Texas Instruments CC2511 - Manual (Page 19)

CC2511 Dongle
8.3 Debug connector
The CC2511 Dongle has debug connector (P3) that is compatible with the SoC debug
connector on the SmartRF04EB. This enables the CC2511 Dongle to be programmed and
debugged via the SmartRF04EB. The debug connector and the test pins on the CC2511
Dongle can be removed to reduce its size. If that is done, programming and debugging can
still be done using the connector on the back of the CC2511 Dongle (P5). The pin-out of the
debug connector (P3) is given in Table 2.
Pin Function
1 GND
2 VDD
3
P2_2 / debug clock
4 P2_1 / debug data
5 P1_4
6 P1_5
7 RESET_N
8 P1_6
9
Not connected (VDD by mounting R6, 0 Ohm)
10 P1_7
Table 2 Debug connector (P3) pin-out
8.4 General purpose I/O connectors
All GPIO pins on the CC2511 that are not used on the Dongle are routed to the P4 “Test pins”
pin-row. They can be used for debugging or to connect external devices to the CC2511. The
pin-out is given in Table 3.
Pin Function
1 P2_0
2 GND
3 P0_5
4 P0_4
5 P0_3
6 P0_2
7 P0_1
8 P0_0
9 VDD
10 P1_3
Table 3: Test pins (P4) pin-out
8.5 Cutaway section
On the CC2511 Dongle the debug connector and the GPIO test-pin connector is mounted on
a section of the Dongle that may be removed to minimise the CC2511 Dongle size. This
cutaway section is marked with a white line, see Figure 11. If this section is removed from the
dongle, the CC2511 can still be programmed and debugged using the alternative debug
connector found on the back of the CC2511 Dongle, see Figure 12.
8.6 RF Performance of PCB antenna
The performance of the PCB antenna will be affected by the device the CC2511 USB dongle
is connected to. Thus, when plugged into different computers or a USB extension cable
differences in the CC2511 USB dongle RF performance must be expected. The maximum
antenna gain measured with this design is 5.3 dBi. Thus, duty cycling or reduction of output
power might be needed to ensure compliance with regulatory limits, see application note
AN032 for more information about SRD regulations in the 2.4 GHz ISM band. AN032 is
available from www.ti.com/lpw or www.chipcon.com.
SWRU082 Page 19 of 24