Atmel ARM-Based Evaluation Kit AT91SAM9N12-EK AT91SAM9N12-EK Data Sheet
Product codes
AT91SAM9N12-EK
4-6
SAM9N12/CN11-EK User Guide
11186A–ATARM–29-Nov-12
Table 4-1
lists the main components associated with these clock systems.
4.3.3
Reset and Wake-up Circuitry
The reset sources for the EK board are:
Power-on reset
Push-button reset (PB2)
JTAG reset from an in-circuit emulator (JTAG interface is equipped on EK board)
To disable any bootable content in NAND Flash or DataFlash, please refer to
4.3.4
Power Supplies
The SAM9N12/CN11-EK board evaluation and development platform embeds all the necessary power
rails required for the SAM9N12/CN11 processor and peripherals. The SAM9N12/CN11-EK board can be
supplied by either a USB connection via J3 or a 5V DC block through input J1 (refer to usb schematic).
rails required for the SAM9N12/CN11 processor and peripherals. The SAM9N12/CN11-EK board can be
supplied by either a USB connection via J3 or a 5V DC block through input J1 (refer to usb schematic).
A manual power supply selection (SW1) between the USB supply and the 5V power supply is provided
to select the main power line.
to select the main power line.
Figure 4-5.
Power Input
Table 4-1. Main Components Associated with the Clock Systems
QTY
Description
Component assignment
1
Crystal for Internal Clock, 16 MHz
Y1
1
Crystal for RTC Clock, 32.768 kHz
Y2
1
Crystal for Ethernet Clock, 25 MHz
Y3