Energy micro EFM32 Giant Gecko Starter Kit, User Manual

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9 Connectors
9.1 Breakout pads
Many of the EFM32's pins are routed out to "breakout pads" at the top and bottom edges of the kit. A
2.54mm pitch pin header can be soldered in for easy access to these pins. Most I/O pins are available,
with the exception of pins used to drive the LCD and some pins used to drive the NAND flash.
Note
Some of the breakout pads are shared by on-board EFM peripherals. The schematic must
be consulted to make sure that it is OK to use a shared pin in your application.
Figure 9.1. Breakout pads and Expansion Header
S
W
C
LK
5
V
P
A
1
2
P
A
1
3
P
A
1
4
G
N
D
P
E
0
P
E
1
P
E
2
P
E
3
G
N
D
P
C
0
P
C
1
P
C
2
P
C
7
G
N
D
P
F
8
P
F
9
V
M
C
U
3
V
3
3 V 3
5 V
PD 6
PD 5
PD 4
PD 3
PD 2
PD 1
PD 0
V M CU 20
18
16
14
12
10
8
6
4
2
G
N
D
R
E
S
E
T
#
S
W
D
IO
S
W
O
5
V
P
B
1
0
P
B
9
G
N
D
P
B
1
1
P
B
1
2
P
D
1
5
G
N
D
P
D
0
P
D
1
P
D
2
P
D
3
P
D
4
P
D
5
G
N
D
P
D
6
P
D
7
P
D
8
P
D
1
3
P
D
1
4
V
M
C
U
3
V
3
Debug Pins
Expansion Header
19
17
15
13
11
9
7
5
3
1 GN D
PC0
PC3
PC4
PC5
PB1 1
PB1 2
PD 7
PC6
GN D
Debug Connect or
Note
Pins PC3, PC4, PC5 and PC6 are also available as surface mounted pads beneath the
USB Micro-AB connector
9.2 Expansion header
On the right hand side of the board an angled 20 pin expansion header is provided to allow connection of
peripherals or plugin boards. The connecter contains a number of I/O pins that can be used with most of
the EFM32 Giant Gecko's features. Additionally, the VMCU, 3V3 and 5V power rails are also exported.
Figure Figure 9.1 (p. 15) shows the pin assignment of the expansion header. With the exception of
a few pins, most of the Expansion Header's pins are the same as those on the EFM32 Gecko or EFM32
Tiny Gecko starter kits.
Some of the chip peripheral functions that are available on the Expansion Header are listed in table
Table 9.1 (p. 16) .