Atmel SAM4E-EK User manual

SAM4E-EK User Guide
SAM4E-EK Evaluation Kit
42067B
−
SAM4E
−
04/2013

SAM4E-EK User Guide
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2
Table of Contents
1.Introduction ..........................................................................................3
1.1Scope …............................................................................................................ 3
1.2User guide......................................................................................................... 3
1.3References and applicable documents ............................................................. 3
2.Kit Contents .........................................................................................4
2.1Deliverables ...................................................................................................... 4
2.2Electrostatic warning ......................................................................................... 5
3.Power Up .............................................................................................6
3.1Power up the board........................................................................................... 6
3.2Source code and technical support ................................................................... 6
4.Board Description ................................................................................7
4.1Board overview ................................................................................................. 7
4.2Features list ...................................................................................................... 8
4.3Function blocks ................................................................................................. 9
4.3.1Processor............................................................................................ 9
4.3.2Memory ….......................................................................................... 9
4.3.3Clock circuitry ................................................................................... 10
4.3.4Reset circuitry ................................................................................... 10
4.3.5Power supply and management ....................................................... 11
4.3.6UART ….. ......................................................................................... 12
4.3.7USART ….......................................................................................... 12
4.3.8RS485 …… ...................................................................................... 13
4.3.9Ethernet MAC 10/100 (EMAC).......................................................... 13
4.3.10CAN …….......................................................................................... 14
4.3.11Display interface ............................................................................... 14
4.3.11.1LCD module .................................................................... 14
4.3.11.2Backlight control.............................................................. 15
4.3.12Touch screen interface ..................................................................... 16
4.3.13JTAG/ICE.......................................................................................... 16
4.3.14Audio Interface.................................................................................. 17
4.3.15USB device ....................................................................................... 17
4.3.16Analog interface................................................................................ 18
4.3.16.1Analog reference............................................................. 18
4.3.16.2Analog input .................................................................... 18
4.3.16.3Analog output.................................................................. 19
4.3.17QTouch elements ............................................................................. 20
4.3.18LEDs…….......................................................................................... 20
4.3.19SD/MMC card ................................................................................... 21
4.3.20ZigBee ……. ..................................................................................... 21
4.3.21PIO expansion .................................................................................. 21
5.Configuration......................................................................................23
5.1PIO usage ....................................................................................................... 23
5.2Jumpers .......................................................................................................... 26
6.Schematics ........................................................................................27
7.Revision History
.................................................................................36

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1. Introduction
1.1 Scope
This user guide introduces the SAM4E-EK Evaluation Kit (SAM4E-EK) and describes its development and debugging
capabilities.
Figure 1-1. Atmel SAM4E-EK board.
1.2 User guide
This guide gives details on how the Atmel®SAM4E-EK has been designed. It is made up of six chapters:
•Chapter 1 includes references, applicable documents, acronyms and abbreviations
•Chapter 2 describes the kit contents, its main features
•Chapter 3 provides instructions to power up the SAM4E-EK and describes how to use it
•Chapter 4 describes the hardware resources including default jumper and switch settings and the schematics
•Chapter 5 provides all the board schematics
•Chapter 6 provides troubleshooting instructions
1.3 References and applicable documents
Table 1-1. References and applicable documents.
Reference Title Comment
Lit. no.: 11157 SAM4E datasheet www.atmel.com

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2. Kit Contents
2.1 Deliverables
The Atmel SAM4E-EK toolkit contains the following items:
•An Atmel SAM4E-EK board
•Power supply
•Universal input AC/DC power supply with US, Europe and UK plug adapters
•One USB cable
•One serial RS232 cable
•One Ethernet cross cable
•A welcome letter
Figure 2-1. Unpacked SAM4E-EK.
Unpack and inspect the kit carefully. Contact your local Atmel distributor if you have issues concerning the contents of
the kit.

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2.2 Electrostatic warning
The Atmel SAM4E-EK board is shipped in a protective anti-static bag. The board must not be subjected to high
electrostatic potentials. A grounding strap or similar protective device should be worn when handling the board. Avoid
touching the components or any other metallic element of the board.

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3. Power Up
3.1 Power up the board
Unpack the board taking care to avoid electrostatic discharge. Unpack the power supply, select the right power plug
adapter corresponding to that of your country, and insert it into the power supply.
Connect the power supply DC connector to the board and plug the power supply to an AC power socket.
The board LCD should light up and display a welcome page. Then click or touch the icons displayed on the screen and
enjoy the demo.
3.2 Source code and technical support
After boot up, you can run some sample code or your own application on the development kit. You can download
sample code and get technical support from the Atmel web site: http://www.atmel.com.

