CoreWind Technology SBC-SAM9G20, Руководство пользователя

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13 VDD5v VDD5v
14 VREFP VREFP
15 AVDD AVDD
16 AGND AGND
17 PC0
AD0 ADC interface
18 PC1
AD1 ADC interface
19 PC2
AD2 ADC interface
20 PC3
AD3 ADC interface
3.15 Watchdog
The SBC-SAM9G20 uses the AT91SAM9G20 on-chip Watchdog, it will output reset
signal if it can not generate external clock
， so it can be used to reset system when
system hang.
3.16 RTC
The SBC-SAM9G20 uses the external RTC chips DS3231SN with battery hook-up
to provide accurate time keeping.
3.17 jumper
Jumper Function Description
J8
(Defualt: close)
Nand CS
open – Nand Chips not select
close – Nand Chips select
J20 NC NC
J6
J24 120R resistor for
3.18 Buzzer and LED
The SBC-SAM9G20 have a buzzer and 2 LED in the board.
The Buzzer can be controlled by PB19.
Item Function
PB19 Control
Out =0 Buzz
Out =1 No Buzz
The Led control method:
Item Function
D3
PC12 Out = 1 No light
PC12 Out = 0 Light
SBC-SAM9G20 User manual
www.armdevs.com