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SAMA5D2-PTC-EK Datasheet(PDF) 14 Page - Microchip Technology

Part # SAMA5D2-PTC-EK
Description  SAMA5D2-PTC-EK Users Guide
PDF  66 Pages
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Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

SAMA5D2-PTC-EK Datasheet(HTML) 14 Page - Microchip Technology

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Figure 3-10. Shutdown Controller
STARTB
EN_1
VDD_MAIN_5V
GND_POWER
GND_POWER
VDD_3V3
GND_POWER
SHDN
R3
100K
R0402
Q1
BSS138
SOT23_123
1
3
2
R4
10K
R0402
Q2
BSS138
SOT23_123
1
3
2
C8
100nF
C0402
3.2.5
Push Button Switches
The SAMA5D2-PTC-EK features four push buttons:
•
One board reset push button (BP3). When pressed and released, it causes a power-on reset of the
board.
•
One wakeup push button (BP4) connected to the SAMA5D2 WKUP pin, used to exit the processor
from low-power mode.
•
One disable boot push button (BP2) used to devalidate the boot memories (refer to CS Disable).
Figure 3-11. System Push Buttons
WAKE UP
RESET
DIS BOOT
GND_POWER
VDDBU
DISABLE_BOOT
NRST
WKUP
R146
100R-1%
r0402
BP3
Tact Switch
FSM2JSML
R147
100R-1%
r0402
R238
10K
R0402
BP2
Tact Switch
FSM2JSML
R145
100R-1%
r0402
BP4
Tact Switch
FSM2JSML
•
One user push button (BP1) connected to PIO PB10.
Figure 3-12. User Push Button
USER BUTTON
PA10_USER_BT
R144
0R
R0402
BP1
Tact Switch
FSM2JSML
GND_POWER
3.2.6
Clock Circuitry
The embedded microcontroller generates its necessary clocks based on two crystal oscillators: one slow
clock (SLCK) oscillator running at 32.768 KHz and one main clock oscillator running at 24 MHz.
The SAMA5D2-PTC-EK board includes four clock sources:
•
The two clocks mentioned above are alternatives for the SAMA5D2 processor (24 MHz, 32.768
kHz)
•
One crystal oscillator for the Ethernet RMII chip (25 MHz)
•
One crystal oscillator for the JLink-OB microcontroller (12 MHz)
SAMA5D2-PTC-EK
Board Components
© 2017 Microchip Technology Inc.
DS50002709A-page 14



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