Atmel SMART SAM4C Series User Manual page 15

3.6 Debug Interfaces
3.6.1 JTAG/ICE
The SAM4C32-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
Features:
One HE10 20-pin male connector

Required resistors

Figure 3-13. JTAG/ICE Interface Schematic
3.6.2 UART/USB Bridge Interface
The UART is connected to an interface USB through an FTDI FT232R (TTL to USB converter) device. RX and TX
DBGU only are connected to the Micro AB USB connector.
Figure 3-14. DBGU/USB Bridge Schematic
FGND
15 SAM4C32-EK [USER GUIDE]
Atmel-11253A-ATARM-SAM4C32-EK-UserGuide_17-Sep-14
®
and Atmel SAM-ICE.
VDDIN
R134
J11
100K Ω
2 1
4 3
6 5
8 7
10 9
12 11
14 13
16 15
18 17
20 19
JTAG/ICE INTERFACE
{3,4} PB1
TMP2
L3
220Ω at 100MHz
J6
1 2
USB Micro AB
C66
10nF
1
R58 0R
2
3
R59
4
C70 C71
47pF 47pF
5
R63 0R
DBGU/USB Bridge
R135 R136 R137 R138
100K Ω 100K Ω 100K Ω 100K Ω
R146 0R/DNP
Do Not Populate
(TDO)
JP24 JP24
PB1 2
BP6
1 3
2 4
USB5V
3V3OUT
C68 C68
C64 C67
100nF
4.7µF/16V
100nF U8
4
VCCIO
20
VCC
16
USBDM
15
USBDP
0R
8
Do Not Populate
NC1
19
5V RESET#
24
R60 4.7K/DNP
NC2
27
OSCI
28
OSCO
3V3OUT
17
3V3OUT
25
C72
AGND
100nF 7
GND1
18
GND2
21
GND3
FT232RL FT232RL
PB0 (TDI)
PB2
(TMS)
PB3
(TCK)
NRST
(NRST)
R149
100K Ω
R148 33Ω PB27
R56 0R
1
PB4
(RXD0)
TXD
5
PB5
(TXD0)
RXD
R57 0R
3
RTS#
11
CTS#
2
DTR#
9
DSR#
10
DCD#
6
RI#
23
D7 Red
CBUS0
R61 470R 6
Green
22 D6
CBUS1
13
R62 470R
CBUS2
14
CBUS3
12
R64 10K/DNP
CBUS4
Do Not Populate
26
TEST
R65 0R
3V3OUT