ATSAM3X-EK Atmel, ATSAM3X-EK Datasheet - Page 15

• Manufacturer Part Number: ATSAM3X-EK
• Description: Development Boards & Kits - ARM EVAL KIT SAM3X & SAM3A series
• Manufacturer: Atmel

Specifications of ATSAM3X-EK

• Rohs: yes
• Product: Evaluation Kits
• Tool Is For Evaluation Of: SAM3X
• Core: ARM Cortex M3
• Interface Type: Serial
• Operating Supply Voltage: 3.3 V
• Factory Pack Quantity: 1

4.3.7.1
Figure 4-9.
4.3.7.2
Figure 4-10. RS485
4.3.8
SAM3X-EK User Guide
RS232
RS485
LEDs
RS232
There are 4 USARTs on the SAM3X8H device.
SAM3X-EK connects the USART0 bus (including TXD, RXD, RTS, CTS handshake signals control) to
the DB9 male connector J13 through the RS232 Transceiver MN16.
As noticed above, the USART0 is shared with the RS485 port, connected to the transceiver MN15, con-
nected to the 3-point connector J12. The design includes selectable jumpers for RS485 bus termination
resistors selection (JP14, JP15 and JP16).
There are four LEDs on the SAM3X-EK board:
[3]
[3]
[3]
[3]
[3]
D2 blue, D3 amber and D4 green LEDs are user defined and controlled by the GPIO.
D5 red LED is a power LED indicating that the 3.3V rail is enabled. It can also be controlled by the
GPIO (by default, the GPIO is disabled and an on-board pull-up to 3.3V lights the LED).
PE14
PA11
PA10
PB25
PB26
[3]
[3]
[3]
[3]
PA10
PB26
PB25
PA11
(COM0_EN)
(TXD0)
(RXD0)
(RTS0)
(CTS0)
R119
R119
R120
R120
R121
R121
R122
R122
R123
R123
(RXD0)
(CTS0)
(RTS0)
(TXD0)
0R
0R
0R
0R
0R
0R
0R
0R
0R
0R
R109
R109
R110
R110
R113
R113
R114
R114
+3V3
C125
C125
4.7uF
4.7uF
+3V3
R106
R106
47K
47K
0R
0R
0R
0R
0R
0R
0R
0R
RR7
RR7
47KX4
47KX4
+3V3
C126
C126
100nF
100nF
R115
R115
47K
47K
R107
R107
47K
47K
C127
C127
100nF
100nF
C130
C130
100nF
100nF
1
2
3
4
MN15
MN15
ADM3485ARZ
ADM3485ARZ
RS 485
21
23
19
10
11
12
RO
RE
DE
DI
3
1
5
7
8
9
MN16
MN16
ADM3312EARU
ADM3312EARU
RS232 COM
VCC
V+
V-
GND
SD
EN
T1IN
R1OUT
T2IN
R2OUT
T3IN
R3OUT
GND
VCC
A
B
8
5
6
7
T1OUT
T2OUT
T3OUT
R1IN
R2IN
R3IN
C1+
C2+
C3+
C1-
C2-
C3-
+3V3
6
20
2
4
24
22
18
15
17
14
16
13
R117
R117
120R
120R
C122
C122
100nF
100nF
R124
R124
JP15
JP15
C128
C128
100nF
100nF
C129
C129
100nF
100nF
C131
C131
100nF
100nF
+3V3
0R
0R
R108
R108
DNP
DNP
R118
R118
DNP
DNP
JP14
JP14
JP16
JP16
1
2
3
J12
J12
1
6
2
7
3
8
4
9
5
J13
J13
11156A–ATARM–25-May-12
4-7