OLIMEX SAM3-P256 User Manual

SAM3-P256 development board

user's manual

All boards produced by Olimex are ROHS compliant

Rev. C, September 2014

Copyright(c) 2011, OLIMEX Ltd, All rights reserved

Page 1

INTRODUCTION:

Atmel's ATSAM3S4BA-AU is a member of a series of Flash microcon-

trollers based on the high performance 32-bit ARM Cortex-M3 RISC processor. It
operates at a maximum speed of 64 MHz and features a 256 Kbyte Flash and a 48
Kbyte SRAM, Full Speed USB Device port with embedded transceiver, a High
Speed MCI for SDIO/SD/MMC, an External Bus Interface featuring a Static Mem­ory Controller providing connection to SRAM, PSRAM, NOR Flash and NAND
Flash, 2x USARTs, 2xUARTs, 2xTWIs, 3xSPI, an I2S, as well as 1 PWM timer, 6x
general-purpose 16-bit timers, an RTC, an ADC, a 12-bit DAC and an analog com­parator.

SAM3-P256 has JTAG, UEXT, USB and two RS232 connectors, power jack,

potentiometer, two user buttons, two status LEDs, power-on led, reset button and
prototype area for all microcontroller's ports. All this gives the customer chance to
build a wide range of applications.

BOARD FEATURES:

 Microcontroller: ATSAM3S4BA-AU.

 standard JTAG connector with ARM 2×10 pin layout for program-

ming/debugging with ARM-JTAG

 USB connector

 Two channel RS232 interface and drivers

 SD/MMC card connector

 two buttons

 trimpot connected to ADC

 thermistor connected to ADC

 two status LEDs

 on board voltage regulator 3.3V with up to 800mA current

 single power supply: 6VDC or 4.5 VAC required

 power supply LED

 RESET circuit

 RESET button

 12.000 Mhz crystal on socket

 UEXT connector

 prototype area for all microcontroller's ports

 PCB: FR-4, 1.5 mm (0,062"), red soldermask, silkscreen component

print

 Dimensions: 120×80 mm (4.72×3.15")

Page 2

ELECTROSTATIC WARNING:

The SAM3-P256 board is shipped in protective anti-static packaging. The board
must not be subject to high electrostatic potentials. General practice for working
with static sensitive devices should be applied when working with this board.

BOARD USE REQUIREMENTS:

Cables: The cable you will need depends on the programmer/debugger you use.

OLIMEX debuggers need USB type B to USB type A cable to connect to a
computer.

Hardware: The best idea is to use a debugger made by Atmel, since the main
microcontroller is made by Atmel.

Another reliable choice is Segger's JLINK which is well-supported works with most
ARM products.

If you are looking for open-source development please check the Olimex-made
debuggers: ARM-USB-OCD, ARM-USB-TINY, ARM-USB-OCD-H, ARM-USB-

TINY-H if you work with OpenOCD, IAR EW for ARM, Rowley Crossworks for

ARM, CooCox, GCC compilers, etc.

PROCESSOR FEATURES:

SAM3-P256 board use ARM-based microcontroller ATSAM3S4BA-AU LQFP64

from Atmel Corporation with these features:

 Core

 ARM® Cortex®-M3 revision 2.0 running at 64 MHz

 Memory Protection Unit (MPU)

 Thumb®-2 instruction set

 Pin-to-pin compatible with AT91SAM7S legacy products (48- and 64-pin

versions)

 Memories

 256 Kbytes embedded Flash, 128-bit wide access, memory accelerator,

single plane

 48 Kbytes embedded SRAM

 16 Kbytes ROM with embedded bootloader routines (UART, USB) and

IAP routines

 Memory Protection Unit (MPU)

 System

 Embedded voltage regulator for single supply operation

Page 3

 Power-on-Reset (POR), Brown-out Detector (BOD) and Watchdog for

safe operation

 Quartz or ceramic resonator oscillators: 3 to 20 MHz main power with

Failure Detection and optional low power 32.768 kHz for RTC or
device clock

 High precision 8/12 MHz factory trimmed internal RC oscillator with 4

MHz default frequency for device startup. In-application trimming
access for frequency adjustment

