Preliminary
...the world's most energy friendly microcontrollers
2010-04-09 - t0005_1.10
33
www.energymicro.com
12 Connectors
12.1 EFM32 and EXP32 connectors
The EFM32 connector is used to connect the MCU plugin board to the main board, and the EXP32
connector is used to connect the prototype card to the main board. The EFM32_A connector and the first
16 pins of the EFM32_B connector is directly connected to the corresponding pins on the EXP32_A and
EXP32_B connectors. These signals duplicate the MCU ports to the port headers on the prototype board.
Some care must be taken when fitting and removing the plugin cards. Make sure that the plugin boards
sits properly in place to ensure good connections. The connectors are rated for 100 plugin cycles.
For pinout check the schematics.
12.2 Debug connector
This connector is used for Debug In and Debug Out (see Debug chapter). The pinout is described in
the table.
Table 12.1. Debug connector pinout
Pin
number
Function
Note
1
VTARGET
Target voltage on the debugged application.
2
NC
3
/TRST
JTAG tap reset
4
GND
5
TDI
JTAG data in
6
GND
7
TMS/SWDIO
JTAG TMS or Serial Wire data I/O
8
GND
9
TCK
JTAG TCK or Serial Wire clock
10
GND
11
RTCK
JTAG RTCK
12
GND
13
TDO/SWO
JTAG TDO or Serial Wire Output
14
GND
15
/RESET
Target MCU reset
16
GND
17
PD
This pin has a 100k pulldown.
18
Cable detect
This signal must be pulled to ground by the external debugger or application for cable
insertion detection.
19
PD
This pin has a 100k pulldown.
20
GND
electronic components distributor