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4. Board Description
4.1 Board overview
This chapter introduces the Atmel SAM4E-EK Evaluation Kit design. It introduces system-level concepts, such as power
distribution, memory, and interface assignments.
The SAM4E-EK board is based on the integration of an ARM®Cortex™-M4 processor with on-board NAND Flash and a
set of popular peripherals. It is designed to provide a high performance processor evaluation solution with high flexibility
for various kinds of applications.
Figure 4-1. SAM4E-EK block diagram.

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4.2 Features list
The list of the main board components and interfaces:
•SAM4E16 chip BGA144 package with optional socket footprint
•12MHz crystal
•32.768kHz crystal
•Optional SMB connector for external system clock input
•NAND Flash
•2.8 inch TFT color LCD display with touch panel and backlight
•UART port with RS232 driver
•USART port with RS232 driver multiplexed with RS485 function with driver
•CAN port with driver
•Mono/stereo headphone jack output
•One Ethernet physical transceiver layer with RJ45 connector
•SD/MMC interface
•Reset button: NRST
•User buttons: WAKU, TAMP, Scroll-up, Scroll-down
•QTouch®buttons: Left, Right and Slider
•Full Speed USB device port
•JTAG/ICE port
•On-board power regulation
•Three user LEDs
•Power LED
•BNC connector for ADC input
•BNC connector for DAC output
•User potentiometer connected to the ADC input
•ZigBee®connector
•PIO connection interfaces (PIOA, PIOC and PIOD with 32-bit, PIOB with 16-bit, PIOE with 6-bit)

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4.3 Function blocks
4.3.1 Processor
The Atmel SAM4E-EK is equipped with a SAM4E16 device in BGA144 package.
4.3.2 Memory
The SAM4E16 chip embeds:
•1024kB of embedded Flash
•128kB of embedded SRAM
•16kB of ROM with embedded boot loader routines (UART, USB) and In-Application Programming functions
(IAP) routines
The SAM4E16 features an External Bus Interface (EBI) that permits interfacing to a broad range of external memories
and virtually to any parallel peripheral.
The SAM4E-EK board is equipped with one NAND Flash MT29F2G08ABAEA on the EBI. This can change to other type
of flash by setting the Static Memory Controller.
Figure 4-2. NAND-Flash.
R132 47K
R131 0R
C92
100nF
MN10
WE
18
N.C6
6
VCC 37
CE
9
RE
8
N.C11
20
WP
19
N.C5
5
N.C1
1
N.C2
2
N.C3
3
N.C4
4
N.C12
21
N.C13
22
N.C14
23
N.C15
24
R/B
7
N.C17
26
N.C18 27
N.C19 28
I/O0 29
N.C21 34
N.C22 35
VSS 36
PRE 38
N.C23 39
VCC 12
VSS 13
ALE
17
N.C8
11 N.C7
10
N.C9
14
N.C10
15
CLE
16
N.C16
25
N.C20 33
I/O1 30
I/O3 32
I/O2 31
N.C27 47
N.C26 46
N.C25 45
I/O7 44
I/O6 43
I/O5 42
I/O4 41
N.C24 40
N.C28 48
R125
47K
MT29F2G08ABAEA
R126
47K
C93
100nF
C94
1uF
R133
DNP
+3V3
+3V3 +3V3
NAND FLASH
+3V3
PC18
PC7
PC14
PC4
PC5
PC6
PC1
PC2
PC3
PC0
PC9
PC10
PC16
PC17
J37-2
NCS0 chip select signal is used for NAND Flash chip selection. Furthermore, a dedicated jumper can disconnect it from
the on-board memories, thereby letting NCS0 free for other custom purposes.

