Atmel SMART SAM4C Series User manual

SMART
Atmel-11253A-ATARM-SAM4C32-EK-UserGuide_17-Sep-14
Introduction
The SAM4C32 Evaluation Kit (SAM4C32-EK) enables evaluation capabilities and
code development of applications running on the 32-bit ARM®Cortex®-M4
SAM4C series microcontrollers from Atmel® Corporation.
The SAM4C32-EK can be used with the following microcontrollers:
SAM4C32C
SAM4C16C
SAM4C8C
This document describes the kit contents and architecture, and provides
guidelines on how to use the kit.
Atmel | SMART SAM4C Series
SAM4C32 Evaluation Kit
USER GUIDE

SAM4C32-EK [USER GUIDE]
Atmel-11253A-ATARM-SAM4C32-EK-UserGuide_17-Sep-14
2
Kit Contents
SAM4C32-EK Board
Power Supply
Universal input AC/DC power supply with US, Europe and UK plug adapters
3V Lithium Battery type CR1225
Cables
Serial RS232 cable
Micro A/B-type USB cable
Welcome letter
Reference documents
SAM4C Series Datasheet (Atmel literature No. 11102)

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SAM4C32-EK [USER GUIDE]
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Table of Contents
1. SAM4C32-EK Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.1 Battery. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.2 Recovery Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2. Power Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.1 Power Up the Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.2 Sample Code and Technical Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3. SAM4C32-EK Hardware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3.1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3.2 Equipment List. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.3 Function Blocks. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.4 Embedded Memories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.5 Communication Interfaces. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3.6 Debug Interfaces. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
3.7 Extend Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
3.8 LCD Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
3.9 Analog I/O . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
3.10 CryptoAuthentication (optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
3.11 LEDs and Buttons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
3.12 Miscellaneous I/O . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
3.13 Metrology Core Serial Interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
3.14 PIO Usage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
3.15 Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
4. SAM4C32-EK Firmware Demonstration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
4.1 SAM4C32-EK Default Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
4.2 Measuring the Backup Mode Current Consumption on VDDBU. . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
5. SAM4C32-EK Design Files . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
5.1 SAM4C32-EK Schematics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
5.2 SAM4C32-EK Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
6. Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

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1. SAM4C32-EK Specifications
The SAM4C32-EK is shipped in a protective anti-static package. The board system
must not be subjected to high electrostatic discharge.
We strongly recommend using a grounding strap or similar ESD protective device when
handling the board in hostile ESD environments (offices with synthetic carpet, for
example). Avoid touching the component pins or any other metallic element on the
board.
1.1 Battery
The SAM4C32-EK ships with a 3V coin battery. This battery is not required for the board to start up as long as
jumper JP8 is closed.
The coin battery is provided for user convenience in case the user would like to exercise the date and time backup
function of the SAM4C32 devices when the board is switched off.
1.2 Recovery Procedure
The demo software is stored in internal Flash memory. If the content of the internal Flash has been erased, it can
be reprogrammed recovered to the state as it was when shipped by Atmel using Atmel SAM-BA®In-system
Programmer available on the Atmel website (www.atmel.com). The binary file of the demo software is also
available on the Atmel website.
Table 1-1. SAM4C32-EK Specifications
Characteristic Specifications
PCB 6 layers, 140 mm x 100 mm
PCB Material Standard FR4 in 1.6 mm thickness
Clock Speed
Crystal 8 MHz
Piezoelectric Ceramic Resonator 8.192 MHz
32.768 kHz external clock
Ports
RS232
RS485
USB
Memory TWI EEPROM
Serial Data Flash
Board Supply Voltage
5V DC from main connector power supply
5V DC from USB
3V Battery for Backup and RTC
ROHS Compliant
CE and FCC Part 15 status Compliant
CAUTION
ESD-Sensitive Electronic Equipment!
Electrostatic
sensitive
device

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2. Power Up
2.1 Power Up the Board
Unpack the board taking care to avoid electrostatic discharge. Unpack the power supply, select the power plug
adapter corresponding to that of your country, and insert it in the power supply.
Connect the power supply DC connector to the board and plug the power supply to an AC power plug. The board
LCD should light up and display a graphic demo program.
2.2 Sample Code and Technical Support
After boot up, designers can run sample code or their own application on the development kit. Users can download
sample code and get technical support from the Atmel website. The SAM4C32-EK is supported by the Atmel
Software Framework (ASF) which is also available on the Atmel website.

