Kontron SMARC-sA3874i - Manual (Page 66)

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User’s Guide
CPLD JTAG Connector: JST SM08B-SRSS-TB, 1mm pitch R/A SMD Header.
Pin # Signal Notes
1 V_3V3_S0_CPLD_JTAG 3.3 Volts
2 CPLD_JTAG_TDI
3 CPLD_JTAG_TCK
4 CPLD_JTAG_TMS
5 CPLD_JTAG_TDO
6 CPLD_JTAG_TRST Connected to Ground through resistor
7 No Connect
8 GND
Caution! The JTAG port is for internal use only. Do not connect any devices.