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4.3.3 Clock circuitry
The clock generator of a SAM4E16 microcontroller is composed of:
•A low-power 32.768Hz Slow Clock Oscillator with bypass mode
•A 3 to 20MHz Crystal Oscillator, which can be bypassed (12MHz needed in case of USB)
•A factory programmed fast internal RC Oscillator. Three output frequencies can be selected: 4 (default value),
8 or 12MHz
•A 80 to 240MHz PLL (PLLB) providing a clock for the USB Full Speed Controller
•An 80 to 240MHz programmable PLL (PLLA), capable to provide the clock MCK to the processor and to the
peripherals. The input frequency of PLLA is from 3 to 32MHz
The SAM4E-EK board is equipped with one 12MHz crystal, optional Piezoelectric Ceramic Resonator 12MHz (Murata
ref. CSTCE12M0G15L99-R0), one 32.768Hz crystal and an external clock input connector.
Figure 4-3. External clock source.
C22 18pF
C31 15pF
J2
SMB
1
2 3
54
R5 DNP
R6
49.9R 1%
R11 0R
Y2
12
3
C27 18pF
R7 DNP
PA7
PA8
R12 DNP
PB9
PB8
R3 0R
Y1 32.768 kHz
Y3
12MHz
1 23
4
R8 0R
R4 0R
C28 15pF
4.3.4 Reset circuitry
On-board NRST button BP1 provides an external reset control of the SAM4E16.
The NRST pin is bidirectional. It is handled by the on-chip reset controller. It can be driven low to provide a reset signal
out to the external components. Conversely, it can be asserted low from the outside to reset the microcontroller Core
and the peripherals. The NRST pin integrates a permanent pull-up resistor of 100kto VDDIO.
On the SAM4E-EK board, the NRST signal is connected to the LCD module and JTAG port.
Note: At power-on, the NRST signal is asserted with default duration of two clock cycles. That duration may not be
sufficient to correctly reset any other system or board devices connected to that signal. First, in your custom
application, you need to check for these device’s datasheets about reset duration requirements. Then, you need to
set an appropriate configuration in the NRST Manager. This is done through the ERSTL field in the RSTC_MR
register. The NRST duration is thereby configurable between 60s and 2s, whether it is subsequently activated by
a software reset or a user reset. Refer to the SAM4E16 datasheet for in-depth information.

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4.3.5 Power supply and management
The Atmel SAM4E-EK board is supplied with an external 5V DC block through input J1. It is protected by a PolyZen
diode (MN2) and an LC combinatory filter (MN3). The PolyZen is used in the event of an incorrect power supply
connection.
The adjustable LDO regulator MN4 is used for the 3.3V rail main supply. It powers all the 3.3V components on the
board.
Figure 4-4. Power block.
+3V3
+
C29
100uF-TAN-6.3V
R9
169K 1%
+5V
MN4
MIC29302
VIN
2VOUT 4
SD
1
GND1
3
ADJ 5
GND2
6
R10
102K 1%
C30
100nF
+
C24
22uF
J1
Power Jack 2.1mm
1
2
3
+
C25
22uF
MN2
ZEN056V130A24LS
1
2
3
MN3
BNX002-01
SV
1
SG
2
CV 3
CG1 4
CG2 5
CG3 6
+5V
C23
100nF
+
C26
220uF-ELE-16V
The SAM4E16 product has different types of power supply pins:
•VDDIN pin:
Power for the internal voltage regulator, ADC, DAC, and analog comparator power supplies.
The voltage ranges from 1.6V to 3.6V.
•VDDIO pins:
Power for the Peripherals I/O lines.
The voltage ranges from 1.62V to 3.6V.
•VDDOUT pin:
Output of the internal voltage regulator.
•VDDCORE pins:
Power for the core, including the processor, embedded memories, and peripherals.
The voltage ranges from 1.08V to 1.32V.
•VDDPLL pin:
Power for the PLL A, PLL B and 12MHz oscillator.
The voltage ranges from 1.08V to 1.32V.
Note: VDDPLL should be decoupled and filtered from VDDCORE.