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3. SAM4C32-EK Hardware
3.1 Overview
This section introduces the SAM4C32-EK design. It introduces system-level concepts, such as power distribution,
memory, and interface assignments.
The Atmel SAM4C32 microcontroller is a system-on-chip solution for smart energy applications, built around two
high-performance 32-bit ARM Cortex-M4 RISC processors. These devices operate at a maximum speed of 120
MHz and feature up to 2 Mbyte of embedded Flash, 256 Kbytes of SRAM and on-chip cache for each core.
The dual ARM Cortex-M4 architecture allows for integration of application layer, communications layers and
security functions in a single device, with the ability to extend program and data memory via a 16-bit external bus
interface. The peripheral set includes an advanced cryptographic engine, two anti-tamper pins with time-stamping
function, floating point unit (FPU), five USARTs, two UARTs, two TWIs, up to seven SPIs, as well as a PWM timer,
two 3-channel general-purpose 16-bit timers, temperature compensable low-power RTC running on backup area
down to 0.5 µA, and a 50 x 6 segmented LCD controller.
The SAM4C series is a scalable platform providing, alongside Atmel's industry leading SAM4 standard
microcontrollers, unprecedented cost structure, performance and flexibility to smart meter designers worldwide.
Figure 3-1. SAM4C32-EK Board Architecture
SAM4C32C
LQFP100
UART
TO
USB
Serial Debug
AT30TS75
Temperature Sensor
UART1
JTAG
USART2
3V3
LDO
USART0
VDDBU
TWI
XPRO
Extension
LCD
RS485
3V3
FWUP,
Reset
Tamper 0,
Tamper 2
SHDN
1
6
SCROLL UP,
SCROLL DOWN
4-Wire
RS232
2-Wire
RS232
SPI, TWI, UART, ADC,...
SPI 0
RZ600
Wireless
ATSHA204
CryptoAuthentication
(Optional)
AT24C
EEPROM

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3.2 Equipment List
3.2.1 Features List
CPU SAM4C32 with its embedded resources
8 MHz and 32.768 kHz Quartz Crystal, SMB connector for external source
Main regulator 5V/3.3V with red LED indicator
Lithium Coin Cell Battery
Main board with:
Custom segmented LCD
Shared interface RS232 / RS485
Serial data Flash SPI
Two-Wire Serial EEPROM
Two-Wire Temperature Sensor
Two-Wire CryptoAuthentication™ Memory (optional)
Debug solution:
2 peripheral Input/Output extension connectors HE10 (PIO A, B)
Peripheral Input/Output extension connector HE10 (PIO Sense)
JTAG/ICE interface
UART/USB bridge Device Communication interface
Analog
Analog 3V reference
Potentiometer connected on ADC input
Buttons
4 system push buttons: Reset, Force Wake-Up, Tamper 0, Tamper 2
2 user push buttons: Scroll Up and Scroll Down
LEDs
Amber LED
Blue LED
Green LED
3.2.2 Interface Connection
The SAM4C32-EK board includes the following hardware interfaces:
RS232/RS485 (USART0 RX, TX, RTS, CTS) connected to:
9-way male D-type RS232 connector
3-pin connector
JTAG/SWD 20-pin IDC connector
5-pin Micro AB USB connector (bridge UART)
3 PIOs connected to HE10 connectors

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Figure 3-2. Annotated SAM4C32-EK Board Layout
RS232 Interface
Zigbee Interface
System Buttons
Atmel Custom LCD
XPRO Interface
PIO Extension
PIO Extension PIO Metering
Extension
Battery Coin Cell
User Buttons
Atmel SAM4C32
JTAG Interface
Debug Interface
+
Power Supply
RS485 Interface
Power Supply

