Atmel SAM4S Xplained Pro [USER GUIDE]
Atmel-42075B-MCU-Atmel SAM4S Xplained Pro-USER GUIDE-03/2013
10
Pin number
Name
RGB interface
description
MCU interface
description
45
IRQ2
Interrupt line for other I2C devices
46
PWM
Backlight control
47
RESET
Reset for both display and maxTouch
48
VCC
3.3V power supply for extension board
49
VCC
3.3V power supply for extension board
50
GND
Ground
3.4.3
Power header
The power header can be used to connect external power to the SAM4S Xplained Pro kit. The kit will
automatically detect and switch to the external power if supplied. The power header can also be used as supply
for external peripherals or extension boards. Care must be taken not to exceed the total current limitation of the
on-board regulator for the 3.3V regulated output. To locate the current measurement header, please refer to
Figure 1.1, “SAM4S Xplained Pro evaluation kit overview”
Table 3.6. Power header PWR
Pin number PWR header
Pin name
Description
1
VEXT_P5V0
External 5V input
2
GND
Ground
3
VCC_P5V0
Unregulated 5V (output, derived
from one of the input sources)
4
VCC_P3V3
Regulated 3.3V (output, used as
main power for the kit)
Note
If the board is powered from a battery source it is recommended to use the PWR header. If there
is a power source connected to EDBG USB, the EDBG is activated and it will consume more
power.