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4.3.6 UART
The Universal Asynchronous Receiver Transmitter features a two-pin UART that can be used for communication and
trace purposes. It offers an ideal channel for in-situ programming solutions. This UART is associated with two PDC
channels to reduce the processor time on packet handling.
This two-pin UART (TXD and RXD only) is buffered through an RS232 Transceiver MN6 and brought to the DB9 male
connector J7.
Figure 4-5. UART.
R58
100K
C54
100nF
R62 0R
TP4
MN 7
ADM3202
T1IN
11
T2IN
10 R1OUT
12
R2OUT
9
T1OU T 14
T2OU T 7
R1IN 13
R2IN 8
V+
2
C1+ 1
C1- 3
C2+ 4
C2- 5
V-
6
VCC
16
GND
15
J7
5
4
3
2
1
9
8
7
6
10 11
C53
100nF
C57
100nF
TP5
R60 0R
C55
100nF
R59
100K
C56
100nF
+3V3
+3V3
FGND
+3V3
PA9
PA10
UTXD0
URXD0
DBGU
4.3.7 USART
The Universal Synchronous/Asynchronous Receiver Transmitter (USART) provides one full duplex universal
synchronous/asynchronous serial link. The data frame format is extensively configurable (data length, parity, number of
stop bits) to support a broad range of serial communication standards. The USART is also associated with PDC
channels for TX/RX data access.
To avoid any electrical conflict, the RS232 and RS485 transceiver are isolated from the receiving line PA21.
•Chose RS485 channel: Close 1-2 pins on JP11 and set PA23 to high level
•Chose RS232 channel: Close 2-3 pins on JP11 and set PA23 to low level
Figure 4-6. USART.
RXD1
PA21
PA21_232
C46
100nF
C44
100nF
R37 0R
C48
100nF
R40 0R
R42 0R
J5
5
4
3
2
1
9
8
7
6
10 11
R44 0R
MN5
ADM3312EARU
C1+ 6
C1- 20
C2+ 2
C2- 4
C3+ 24
C3- 22
VCC
3
V+
1
V-
21
GND
23
SD
19
EN
5
T1I N
7T1OU T 18
R1IN 15 R1OUT
10
T2I N
8T2OU T 17
R2IN 14 R2OUT
11
T3I N
9T3OU T 16
R3IN 13 R3OUT
12
C49
100nF
R39 0R
R41 0R
C45
100nF
R38
47K
C43
4.7uF
TXD1
R43 47K
C47
100nF
PA21_485 FGND
+3V3
+3V3
+3V3
PA25
PA24
RTS1
PA21_232
CTS1
PA22
USART1
PA23
JP11
1
2
3

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4.3.8 RS485
As noticed above the USART1 is shared with the RS485 port, connected to the transceiver MN6 and output to the 3-
point connector J6. The design includes selectable jumpers for RS485 bus termination resistors selection (JP10, JP12,
and JP13).
Figure 4-7. RS485.
PA25
JP13
R52
DNP
PA21_485
JP10
R50 0R
R48 0R
R51
120R
J6
1
2
3
R47 0R
R45
DNP
R46
10K
C52
100nF
R49 0R
MN6
ADM3485ARZ
RO
1
RE
2
DE
3
DI
4
VCC 8
GND 5
A6
B7
+3V3
+3V3
+3V3
FGND
JP12
TXD1
RXD1
CTS1
RTS1
PA22
RS 485
PA24
4.3.9 Ethernet MAC 10/100 (EMAC)
The EMAC module implements a 10/100 Ethernet MAC compatible with the IEEE®802.3 standard using an address
checker, statistics and control registers, receive and transmit blocks, and a DMA interface.
The Atmel SAM4E-EK is equipped with a MICREL KSZ8051MNL 10/100 Mbps Fast Ethernet Physical Layer
transceiver. It contains the entire physical layer functions of 100BASE-TX as defined by IEEE 802.3u.
The Ethernet interface provides MII for 100Base-TX or 10Base-TX. The MII interfaces are capable of both 10Mb/s and
100Mb/s data rates as described in the IEEE 802.3u standard. The Ethernet interface integrates an RJ45 connector
with an embedded transformer, and two status LEDs.
Figure 4-8. Ethernet block.
FGND
ETH1_XI
ETH1_XO
Y4
25MHz
1 23
4
C79 100nF
R108
4.7K
R107
4.7K
+3V3
+3V3
R111 0R
C86 22pF
R109
470R
R1120R
C76
100nF
R110
470R
GND_ETH
RXDV
RJ45 ETHERNET CONNECTOR
C77 2.2uF
At the De-Assertion of Reset:
PHY ADD[2:0]:001
CONFIG[2:0]:000,Mode:MII
Duplex Mode :Half Duple x
Isolate Mode :Disable
Speed Mode:100Mbps
Nw ay Auto -Ne gotiat ion:Enab le
ETH PHY
C82
100nF
C85 22pF
GND_ETH
R85 22R
R104 22R
GND_ETH
R105 22R
R86 22R
R87 22R
R88 22R
R89 22R
R90 22R
R91 22R
R92 22R
R93 22R
R94 22R
R96 22R
R98 22R
COL
E1_RXCK
RXER
E1_CRS
TXD3
R84 22R
C78
100nF
TXD2
1
2
3
6
4
5
7
8
75
75
7575
1nF
TD+
TD-
CT
NC
RD-
CT
TX+
TX-
RX+
RX-
RD+
J20
J00-0061
1
2
7
8
3
6
5
4
13 14
9
10
11
12
RXC
TXD0
TXD1
E1_COL
PD3
PD14
PD7
PD2
RXD0
PD12 RXD3
PD[0..31]
PD11
FGND
ETH1_XO
R99 22R RXM
RXP
TXP
+3V3
TXM
CT_TX
CT_RX
L5
220ohm at 100MHz
1 2
RXD2
NRST
C81
10uF
C83
10uF
+3V3
TXC
ETH1_XI
R100 22R
MN9
KSZ8051MNL
RXC/B-CAST_OFF
19
CRS/CONFIG1
29
COL/CONFIG0
28
TXD1
25
TXD0
24
TXEN
23
RXD3/PHYAD0
13
RXD2/PHYAD1
14
RXD1/PHYAD2
15
RXD0/DUPLEX
16
RXDV/CONFIG2
18 RXER/ISO
20
MDC
12
MDIO
11
INTRP/NAND
21
VDDA_3V3
3
VDDIO
17
RESET
32
TXP 7
TXM 6
RXP 5
RXM 4
VDD_1V2 2
GND 1
PADDLE 33
TXC
22
TXD2
26 TXD3
27
REXT 10
XO 8
XI 9
LED0/ NW AY EN 30
LED1/ SPEED 31
RR4
4.7k
1 2 3 4 5
6 7 8
PD16
PD4
PD15
E1_TXC K
TXENPD1
PD28
PD9
PD5
PD6
PD8
E1_RXDV
PD0
E1_TX0
E1_RX1
E1_RX0
E1_MDC
E1_MDIO
E1_TXEN
INT_ETH1
E1_RXER
+3V3
RR3
4.7k
1 2 3 4 5
6 7 8
E1_TX1
C84
100nF
E1_TX2
FGND
PD10
E1_TX3
E1_RX2
E1_RX3
PD13
RXD1
CRS
R103 22R
E1_AVDDT R106 6.49K
R102 4.7K
R101 4.7K