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3.3 Function Blocks
3.3.1 Processor
The SAM4C32-EK board is equipped with a SAM4C32 device in an LQFP100 package.
Figure 3-3. SAM4C32 Processor
3.3.2 Clock Distribution
The SAM4C32-EK board includes two clock systems (see Table 3-1 and Figure 3-4).
Figure 3-4. Clock System
ATMEL
Cortex-M4 Processor
SAM4C32 LQFP100
R1.R2 should close to SAM4C32.
Do Not Populate
PA0 PA1 PA2 PA3 PA4 PA5 PA6 PA7 PA8 PA9 PA10 PA11 PA12 PA13 PA14 PA15 PA16 PA17 PA18 PA19 PA20 PA21 PA22 PA23 PA24 PA25 PA26 PA27 PA28 PA29
PB4
PB5
PB6
PB7
PB8
PB9
PB10
PB11
PB12
PB13
PB14
PB15
PB16
PB17
PB18
PB19
PB20
PB21
PB22
PB23
PB24
PB25
PB26
PB27
PB28
PB29
PB30
PB31
PC0
PC1
PC2
PC3
PC4
PC5
PC6
PC7
PC8
PB0
PB1
PB2
PB3
FWUP
PC9
JTAGSEL
SHDN
TST
NRST
XOUT32
XIN32
TMP0
PA31
PA30
XIN
XOUT
VDDIN VDDOUT VDDCORE VDDPLL VDDLCD VDDIO VDDBU
VDDREF
SHDN
{4}
FWUP{7}
TMP0{7}
R2 0R/DNP DNPR2 0R/DNP DNP
R1 0R/DNP DNP R1 0R/DNP DNP
MN1MN1
PB6 1
PB7 2
PB18 3
GND_1
4
PB19 5
PB8 6
PB22 7
PB30 8
PB25 9
PB24 10
VDDCORE_1
11
PB29 12
PB9 13
PB10 14
PB11 15
PB12 16
PB14 17
PB15 18
PA26 19 PA25 20 PA24 21 PA20 22 PA19 23 PA18 24
PA8 25
TDI/PB0
26
TCK/SWCLK/PB3
27 TMS/SWDIO/PB2
28
ERASE/PC9
29
TDO/TRACESWO/PB1
30 PC1 31
PC6 32
VDDIO_1
33
VDDBU
34
FWUP
35
JTAGSEL
36
SHDN
37
TST
38
TMP0
39
XIN32
40
XOUT32
41
GND_2
42
PB4 43
VDDCORE_2
44
PB5 45
PC7 46
PC0 47
NRST
48
VDDIO_2
49
PA30/XOUT
50
PA31/XIN
51
GND_3
52
VDDPLL
53
PC8 54
PC5 55
PC4 56
PC3 57
PC2 58
PA29 59 PA28 60 PA27 61
PA6 62
VDDCORE_3
63
PA3 64
PA21 65 PA22 66 PA23 67
PA9 68
PA10 69 PA11 70 PA13 71 PA14 72 PA15 73 PA16 74 PA17 75
VDDIO_3
76
ADVREF 77
GND_4
78
PB31/AD5 79
PB23/AD4 80
PB13/AD3 81
PA5/AD2 82 PA4/AD1 83
PA12/AD0 84
VDDIN
85
VDDOUT
86
PB21 87
PB20 88
VDDCORE_4
89
PA0 90
PB27 91
VDDLCD
92
PB26 93
PB28 94
PB16 95
PA1 96
PB17 97
PA7 98
VDDIO_4
99
PA2 100
Table 3-1. Components Clock System
Qty Description Component Assignment
1 Crystal for Internal Clock 8 MHz Y2
1 Crystal for RTC Clock 32.768 kHz Y1
XOUT
XIN
C20 18pFC20 18pF
Y2
8MHz
Y2
8MHz
1 2
3
4
R9 0R R9 0R
R6 0RR6 0R
C24 18pFC24 18pF
XIN32
XOUT32
RTC_32
{4}
R4 0RR4 0R
Y1
32.768 kHz
Y1
32.768 kHz
C19
18pF
C19
18pF
R5 0R R5 0R
C1
18pF
C1
18pF
R3 0R/DNP
DNP
R3 0R/DNP
DNP

