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15
ATSAM4C-EK [USER GUIDE]
11251A–ATARM–16-Dec-13
3.5.3
Serial Port UART1 RS232
The UART1 is buffered with an Analog Devices ADM3312E RS-232 transceiver and is connected to the HE10 PIO port
C. A classic implementation RS232 transceiver selection should include double source capability.
Features:
One RS232 transceiver connected to RXD (PC1) and TXD (PC0) only
One HE10 male connector (PIO port C)
Required resistors and capacitors
Figure 3-12.
Serial Port Schematic
3.6
Debug Interfaces
3.6.1
JTAG/ICE
The ATSAM4C-EK includes a JTAG interface port to provide debug level access to the system-on-chip. The JTAG port is
a 20-pin, dual-row, 0.1-inch male connector. This port provides the required interface for in-circuit emulators such as the
ARM Multi-ICE
®
and Atmel SAM-ICE
.
Features:
One HE10 20-pin male connector
Required resistors
Figure 3-13.
JTAG/ICE Interface Schematic
(RXD1)
(TXD1)
UART1
(RS232_RXD)
(RS232_TXD)
PC1
PC0
VDDMAIN
VDDMAIN
VDDMAIN
J5
HE10
1
2
3
R48
0R
R50
0R
R47
0R
R51
47K
C61
100nF
R43
MN5
ADM3312EARU
MN5
C1+
6
C1-
20
C2+
2
C2-
4
C3+
24
C3-
22
VCC
3
V+
1
V-
21
GND
23
SD
19
EN
5
T1IN
7
T1OUT
18
R1IN
15
R1OUT
10
T2IN
8
T2OUT
17
R2IN
14
R2OUT
11
T3IN
9
T3OUT
16
R3IN
13
R3OUT
12
R44
0R
C60
100nF
R49
47K
C59
100nF
C57
100nF
C58
100nF
C55
4.7µF
R52
0R
C56
100nF
Do Not Populate
47K/DNP
Do Not Populate
R146 0R/DNP
(NRST)
(TMS)
(TCK)
(TDO)
JTAG/ICE INTERFACE
(TDI)
100K
Ω
TMP2
PB0
PB2
NRST
PB3
PB1
PB27
VDDIN
PB1
{3,4}
R138
R137
R136
J11
1
2
3
4
5
6
7
8
9
10
11
12
13
15
17
19
14
16
18
20
BP6
1
4
2
3
R134
R149
100K
Ω
R148
33
Ω
JP24
JP24
1
2
3
R135
100K
Ω
100K
Ω
100K
Ω
100K
Ω
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