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4.3.10 CAN
The CAN controller provides all the features required to implement the serial communication protocol CAN defined by
Robert Bosch GmbH, the CAN specification as referred to by ISO/11898A (2.0 Part A and 2.0 Part B) for high speeds
and ISO/11519-2 for low speeds. The CAN Controller is able to handle all types of frames (Data, Remote, Error and
Overload) and achieves a bit rate of 1Mbit/sec.
The Atmel SAM4E has two CAN Controller with eight Mailboxes.
SAM4E-EK connects the CAN0 and CAN1 bus to the CAN transceiver SN65HVD234 (MN11 and MN12).
The extension connector (J13 and J14) type is RJ12 female socket.
Figure 4-9. CAN block.
R140
10K
(CANRX0)
R134
10K
C96
100nF
(CANTX0RS)
PE0
J13
CAN RJ12
1
1
2
2
3
3
4
4
5
5
6
6
+
C95
10uF
R135 0R
PE1
PB3
+
3V3
R138 0R(CANRX0EN)
R139 0R
+3V3
Rs
D
EN
R
CANH
CANL
VCCGND
MN11
SN65HVD234
2 3
7
6
4
1
5
8
(CANTX0)
R137
120R
JP28
R151
10K
(CANRX1)
R141
10K
C99
100nF
(CANTX1RS)
PE2
PC15
J14
CAN RJ12
1
1
2
2
3
3
4
4
5
5
6
6
+
C98
10uF
R142 0R
PE3
PC12
R143 0R
R149 0R
+3V3
(CANRX1EN)
R150 0R
+3V3
Rs
D
EN
R
CANH
CANL
VCCGND
MN12
SN65HVD234
2 3
7
6
4
1
5
8
(CANTX1)
CAN1
R148
120R
JP29
CAN0
PB2 J37-6
4.3.11 Display interface
The SAM4E-EK carries a TFT transmissive LCD module with touch panel, FTM280C34D. Its integrated driver IC is
ILI9325. The LCD display area is 2.8 inches diagonally measured, with a native resolution of 240 x 320 dots.
4.3.11.1 LCD module
The LCD module gets reset from the NRST signal. As explained, this NRST is shared with the JTAG port and the push-
button BP1. The LCD chip select signal is connected to NCS1; the jumper JP8 can disconnect it so that this PIO line is
available for other custom usage.
The SAM4E16 communicates with the LCD through PIOC where an 8-bit parallel “8080-like” protocol data bus has to
be implemented in software.