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3.3.3 Reset and Wake-Up Circuitry
The reset sources for the EK board are:
Power-on reset
Push-button reset (refer to Section 3.11.2 “Push Buttons”)
JTAG reset from an in-circuit emulator
3.3.4 Power Supplies
The SAM4C32-EK board evaluation and development platform embeds all the necessary power rails required for
the SAM4C32 processor and peripherals.
The SAM4C32-EK board can be supplied by either a 5V DC block through input J2 (see Figure 3-5) or a USB
connection via J6 (refer to “DBGU/USB Bridge Schematic” on page 15).
A manual power supply selection switch (SW1) is provided to power on/off the main power line.
Figure 3-5. Power Supply Schematic
3.3.5 Power Rails
The SAM4C32 supports 1.6V–3.6V single supply mode (VDDIN). An internal regulator input is connected to the
source and its output feeds VDDCORE (VDDOUT connected to VDDCORE).
When the 3.3V supply is present, the Power LED D5 is lit. Test points TP2 to TP5 are used to perform testing.
USB5V
U1
ZEN056V130A24LS
U1
ZEN056V130A24LS
1
2
3
J2
TWTJ-020-04P2
J2
1
2
3
D2
NSR0320MW2T1G
D2
NSR0320MW2T1G
D3
NSR0320MW2T1G
D3
NSR0320MW2T1G
5V
TP4TP4
C29
100nF
C29
SW1
8SS1012-Z
SW1
3
1
2
R12 1.5KR12
C31C31
C30
10µF
C30
10µF
Table 3-2. Power Supply Voltage Ranges
Power Supply Ranges Comments
VDDIO 1.6V–3.6V
Flash Memory Charge Pumps Supply for Erase and Program Operations, and Read
operation
Input Output buffers Supply
VDDBU 1.6V–3.6V Backup Area power supply. VDDBU is automatically disconnected when VDDIO is present
(> 1.9V)
VDDIN 1.6V–3.6V 1.6V min. if LCD and ADC not used, 2.5V otherwise
VDDLCD 2.5V–3.6V
LCD Voltage Regulator Output
External LCD power supply input (LCD regulator not used)
VDDIO/VDDIN need to be supplied when the LCD Controller is used
VDDOUT 1.2V Output 120 mA Output Current
VDDPLL 1.08V–1.32V –
VDDCORE 1.08V–1.32V –

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Figure 3-6. Power Rails Schematic
Note: Test points and jumpers are provided for easy access to each of the regulated power lines and measure the current on
each line.
3.3.6 Battery Backup
The VDDBU pin is powered from the 3.3V rail or from a backup battery BT1 via a dual Schottky diode D4.
Test points TP8 and jumper JP8/JP10 are used to perform voltage and current measurements.
Figure 3-7. Backup Battery Schematic
3.4 Embedded Memories
I2C for data storage in EEPROM (Atmel AT24C1024B)
SPI Serial Flash AT45 or AT25F
3.4.1 TWI EEPROM
The AT24C1024B provides 1,048,576 bits of serial electrically erasable and programmable read-only memory
(EEPROM) organized as 131,072 words of 8 bits each.
Device slave address byte: 0x50.
Vout = 0.8 x (1 + Rtop/Rbottom)
3V3 POWER
FORCE
POWER
ON
FORCE_ON
FORCE_ON
5V
5V 3V3
3V3
SHDN
{3}
TP7
Q1
Si1563EDH
Q1
Si1563EDH
1 32
456
R15
100K Ω
R15
100
C43
15pF
C43
C39
10µF
C38
1µF
C38 C41
1µF
R14
100K Ω
R14
D5
RED
RED
R16 47K Ω1%
U2 RT9018A U2 RT9018A
PGOOD
1
EN
2
VIN
3
VDD
4NC 5
VOUT 6
ADJ 7
GND 8
VSS
9
C35 10nF C35
R20R20 10K Ω
R18
15
15K Ω1%
C36
100nF
C36
JP9JP9
R19R19
10K Ω
C44
1µF
C44
R17
470Ω
C37
10µF
C37
close to SAM4C32
VDDOUT VDDCORE
VDDPLL
C34
22µF
C34
22
JP6JP6
L2L2
56µH
TP6TP6
R13
2.2R
R13
.
C32
2.2µF/DNP
C32 C33
100nF
C33
100nF
JP7JP7
TP5TP5
VDDMAIN
3V3
VDDIN
VDDIO
TP10TP10
JP13JP13
TP12TP12
JP12JP12
TP11TP11
JP11JP11
Power LED
Do Not Populate
VDDBU
VBATT
VDDIN
VDDBU BT1
JP10
C42
100nF
C40
2.2µF
TP8
D4
BAT54C
D4
BAT54C
3
2
1
JP8

