY KEY
TMS TCK TDO TDI SRST GND VTG SRST TRST GND
2 4 6 8 10 2 4 6 8 10
1 3 5 7 9 1 3 5 7 9
VTG GND GND TRST GND TCK TDO TMS NC TDI
Both sockets contain the same signals just wired to
different pins.
SAM = JTAG standard and AVR = ATMEL non-standard.
PIN SAM AVR SWD(*) CORTEX(?)
1 VTG TCK Vref VCC/VREF
2 TMS GND SWIO SWDIO/TMS
3 GND TDO GND GND
4 TCK VTG CLK SWDCLK/TCK
5 GND TMS GND GND
6 TDO SRST SWO SWO/TDO
7 TRST NC KEY KEY
8 TDI TRST NC NC/TDI
9 GND TDI GNDd GND
10 SRST GND RST nRESET
(*) Adafruit SWD adapter
(?) Adafruit Cortex SWD adapter
JTAG ATMEGA2560 ATMEGA32
VTG VCC VCC
GND GND GND
TCK PF4 PC2
TDO PF6 PC4
TMS PF5 PC3
TDI PF7 PC5
JTAG SPI
VTG VCC
GNG GND
TCK SCK
TDO MISO
TDI MOSI
SRST RESET
