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2010-11-12 - t0008_1.01
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10.2 Expansion header
A 20 pin expansion header can be used to connect plugin boards. This contains a selection of I/O plus
powers and ground. See the pinout in the table below.
Table 10.3. Expansion header pinout
I/O
#
#
I/O
GND
1
2
VMCU
PC4
3
4
PD0
PC5
5
6
PD1
PC12
7
8
PD2
PE2
9
10
PD3
PB11
11
12
PD4
PB12
13
14
PD5
PD7
15
16
PD6
PD8
17
18
5V
GND
19
20
3V3
Table 10.4. Expansion header pin list
EXP header pin
number
MCU GPIO pin
MCU GPIO pin functions
1
GND
Ground
2
VMCU
MCU supply voltage
3
PC4
USART2_CLK #0 / LETIMER_OUT0 #3 / PCNT1_S0IN #0 / ACMP0_CH4
4
PD0
USART1_TX #1 / PCNT2_S0IN #0 / ADC0_CH0
5
PC5
USART2_CS #0 / LETIMER_OUT1 #3 / PCNT1_S1IN #0 / ACMP0_CH5
6
PD1
TIMER0_CC0 #3 / USART1_RX #1 / PCNT2_S1IN #0 / ADC0_CH1
7
PC12
CMU_CLKOUT0 #1 / ACMP1_CH4
8
PD2
TIMER0_CC1 #3 / USART1_CLK #1 / ADC0_CH2
9
PE2
ACMP0 _OUT #1
10
PD3
TIMER0_CC2 #3 / USART1_CS #1 / ADC0_CH3
11
PB11
LETIMER0_OUT0 #1 / DAC0_OUT0
12
PD4
LEUART0_TX #0 / ADC0_CH4
13
PB12
LETIMER0_OUT1 #1 / DAC0_OUT1
14
PD5
LEUART0_RX #0 / ADC0_CH5
15
PD7
LETIMER0_OUT1 #0 / I2C0_SCL #1 / ADC0_CH7
16
PD6
LETIMER0_OUT0 #0 / I2C0_SDA #1 / ADC0_CH6
17
PD8
CMU_CLKOUT1 #1 / ADC0_VCM
18
5V
USB Power
19
GND
Ground
20
3V3
3.3V board power