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Figure 3-8. TWI EEPROM Schematic
3.4.2 SPI Serial Flash
The SAM4C32-EK embeds one serial Flash device AT25DFxx or AT45DBxx connected through the SPI. (The
AT25DF321A is mounted by default.)
Figure 3-9. SPI Serial Flash Schematic
3.4.3 Adesto®Compatible Devices
ADDR: 0X50
(SCL)
(SDA)
PA25
PA24
VDDMAIN
VDDMAIN
VDDMAIN
C62 100nF
R45
0R
R42
4.7K
R41
4.7K
R46
0R
R40
0R/DNP
U4
AT24C1024B
A0
1
A1
2
A3
3
GND
4
SDA
5SCL
6
WP
7
VCC
8
R39
0R/DNP
Do Not Populate
U13 and U10 PCB footprints
differ by 90 degrees and are stacked.
R100 to R103 should be close to SAM4C32.
SPI0_MISOC
SPI0_NPCSC
PA7 SPI0_MOSIC
PA6 SPI0_MISOC
PA8 SPI0_SPCKC
SPI0_MOSIC
SPI0_SPCKC
SPI0_NPCSCPA5
VDDIN
VDDIN
VDDIN
VDDIN
R105 470K
R103 0R
U13
AT45DB321D DNP
SI
1
SCK
2
/RESET
3
/CS
4/WP 5
VCC 6
GND 7
SO 8
R101 33R
R102 33R
C80
100nF
U10
AT25DF321A-SH-B
/CS
1
SO
2/WP 3
GND 4
SI
5
SCK
6/HOLD 7
VCC 8
R100 33R
Do Not Populate
Table 3-3. Compatible Devices
Adesto®AT45DB Series Devices Adesto AT25DF Series Devices
AT45DB64D2-CNU AT25DF641A-SH
AT45DB321D-MWU AT25DF321A-SH
AT45DB131D-SS AT25DF161-SH
AT45DB081D-SS AT25DF081-SSH
AT45DB041D-SS AT25DF021-SH
AT45DB021D-SS –
AT45DB011D-SS –

SAM4C32-EK [USER GUIDE]
Atmel-11253A-ATARM-SAM4C32-EK-UserGuide_17-Sep-14
13
3.5 Communication Interfaces
3.5.1 Serial Port USART2 RS232
The USART2 is buffered with one RS-232 Transceiver ADM3312E (Analog Devices) and is connected to a DB9
connector. A classic implementation RS232 transceiver selection should include double source capability. The
USART2 connector with RTS/CTS handshake signal support is connected to the RS232 transceiver.
Features:
One RS232 transceiver connected to RXD2, TXD2, RTS2, and CTS2
One DB9 male connector
Required resistors and capacitors
Figure 3-10. USART2 RS232 Schematic
3.5.2 Serial Port USART2 RS485
The USART2 is buffered with an Analog Devices ADM3485 RS-485/RS-422 transceiver and is connected to a 3-
point jumper.
Features:
One RS485 transceiver connected to RXD2, TXD2 and RTS2, CTS2
One 3-point connector
Required resistors and capacitors
Figure 3-11. USART2 RS485 Schematic
Male
Straight Angle
USART2
(RXD2)
(TXD2)
(RTS2)
(CTS2)
PA15
PA14
PA9_232
PA10
VDDMAIN
VDDMAIN
VDDMAIN
FGND
R28 0R
C51
100nF
R26 0RR
C47
4.7µF
MN3
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
T1IN
7T1OUT 18
R1I N 15 R1OUT
10
T2IN
8T2OUT 17
R2I N 14 R2OUT
11
T3IN
9T3OUT 16
R3I N 13 R3OUT
12
R31 0R
J3J3
5
4
3
2
1
9
8
7
6
10
11
C49
100nF
C53
100nF
C48
100nF
R33 0R
C50
100nF
R35 0RR34 47K
R25
R30 0R
C52
100nF
Do Not Populate
47K/DNP
(RXD2)
(TXD2)
(RTS2)
(CTS2)
RS 485
PA15
PA9_485
PA10
PA14
PA9
PA9_232
PA9_485
VDDMAIN
VDDMAIN
VDDMAIN
FGND
R32 0R
R37
120R
R23
10K
R29 0R
R27 0R
J4
1
2
3
R36 0R
MN4
ADM3485ARZ
RO
1
RE
2
DE
3
DI
4
VCC 8
GND 5
A6
B7
C54
100nF
R38
R24
JP15
1
2
3
Do Not Populate
Do Not Populate
JP14
3.3K/DNP
JP16
3.3K/DNP
JP17

14
SAM4C32-EK [USER GUIDE]
Atmel-11253A-ATARM-SAM4C32-EK-UserGuide_17-Sep-14
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
(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
7T1OUT 18
R1I N 15 R1OUT
10
T2IN
8T2OUT 17
R2I N 14 R2OUT
11
T3IN
9T3OUT 16
R3I N 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