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Figure 4-10. LCD block.
LCD_DB3
Six slots on PCB for LCD shield
PC11
R14
DNP
D1
DNP
TVS, SOT23-5
1
2
3 4 5
R18 0R
C34
100nF
R15
DNP
RR2
DNP
1
2
3
45
6
7
8
LED_A
J3
FH26-39S-0.3SHW
VDD
1
DB17
2
DB16
3
DB15
4
DB14
5
DB13
6
DB12
7
DB11
8
DB10
9
DB9
10
DB8
11
DB7
12
DB6
13
DB5
14
DB4
15
DB3
16
DB2
17
DB1
18
DB0
19
VDD
20
RD
21
WR
22
RS
23
CS
24
RESET
25
IM0
26
IM1
27
GND
28
LED-A
29
LEDK1
30
LEDK2
31
LEDK3
32
LEDK4
33
Y+
34
Y-
35
X+
36
X-
37
NC
38
GND
39
R13
47K
R17
4.7K
C32
10uF
R16
10K
C33
100nF
PINs
on
BOT
PIN 39
PIN 1
Z7
FTM280C34D
RR1
DNP
1
2
3
45
6
7
8
+3V3
+
3V3
PC[0..31]
NRST
PA[0..31]
LCD_DB2
JP8
PC8
LCD_DB0
PD[0..31]
LCD
LCD_DB4
PD18
4.7k
NOT POPULATED
The part is placed as
close as possible to J4
LCD_DB9
LCD_DB13
LCD_DB12
LCD_DB11
LCD_DB10
LCD_DB16
LCD_DB15
LCD_DB14
LCD_DB17
LCD_DB5
PC2
PC1
PC0
PC3
X_L EF T
LCD_DB9
4.7k
PC6
PC5
PC4
PC7
X_R I G H T
LCD_DB7
Y_DOWN
LCD_DB8
Y_UP
4.7k
LCD_DB6
4.7k
LCD_DB6
LCD_DB7
LED_K4
LCD_DB8
LCD_DB4
LCD_DB5
LED_K3
LED_K2
LCD_DB2
LCD_DB3
LCD_DB1
LED_K1
NRST
LCD_DB0
LCD_DB1
PC19
4.3.11.2 Backlight control
The LCD backlight is made of four integrated white chip-LEDs arranged in parallel. These are driven by an AAT3155
charge pump, MN15. The AAT3155 is controlled by PC13; the 0resistor R24 is mounted in series on this line, which
permits to use it for other custom purposes. In that case, the pull-up resistor R20 maintains the charge pump
permanently enabled by default.
On the anode drive line, a 0resistor R18 is implemented in series for an optional current limitation.
Figure 4-11. Backlight control.
TP1
R24
0R
C35
1uF
R20
47K
C38
4.7uF
C36
1uF
MN 15
AAT3155ITP-T1
C1+
10
C1-
9
EN/SET
11
C2+ 7
C2- 6
OUTCP 8
IN
5
GND
4
D1 3
D2 2
D3 1
D4 12
C37
1uF
FB1 BN03K314S300R
+3V3
+3V3 LED_A
LED_K1
LED_K4
LED_K3
LED_K2
PC13
LCD BACKLIGHT

SAM4E-EK User Guide
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16
4.3.12 Touch screen interface
The LCD module integrates a 4-wire touch panel controlled by MN16 (ADS7843) which is a slave device on the
SAM4E16 SPI bus. The controller sends back the measurement information about the X and Y positions as a pressure
is applied to the touch panel. The touch panel can be used with either a stylus or a finger.
The ADS7843 touch panel controller connects to the SPI interface via the NPCS0 control signal. Two interrupt signals
are connected and provide events information back to the microcontroller: PenIrq and Busy.
Note: PenIrq (PA16) is shared with ZigBee signal ZIGB_MISC.
Busy (PA17) is shared with ZigBee signal ZIGB_IRQ.
Therefore, if using a ZigBee interface in concurrence with the Touch Screen controller, take care not to have both
drivers enabled at the same time on either PA16 or PA17.
Figure 4-12. Touch panel control.
R29
0R
R26
1R
C39
100nF
R22 0R
MN16
ADS7843E
XP
2
YP
3
XM
4
YM
5
DCLK 16
DIN 14
DOUT 12
CS 15
BUSY 13
PENIRQ 11
VREF 9
VCC1 1
VCC2 10
GND 6
IN3
7
IN4
8
R19
100K
R28
100K
L2 10uH-150mA
TP3
C40
100nF
TP2
R23 0R
C41
100nF
C42
4.7uF
R27
100K
R25 0R
R21
100K
+3V3
+3V3
+3V3
AGND_TP AGND_TP
LCD TOUCH SCREEN
PA14
PA13
PA12
PA11
PA17
X_R I G H T
Y_DOWN
X_L EF T
Y_UP
PA16
JP9
4.3.13 JTAG/ICE
A standard 20-pin JTAG/ICE connector is implemented on the Atmel SAM4E-EK for the connection of a compatible
ARM JTAG emulator interface, such as the SAM-ICE™ from Segger.
Note that the NRST signal is connected to BP1 system button and is also used to reset the LCD module. The 0
resistor R61 may be removed in order to isolate the JTAG port from this system reset signal.
Figure 4-13. JTAG interface.
R56
100K J8
HE10 20PTS
VTref
1Vsupply 2
nTRST
3GND1 4
TDI
5GND2 6
TMS
7GND3 8
TCK
9GND4 10
RTCK
11 GND5 12
TDO
13 GND6 14
nSRST
15 GND7 16
DBGRQ
17 GND8 18
DBGACK
19 GND9 20
R57
100K
R61 0R
R53
100K
R54
100K
R55
100K
+3V3
PB6
PB4
NRST
ICE INTERFACE
PB5
PB7

