Atmel ATSAM4C-EK User Manual page 10

3.3.3 Reset and Wake-Up Circuitry
The reset sources for the EK board are:

Power on reset
 Push button reset (refer to

JTAG reset from an in-circuit emulator
3.3.4 Power Supplies
The ATSAM4C-EK board evaluation and development platform embeds all the necessary power rails required for the
SAM4C processor and peripherals.
The ATSAM4C-EK board can be supplied by either a 5V DC block through input J2 (see
via J6 (refer to
A manual power supply selection switch (SW1) is provided to power on/off the main power line.
Figure 3-5.
3.3.5 Power Rails
The SAM4C supports 1.6V–3.6V single supply mode (VDDIN). An internal regulator input is connected to the source and
its output feeds VDDCORE (VDDOUT connected to VDDCORE).
When the 3.3V supply is present, the Power LED D5 is lit. Test points TP2 to TP5 are used to perform testing.
Table 3-2.
Power Supply
VDDIO
VDDBU
VDDIN
VDDLCD
VDDOUT
VDDPLL
VDDCORE
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Section 3.11.2 "Push
"DBGU/USB Bridge Schematic" on page
Power Supply Schematic
J2 J2
DC Power Jack DC Power Jack
D2 D2
1
2
NSR0320MW2T1G NSR0320MW2T1G
D3 D3
USB5V
NSR0320MW2T1G NSR0320MW2T1G
Power Supply Voltage Ranges
Ranges Comments
Flash Memory Charge Pumps Supply for Erase and Program Operations, and Read
operation
1.6V–3.6V
Input Output buffers Supply
Backup Area power supply. VDDBU is automatically disconnected when VDDIO is present
1.6V–3.6V
(> 1.9V)
1.6V–3.6V 1.6V min. if LCD and ADC not used, 2.5V otherwise
LCD Voltage Regulator Output
2.5V–3.6V External LCD power supply input (LCD regulator not used)
VDDIO/VDDIN need to be supplied when the LCD Controller is used
1.2V Output 120 mA Output Current
1.08V–1.32V –
1.08V–1.32V –
Buttons")
16).
U1 U1
ZEN056V130A24LS ZEN056V130A24LS
1
3
C29 C29
100nF 33µF/16V
Figure 3-5) or a USB connection
SW1 SW1
TP4 TP4
SW-SLIDE-3 SW-SLIDE-3
1
2
3
C30 C30
33µF/16V
R12 R12 1K
ATSAM4C-EK [USER GUIDE]
11251A–ATARM–16-Dec-13
5V
C31 C31
10