SAM4C32-EK [USER GUIDE]
Atmel-11253A-ATARM-SAM4C32-EK-UserGuide_17-Sep-14
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®and Atmel SAM-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
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}
R138R137R136
J11
12
3
4
56
78
910
11
12
13
15
17
19
14
16
18
20
BP6
1
4
2
3
R134
R149
100K Ω
R148 33Ω
JP24JP24
1
2
3
R135
100K Ω 100K Ω 100K Ω 100K Ω
DBGU/USB Bridge
(RXD0)
(TXD0)
PB4
PB5
FGND
3V3OUT
3V3OUT
5V
3V3OUT
USB5V
D6 Green
U8
FT232RL
FT232RL
TXD 1
DTR# 2
RTS# 3
VCCIO
4
RXD 5
RI# 6
GND1
7
NC1
8DSR# 9
DCD# 10
CTS# 11
CBUS4 12
CBUS2 13
CBUS3 14
USBDP
15 USBDM
16
3V3OUT
17
GND2
18
RESET#
19
VCC
20
GND3
21
CBUS1 22
CBUS0 23
NC2
24
AGND
25
TEST 26
OSCI
27
OSCO
28
R58 0R
R57 0R
R60 4.7K/DNP
R59 0R
C72
100nF
C66
10nF
C71
47pF
R64 10K/DNP
R65 0R
C64
4.7µF/16V
C70
47pF
C68
100nF
C68
R56 0R
R62 470R
5VD-D+IDG
J6
USB Micro AB
5VD-D+IDG
1
2
3
4
7
5
6
8 9
10
11
L3
220Ωat 100MHz
1 2
D7 Red
R61 470R6
R63 0R
C67
100nF
Do Not Populate
Do Not Populate

16
SAM4C32-EK [USER GUIDE]
Atmel-11253A-ATARM-SAM4C32-EK-UserGuide_17-Sep-14
3.7 Extend Interfaces
The SAM4C32-EK embeds two connectors to interface Atmel IEEE 802.15.4-compliant wireless transceivers for
ZigBee®-based applications.
Features:
Atmel RZ600 module
Atmel REB233-XPRO module
3.7.1 RZ600 Interface
The RZ600 interface connects with Atmel modules used for ZigBee communication platforms that are
equipped with a 10-pin HE10 male connector.
Figure 3-15. RZ600 Interface Schematic
.
3.7.2 REB233-XPRO Interface
The XPRO interface connects with new Atmel modules used for XPRO platforms that are equipped with a 20-pin
HE14 male connector.
Figure 3-16. XPRO Interface Schematic
Table 3-4. RZ600 Pin Functions
Function Pin Pin Function
Reset 1 2 IRQ0
Interrupt Request 3 4 SLP_TR
SPI Chip Select 5 6 SPI MOSI
SPI MISO 7 8 SPI CLK
Power Ground 9 10 Power Supply
(SPI0_NPCS0)
(SPI0_MISO)
(SPI0_MOSI)
(SPI0_SPCK)
ZigBee
R70 to R73 should be close to SAM4C32.
(ZB_IRQ1)
(ZB_RSTN) (ZB_IRQ0)
(ZB_SLPTR)
PA7
PA11
PA5
PA6 PA8
PA12
PA17
PA18
VDDMAINR72 33R
R67 0R
C74
2.2nF
L4 220Ωat 100MHz
R70 0R
JP18
C75
2.2µF
R66 0R
J7J7
1 2
3 4
5 6
7 8
910
R68 0R
R71 33R
R73 33R
R69 0R
C73
18pF
(ID_DATA)
(ADC_0)
(ADC_2)
(PWM_0/RST_ZB)
(PWM_2/IRQ)
(TWI_SDA)
(UART_RX)
(SPI_SS_0)
(SPI_MISO)
(ADC_1)
(ADC_3)
(PWM_1)
(PWM_3/SLP_TR/SPI_SS_1)
(TWI_SCL)
(UART_TX)
(SPI_MOSI)
(SPI_SCK)
XPRO
R84, R83 Should be close to SAM4C32.
PB23
PA12
PA5
PB18
PA22
PA24
PB16
PB22
PB20
PA4
PB13
PC7
PB15
PA25
PB17
PB19
PB21 VDDMAIN
R79 0R
R89 0R
L5 220Ωat 100MHz
R82 0R
R87 0R R88 0R
R77 0R
C78
2.2µF
R76 0R
R83 0R
R85 0R
C76
18pF
C77
2.2nF
R80 0R
R81 0R
R84 0R
R78 0R
R74 0R
J8
12
34
56
7 8
910
11 12
13 14
15 16
17 18
19 20
R90 0R
R75 0R
R86 0R
Do Not Populate
JP19
HE14 100-mil right angled male DNP

