Debug Connector - Silicon Laboratories SLWRB4150A User Manual

4.3 Debug Connector

The Debug Connector serves multiple purposes based on the "debug mode" setting which can be configured in Simplicity Studio. When
mode is set to "Debug IN", this connector allows an external debug emulator to be used with the radio board EFR32. When set to "De-
bug OUT", this connector allows the kit to be used as a debugger towards an external target. When set to "Debug MCU" (default), this
connector is isolated from the debug interface of both the Board Controller and the on-board target device.
Because this connector is automatically switched to support the different operating modes, it is only available when the Board Controller
is powered (J-Link USB cable connected). If debug access to the target device is required when the Board Controller is unpowered, this
should be done by connecting 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
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1
VTARGET
GND 3
5
GND
7
NC
9
Cable Detect
NC 11
13
NC
GND 15
GND 17
GND 19
Figure 4.4. Debug Connector
Table 4.2. Debug Connector Pin Descriptions
Description
Target voltage on the debugged application.
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
UG178: EFR32MG 2400/868 MHz 13 dBm Dual Band Radio Board
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. 1.00 | 7