ARM Standard JTAG 콘넥터는 2.54 피치이며, Cortex debug 콘넥터와 Cortex debug + ETM 콘넥터는 1.27 피치입니다. A 10-pin header (Samtec FTSH-105-01) is specified with dimensions: 0.25″ x 0.188″ (6.35mm x 4.78mm). Dimensions of the ARM JTAG Connector are 1.29″ x 0.722″ (33mm x 18.5mm). A 20-pin header (Samtec FTSH-110-01) is specified with dimensions: 0.50″ x 0.188″ (12.70mm x 4.78mm).
Debug and Trace Connectors for Cortex-M devices.
Cortex Debug Connector (10-pin)
ARM Standard JTAG Connector (20-pin)
Cortex Debug+ETM Connector (20-pin)
출처 : http://www.keil.com/coresight/connectors.asp