SAM4C32-EK [USER GUIDE]
Atmel-11253A-ATARM-SAM4C32-EK-UserGuide_17-Sep-14
17
3.8 LCD Display
The SAM4C32-EK board is equipped with one segmented LCD interfaced with the SAM4C32 device through the
LCD controller. Note that only certain segments (highlighted in blue in Figure 3-17 on page 17) are usable without
using U11 and U12 analog switches or unpopulated 0 ohm resistors.
Features:
Segmented LCD YMCC42364AAANDCL (Anshan Yes Optoelectronics Display Co., Ltd.)
Figure 3-17. LCD Display Schematic
Table 3-5. XPRO Pin Functions
Function Pin Pin Function
Module Identity 1 2 Ground
ADC Input 3 4 ADC Input
ADC Input 5 6 ADC Input
ZigBitReset 7 8 PWM Output
IRQ Interrupt from ZigBit to Host Processor 9 10 SLP_TR wake-up signal to ZigBit
Two-Wire Data Line 11 12 Two-Wire Clock Line
UART RX Line 13 14 UART TX Line
SPI Chip Select 15 16 SPI MOSI
SPI MISO 17 18 SPI Clock
Power Ground 19 20 Power Supply
PB9 PA1 PB8 PA2 PB7 PB6
PB30
PA0 PA3
PB31 PA28 PA27 PA26 PA23
PB11 PA23 PB12 PB6 PB13 PA26 PB14 PA27 PA28 PB7 PB8 PB9 PB10
PA16
PB23 PB24 PB25 PB26
PB27 PB28 PB29
PB15
PB16
PB17
PB18
PB21
PB22
PB19
PB20
PA13
VDDMAIN
VDDMAIN
VDDMAIN
R95
0R
C79 100nF
R121 0R
R114 DNP
R92
0R
R117 0R
U12
74HC4066
1Y 1 1Z
2
2Z
32Y 4
2E
53E 6
GND
7
3Y 8 3Z
9
4Z
10 4Y 11
4E 12
1E
13
VCC 14
R96
0R
R104
4.7K
R99 49R9
JP20
C83 100nF
Q2
IRLML6401
1
32
R112 DNP
R93
0R
R111 DNP
C82
100nF
C82
R106R106
100R
R910R
R109 DNP
C81
10µF
C81
R108 DNP
R115 0R
R120 0R
R98
0R
R107 DNP
U11
74HC4066
1Y 1 1Z
2
2Z
32Y 4
2E
53E 6
GND
7
3Y 8 3Z
9
4Z
10 4Y 11
4E 12
1E
13
VCC 14
R97
0R
R119 0R
U9 YMCC42364AAANDCL
COM3 1 COM2 2 COM1 3 COM0 4
SEG_0 5 SEG_1 6 SEG_2 7 SEG_3 8 SEG_4 9 SEG_5 10 SEG_6 11 SEG_7 12 SEG_8 13 SEG_9 14
SEG_10 15 SEG_11 16
SEG_12
17 SEG_13 18 SEG_14 19 SEG_15 20 SEG_16 21 SEG_17 22 SEG_18 23 SEG_19 24 SEG_20 25 SEG_21 26 SEG_22 27 SEG_23 28 SEG_24 29 SEG_25 30 SEG_26 31 SEG_27 32 SEG_28 33 SEG_29 34 SEG_30 35 SEG_31 36 SEG_32 37 SEG_33 38 SEG_34 39 SEG_35 40 SEG_36 41 SEG_37 42 SEG_38 43 SEG_39 44
LED+
45
LED-
46
R110 DNP
R122 0R
R94
0R
R116 0R
R113 DNP
R118 0R
Do Not Populate

