Debug Connector - Silicon Laboratories SLWSTK6240A User Manual

3.5 Debug Connector

The Debug Connector serves multiple purposes based on the "debug mode" setting which can be configured in Simplicity Studio. When
the debug mode is set to "Debug IN", the debug connector can be used to connect an external debugger to the EZR32 on the radio
board. When set to "Debug OUT", this connector allows the kit to be used as a debugger towards an external target. When set to "De-
bug MCU" (default), the connector is isolated from both the on-board debugger and the radio board target device.
Because this connector is electronically switched between the different operating modes, it can only be used when the Board Controller
is powered (i.e. J-Link USB cable connected). If debug access to the target device is required when the Board Controller is unpowered,
connect directly to the appropriate breakout pins.
The pinout of the connector follows that of the standard ARM Cortex Debug+ETM 19-pin connector. The pinout is described in detail
below. Even though the connector has support for both JTAG and ETM Trace, it does not necessarily mean that the kit or the on-board
target device supports this.
Note: The pinout matches the pinout of an ARM Cortex Debug+ETM connector, but these are not fully compatible as pin 7 is physically
removed from the Cortex Debug+ETM connector. Some cables have a small plug that prevent them from being used when this pin is
present. If this is the case, remove the plug, or use a standard 2x10 1.27 mm straight cable instead.
Pin number(s) Function
1 VTARGET
2 TMS / SDWIO / C2D
4 TCK / SWCLK / C2CK JTAG test clock, Serial Wire clock or C2 clock
6 TDO/SWO
8 TDI / C2Dps
10 RESET / C2CKps
12 TRACECLK
14 TRACED0
16 TRACED1
18 TRACED2
20 TRACED3
9 Cable detect
11, 13 NC
3, 5, 15, 17, 19 GND
Note: Although the on-board debugger and the Debug Connector supports JTAG, the EZR32HG-series of devices do not support
JTAG.
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VTARGET 1
GND 3
GND 5
NC 7
Cable Detect 9
11
NC
NC 13
15
GND
GND 17
19
GND
Figure 3.4. Debug Connector
Table 3.2. Debug Connector Pin Descriptions
Description
Target reference voltage. Used for shifting logical signal levels between target and
debugger.
JTAG test mode select, Serial Wire data or C2 data
JTAG test data out or Serial Wire Output
JTAG test data in, or C2D "pin sharing" function
Target device reset, or C2CK "pin sharing" function
Not connected
Not connected
Not connected
Not connected
Not connected
Connect to ground
Not connected
Ground
UG190: EZR32HG 868 MHz 16 dBm Wireless Starter Kit User's Guide
2 TMS / SWDIO / C2D
4 TCK / SWCLK / C2CK
6 TDO / SWO
8
TDI / C2Dps
10 RESET / C2CKps
12
TRACECLK
14 TRACED0
16
TRACED1
18 TRACED2
20
TRACED3
Connectors
Rev. 1.01 | 11