2013-06-13 02:33 AM
Hello, is JTAG faster than SWD? Thank you very much for answer.
2013-06-13 02:51 AM
2013-06-13 08:06 AM
From memory - past read (on ARM's site) that during debug/programming - the newer SWD is faster than JTAG. (and indeed - suffers the limitation Clive mentions)
Using paid IAR - we've noted ~ 10-15% faster code downloads (>200KB) when switching from JTAG to SWD. (using JLink - all else held as consistent as possible) SWD switches the single data line between transmit & receive - thus may suffer when large data reads from the MCU are required... And - 2 of the JTAG pins may be ''harvested'' for use as GPIO - when SWD is chosen...