SAM4E-EK User Guide
42067B−SAM4E−04/2013
17
4.3.14 Audio Interface
The Atmel SAM4E-EK evaluation kit supports mono/stereo audio driven by a TPA0223 audio amplifier connected to two
DAC channels of the microcontroller.
The TPA0223 is a 2W mono Bridge-Tied-Load (BTL) amplifier designed to drive speakers with as low as 4
impedance. The amplifier can be reconfigured on the fly to drive two stereo Single-Ended (SE) signals into head
phones.
Figure 4-14. Headphone output.
JP17
JP15
PB14
JP18
1
2
3
AUDIO_OUTL
JP14
1
2
3
J9
1
2
DAC0
R67 33K
J10
Phonejack Stereo 3.5
5
4
3
2
1
+
C62 220uF-TAN-6.3V
+
C58 220uF-TAN-6.3V
R64 1K
R63 1K
R71 47K
C65 0.47uF
AGND
AGND
AUDIO OUT
PB13
C59
1uF
C61
100nF
TP6
Test Pad SQ-40TH
R72 33K
C63 0.47uF
C67 0.47uF
MN8
TPA0223DGQ
VDD
3
RIN
5
MON O-I N
1
LIN
9
LO/MO- 10
RO/MO+ 6
ST/MN 7
SHUTD0WN 2
BY PASS 4
GND 8
PAD
11
+
C60
10uF
C64 0.47uF
VDD_AMP
R70 100K
R68 100K R69 100K
AGND
AGND
AGND
AGND
VDD_AMP
C66
1uF
+5V
R65 33K
AGND
R66 47K
FB2
BN03K314S300R
+3V3
AGND
JP16
R73 0R
Using a readily available 1/8-in. (3.5mm) stereo headphone jack, the control switch (pin4 and pin5 in J10) is closed
when no plug is inserted. When closed, a 100k/1kdivider pulls the ST/MN input low. When a jack plug is inserted,
the 1kresistor is disconnected and the ST/MN input is pulled high. The mono speaker (J9 connector) is also
physically disconnected from the RO/MO+ output so that no sound is heard from the speaker while the headphones are
inserted.
When works as stereo mode make sure JP15, JP16, and JP17 are disconnected.
4.3.15 USB device
The SAM4E16 UDP port is compliant with the Universal Serial Bus (USB) rev 2.0 Full Speed device specification. J11 is
a micro B-type receptacle for USB device.
Both 27resistors R82 and R83 build up 90differential impedance together with the (embedded) 6output
impedance of the SAM4E16 full speed channel drivers.
R80 and R81 build up a divider bridge from VBUS +5V to implement plug-in detection (5V level gets lowered to a PIO
compatible 3.3V level) through PC21.

SAM4E-EK User Guide
42067B−SAM4E−04/2013
18
Figure 4-15. USB.
C75
10pF
R83 27R
RV1
V5.5MLA0603
PC21
FGND
PB10
RV2
V5.5MLA0603
USB
5V D- D+ ID G
J11
TBD USB Micro B
1 2 3 4
7
5
6
8
9
10 11
R81 68K
R80 47K
FGND
R82 27R
PB11
4.3.16 Analog interface
4.3.16.1 Analog reference
The 3.0V voltage reference is based on a LM4040 (Precision Micropower Shunt Voltage Reference).
This ADVREF level can be set as 3.0V or 3.3V via the jumper JP3.
Figure 4-16. Analog Vref.
R1
2.2K
+5V
MN 1
LM4040AIM3X-3.0
+3V3
C14
1uF
C13
100nF
ADVREF
JP3
1
2
3
4.3.16.2 Analog input
•The BNC connector CN2 is connected to the AEF0_AD4 or AFE1_AD0 (selected by JP40) as a single external
analog input
•The BNC connectors CN3, CN4 are connected to AFE0_AD10 and AFE0_AD11 as a differential external
analog input. A low pass filter is optional by close 1-2 pins of JP21, JP22, JP24, and JP25
•Each BNC input has an on-board 50resistor termination that can be applied by closing jumper JP20, JP23 or
JP26
•A 10kpotentiometer (VR1) is also connected to the AFE0_AD5 implement an easy access to ADC
programming and debugging (or implement an analog user control like display brightness, volume, etc.)

