User`s guide

USB

Controller

Level

Converter

Vdd from

target

Vdd (local)

CC Debugger

TARGET

Target

Connector

109

GND

DC (Debug Clock)

Csn (SPI Chip Select)

RESETn

3.3V (from debugger)

Target Voltage Sense

DD (Debug Data)

SCLK (SPI Clock)

MOSI (SPI Data Out)

MISO (SPI Data In)

Connecting the CC Debugger to the Device

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Figure 4. Target Connector Pin-Out

Note the concept with the target voltage sense signal. This signal is used by the level converters on the

CC Debugger to handle different voltage levels on the target board and the debugger. Pin 2 on the target

connector must be connected to VDD on the target board.

Figure 5. Voltage From Target to CC Debugger

Alternatively, it is possible to power the target by connecting pin 9 to VDD on the target. In that case, the

CC Debugger supplies 3.3 V to the target.

6.2 Connecting the CC Debugger to a System-on-Chip

6.2.1 Minimum Connection for Debugging

For successful debugging of a TI 8051-based RF SoC, connect the two debug signals Debug Data (DD)

and Debug Clock (DC) and the reset signal RESETn to the device. Note that DD is a bidirectional signal.

In addition, the CC Debugger must be connected to GND and VDD on the board. VDD is used as an input

to the level shifters on the CC Debugger, thus allowing a different operating voltage on the target than

internally on the debugger.

For CC111x, CC251x, CC243x, CC253x and CC254x, except CC2544 and CC2545, connect the DD

signal to pin P2.1 and DC to pin P2.2.

For CC2544, connect the DD signal to P1.3 and DC to P1.2.

For CC2545, connect the DD signal to P1.3 and DC to P1.4.

Note that it is possible to power the target board from the debugger by connecting the 3.3 V signal on pin

9 on the connector to the target board.

CC Debugger SWRU197H–September 2010–Revised April 2014

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