18
SAM4C32-EK [USER GUIDE]
Atmel-11253A-ATARM-SAM4C32-EK-UserGuide_17-Sep-14
Figure 3-18. LCD Layout
.
Table 3-6. LCD pinout vs Segment
Pin COM0 COM1 COM2 COM3 Pin COM0 COM1 COM2 COM3
1 – – – COM3 23 A5-a A5-b A5-c B12
2 – – COM2 – 24 A5-g A5-j A5-L A5-m
3 – COM1 – – 25 A4-h A4-i A4-k A4-n
4 COM0 – – – 26 B6 A4-f A5-e A5-d
5 G1G0G2G3 27 A4-aA4-bA4-cB11
6 G4 G5 G6 G7 28 A4-g A4-j A4-L A4-m
7 E0 E2 E4 E6 29 A3-h A3-i A3-k A3-n
8 E1 E3 E5 E7 30 B4 A3-f A3-e A3-d
9 D3-a D3-b D3-c B9 31 A3-a A3-b A3-c B10
10 D3-f D3-g D3-e D3-d 32 A3-g A3-j A3-L A3-m
11 D2-a D2-b D2-c D2-p 33 A2-h A2-i A2-k A2-n
12 D2-f D2-g D2-e D2-d 34 B3 A2-f A2-e A2-d
13 D1-a D1-b D1-c D1-p 35 A2-a A2-b A2-c B1
14 D1-f D1-g D1-e D1-d 36 A2-g A2-j A2-L A2-m
15 D0-a D0-b D0-c D0-p 37 A1-h A1-i A1-k A1-n
16 D0-f D0-g D0-e D0-d 38 B2 A1-f A1-e A1-d
17 A6-h A6-i A6-k A6-n 39 A1-a A1-b A1-c B8
18 B14 A6-f A6-e A6-d 40 A1-g A1-j A1-L A1-m
19 A6-a A6-b A6-c B13 41 A0-h A0-i A0-k A0-n
a
b
c
d
e
fghi
jk
Lmn

SAM4C32-EK [USER GUIDE]
Atmel-11253A-ATARM-SAM4C32-EK-UserGuide_17-Sep-14
19
20 A6-g A6-j A6-L A6-m 42 B0 A0-f A0-e A0-d
21 A5-h A5-i A5-k A5-n 43 A0-a A0-b A0-c B7
22 B5 A5-f A5-e A5-d 44 A0-g A0-j A0-L A0-m
Table 3-7. LCD PIO Mapping
Pin Name LCD Pin PIO PIO LCD Pin Pin Name
COM0 4 PA0 PA1 3 COM1
COM2 2 PA2 PA3 1 COM3
SEG0 5 PB30 PB31 6 SEG1
SEG2 7 Not
used
Not
used 8 SEG3
SEG4 9 PB9 PB8 10 SEG5
SEG6 11 PB7 PB6 12 SEG7
SEG8 13 PA28 PA27 14 SEG9
SEG10 15 PA26 PA23 16 SEG11
SEG12 17 PB29 PB28 18 SEG13
SEG14 19 PB27 PB26 20 SEG15
SEG16 21 PB25 PB24 22 SEG17
SEG18 23 PB23 PB22 24 SEG19
SEG20 25 PB21 PB20 26 SEG21
SEG22 27 PB19 PB18 28 SEG23
SEG24 29 PB17 PB16 30 SEG25
SEG26 31 PB15 PB14 32 SEG27
SEG28 33 PB13 PB12 34 SEG29
SEG30 35 PB11 PB10 36 SEG31
SEG32 37 PB9 PB8 38 SEG33
SEG34 39 PB7 PB6 40 SEG35
SEG36 41 PA28 PA27 42 SEG37
SEG38 43 PA26 PA23 44 SEG39
Table 3-6. LCD pinout vs Segment (Continued)
Pin COM0 COM1 COM2 COM3 Pin COM0 COM1 COM2 COM3

20
SAM4C32-EK [USER GUIDE]
Atmel-11253A-ATARM-SAM4C32-EK-UserGuide_17-Sep-14
3.9 Analog I/O
3.9.1 Analog Reference
The SAM4C32 features an LM4040 precision micropower curvature-corrected bandgap shunt voltage reference
with several fixed reverse breakdown voltages. The device voltage reference on the board is 3.0V.
Figure 3-19. Analog Reference Schematic
3.9.2 Analog Input
One VR1 multi-turn 10K Ωpotentiometer is connected to the jumper JP4. If JP4 is closed, this analog reference is
available on analog input PA4.
Figure 3-20. Analog Input Schematic
+3V3
+3V
ADVREF
VDDIN
VDDREF
5V
R8
.2.2Ω
D1
C25
22µF
R7
C22
2.2µF
C27
10nF
+
C26
10µF
TP3
L1
56µH
C23
100nF
C28
100nF
TP2
JP5
1
2
3
RC0603JR-073K3L
LM4040AIM3X-3.0/NOPB
(Analog input) PA4
VDDIN
C21
10nF
JP4
VR1
10K
3
1
2