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Navigation: Active Probes > Arm HSSTP II > Device description

40-pin Samtec ERF8 to 10-pin 1.27mm CoreSight + 40-pin Samtec ERF8 HSSTP Converter

Ordering code

IASAM40HSSTP-JTAGSAM

Normally 40-pin ERF8 ARM HSSTP connector provides both, ARM HHSTP trace interface and JTAG or SWD debug interface. However, some targets for some reason don’t connect debug interface to this connector and provide the debug JTAG/SWD interface on a separate debug connector (10-pin 1.27mm CoreSight). Using this adapter, the Active Probe can be properly connected to such target.

Warning_orange

This converter is required only when the Active Probe is to be connected to the embedded target where the 40-pin Samtec ERF8 target debug connector doesn’t have the debug JTAG/SWD interface physically connected but has it connected instead to the available 10-pin 1.27 mm CoreSight target debug connector.

The adapter doesn’t come along the Active Probe and has to be ordered separately.

The converter has the following pinouts:

A – 40-pin Samtec ERF8 connector providing merged JTAG/SWD debug signals (C on the image) and the HSSTP trace signals (B on the image) signals, to which the Active Probe connects then.

Signal Direction	Signal Description	Signal	Pin	Pin	Signal	Signal Description	Signal Direction
O	HSSTP Lane 4	Tx4_P	1	2	Vref	Reference Voltage	I
O	HSSTP Lane 4	Tx4_N	3	4	TCK	JTAG	O
	Ground	GND	5	6	GND	Ground
O	HSSTP Lane 2	Tx2_P	7	8	NC	Not Connected
O	HSSTP Lane 2	Tx2_N	9	10	NC	Not Connected
	Ground	GND	11	12	GND	Ground
O	HSSTP Lane 2	Tx0_P	13	14	TDI	JTAG	O
O	HSSTP Lane 2	Tx0_N	15	16	TDO	JTAG	O
	Ground	GND	17	18	GND	Ground
O	HSSTP Clock	CLK_P	19	20	nRESET	Reset	O
O	HSSTP Clock	CLK_N	21	22	NC	Not Connected
	Ground	GND	23	24	GND	Ground
O	HSSTP Lane 1	Tx1_P	25	26	NC	Not Connected
O	HSSTP Lane 1	Tx1_N	27	28	NC	Not Connected
	Ground	GND	29	30	GND	Ground
O	HSSTP Lane 3	Tx3_P	31	32	NC	Not Connected
O	HSSTP Lane 3	Tx3_N	33	34	NC	Not Connected
	Ground	GND	35	36	Reserved
O	HSSTP Lane 5	Tx5_P	37	38	Reserved
O	HSSTP Lane 5	Tx5_N	39	40	Reserved

40-pin Samtec ERF8 pinout

B – 40-pin Samtec ERF8 connector which connects to target development board with 40-pin Samtec ERF8 connector exposing only the HSSTP trace signals.

Signal Direction	Signal Description	Signal	Pin	Pin	Signal	Signal Description	Signal Direction
O	HSSTP Lane 4	Tx4_P	1	2	Vref	Reference Voltage	I
O	HSSTP Lane 4	Tx4_N	3	4		JTAG	O
	Ground	GND	5	6	GND	Ground
O	HSSTP Lane 2	Tx2_P	7	8	NC	Not Connected
O	HSSTP Lane 2	Tx2_N	9	10	NC	Not Connected
	Ground	GND	11	12	GND	Ground
O	HSSTP Lane 2	Tx0_P	13	14		JTAG	O
O	HSSTP Lane 2	Tx0_N	15	16		JTAG	O
	Ground	GND	17	18	GND	Ground
O	HSSTP Clock	CLK_P	19	20		Reset	O
O	HSSTP Clock	CLK_N	21	22	NC	Not Connected
	Ground	GND	23	24	GND	Ground
O	HSSTP Lane 1	Tx1_P	25	26	NC	Not Connected
O	HSSTP Lane 1	Tx1_N	27	28	NC	Not Connected
	Ground	GND	29	30	GND	Ground
O	HSSTP Lane 3	Tx3_P	31	32	NC	Not Connected
O	HSSTP Lane 3	Tx3_N	33	34	NC	Not Connected
	Ground	GND	35	36	Reserved
O	HSSTP Lane 5	Tx5_P	37	38	Reserved
O	HSSTP Lane 5	Tx5_N	39	40	Reserved

40-pin Samtec ERF8 pinout

Blue colored signals are trace signals.

C – 10-pin CoreSight connector which connects to the target development board exposing JTAG/SWD debug interface.

Signal Direction	Signal Description	Signal	Pin	Pin	Signal	Signal Description	Signal Direction
I	Reference Voltage	Vref	1	2	SWDIO/TMS	SWD/JTAG	I/O
	Ground	GND	3	4	SWCLK/TCK	SWD/JTAG	O
	Ground	GND	5	6	SWO/TDO	SWD/JTAG	I
	Not Connected	KEY	7	8	NC/TDI	Not Connected / JTAG	O
	Ground	GND	9	10	nRESET	Reset	I/O

10-pin CoreSight pinout

Signal Direction is described from the BlueBox perspective.

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