SAM4E-EK User Guide
42067B−SAM4E−04/2013
19
Figure 4-17. ADC/AFE input.
CN3
BNC
CN4
BNC
JP40
1
2
3
PB0
R76
49.9R
CN2
BNC
JP23
ADC / AFE
C68
10nF
PB1
Potentiometer
Clockwise 2-->3
VR1
10K VR
1 3
2
+3V3
JP22
1
2
3
C72
680pF
(AFE0_AD10)
(AFE0_AD11)
C73
680pF
L3 220uH
L4 220uH
R78
600R
R77
49.9R
JP21
1
2
3
JP24
1
2
3
JP25
1
2
3
PC31
PC30
C71
4.7nF DNP
C74
4.7nF DNP
C70
10nF
(AFE1_AD0, need open JP41)
(AFE0_AD5)
PB2
(AFE0_AD4)
JP20
JP26
R79
49.9R
4.3.16.3 Analog output
The BNC connector CN1 is connected to the DAC port PB14 and provides an external analog output. An on-board 50
resistor termination can be enabled by closing jumper JP21. A filter can be implemented on this output channel by
replacing R74 and C69 with appropriate resistor and capacitor values, depending on the application requirements.
Figure 4-18. DAC output.
JP19
R75
49.9R
PB14
C69 2.2uF
R74
0R
DAC1
CN1
BNC
JP18
1
2
3

SAM4E-EK User Guide
42067B−SAM4E−04/2013
20
4.3.17 QTouch elements
QTouch keys consist in a series of sensors formed by the association of a copper area and the capacitive effect of
human fingers approaching it.
Keys
The Atmel SAM4E-EK implements two individual capacitive touch keys (RIGHT, LEFT).
Slider
A group of channels forms a Slider. A Slider is composed of eight channels for a QTouch acquisition method. Such a
sensor is used to detect a linear finger displacement on a sensitive area. A typical implementation is volume control.
Figure 4-19. QT_Slider.
R122
2.2K
R123
2.2K
Qtouch
R114 1K
C89
100nF
C91 4.7nF
R115 1K
R116 1K
PE4
QKEY
K2
12
R118 1K
R119 1K
R120 1K
R121 1K
PA4
MN17
AT42QT2160
VDD
3
VDD
16
VDD
17
RST
25
SDA
23
SCL
24
CHANGE
7
I2C_A0
21
I2C_A1
22
VREF
8
VSS
4
VSS
18
X0 10
X1 11
X2 12
X3 13
X4 14
X5 15
X6 5
X7 6
GPIO2 1
GPIO3 2
GPIO1 28
Y1A 27
Y1B 20
Y0A 26
Y0B 19
SMP 9
PAD 29
QKEY
K1
12
+3V3
R128 1K
R127 1K
FB3
BN03K314S300R
R124
10K
Slider
S1
X6
X5
X4
X3
X2
X1
X0
Y0
+3V3
C88
1uF
C87
100nF
C90 4.7nF
R129
1M
R117 10K
R130
1M
PA3
4.3.18 LEDs
There are three LEDs on the SAM4E-EK board:
•A blue LED (D2), amber LED (D3) and a green LED (D4), which are user defined and controlled by the GPIO
•A red LED (D5), which is a power LED indicating that the 3.3V power rail is active. It is also controlled by the
GPIO and can be treated as a user LED as well. The only difference with the two others is that it is controlled
through a MOS transistor. By default, the PIO line is disabled; a pull-up resistor controls the MOS to light the
LED when the power is ON
Figure 4-20. LEDs.
PWM
PD20
+3V3
PD21 D4 LED Green
D5 LED Red
R157
470R
R158
470R
R160
470R
R159 100K
D3 LED Amber
Q1IRLML2502
1
32
LEDS
PD22
PWM
POWER
PA0
R154
470R D2 LED Blue
TIMER