 Slow Clock Internal RC oscillator as permanent low-power mode

device clock

 Two PLLs up to 130 MHz for device clock and for USB

 Temperature Sensor

 Up to 22 peripheral DMA (PDC) channels

 Low Power Modes

 Sleep and Backup modes, down to 3 μA in Backup mode

 Ultra low power RTC

 Peripherals

 USB 2.0 Device: 12 Mbps, 2668 byte FIFO, up to 8 bidirectional

Endpoints. On-Chip Transceiver

 2 USARTs with ISO7816, IrDA®, RS-485, SPI, Manchester and Modem

Mode

 Two 2-wire UARTs

 2 Two Wire Interface (I2C compatible), 1 SPI, 1 Serial Synchronous

Controller (I2S), 1 High Speed Multimedia Card Interface (SDIO/SD
Card/MMC)

 3 Three-Channel 16-bit Timer/Counter with capture, waveform,

compare and PWM mode. Quadrature Decoder Logic and 2-bit Gray
Up/Down Counter for Stepper Motor

 4-channel 16-bit PWM with Complementary Output, Fault Input, 12-

bit Dead Time Generator Counter for Motor Control

 32-bit Real-time Timer and RTC with calendar and alarm features

 10-channel ADC with differential input mode and programmable gain

stage

 Two 12-bit DAC outputs

 One Analog Comparator with flexible input selection, Selectable input

hysteresis

 32-bit Cyclic Redundancy Check Calculation Unit (CRCCU)

 I/O

Page 4

 47 I/O lines with external interrupt capability (edge or level

sensitivity), debouncing, glitch filtering and on-die Series Resistor
Termination

 Three 32-bit Parallel Input/Output Controllers, Peripheral DMA

assisted Parallel Capture Mode

Page 5

BLOCK DIAGRAM:

Page 6

MEMORY MAP:

Page 7

SCHEMATIC:

6VDC

4.5VAC

Made by Olimex LTD, Bulgaria, 2013

https://www.olimex.com

+5V_USB

3.3V

AGND

AN_TR

10K

AVCC

AVDD

B1 B2

1

2

BDS

1x2

C1

100n C2

100n

C3

100nC4

100n

C5

NA

C6

47uF/6.3V

C7

470uF/16VDC

C8

100n

C9

NA

C10

100n

C11

10p

C12
100n

C13

10p

C14

2.2uF

C15

47uF/6.3V

C16

33p

C17
100n

C18
100n

C19

100n

C20
100n

C21

10n

C22

15p

C23

15p

C24 100n

C251nC26

2.2uF

C27

100n

C28

100n

C29

100n

C30

100n

D1

FET1

NA(IRLML6402)

FET2

(NA)IRLML6402

G1
DB104(SMD)

GND

GREEN

12

34

56

78

910

1112

1314

1516

1718

1920

JTAG

L1

470nH

1

2

LED1

1x2

1

2

LED2

1x2

+5V

PA0

PA1

PA2

PA3

PA4

PA5
PA6

PA7

PA8

PA9
PA10

PA11
PA12
PA13
PA14

PA15

PA23

PA25

PA26

PA27

PA28

PA29

PA30

PA31

PB0
PB1

PB2
PB3

PB4
PB5

PB12

PB13

PB14

PWR

PWR_LED

Q1

12MHz/SMD

R1

R2

240/1%

R3

560

R4

390/1%

R5

0R

R6

10KR710KR8

330

R9

330

R10

560

R11

560

R12
330

R13
330

R14

47K

R15

47K

R16

47K

R17
47K

R18

47K

R19

0

R20
NA

R21

0

R22

10K

R230R24

33K

R25

33K

R26

2K

R27

(NA)1.5K

R28

(NA)47K

R29

15K

R30

47K

R31

47K

R32

22K

R33

(NA)100

R34

47K

R35

0

R36

27R

R37

33K

R38

2K

R39

27R

R40
330K

R41

330K

R42

0

R43

NA(1.5K)

R44

NA(47K)

R45
10K

R46

NA(100)

R47

4.7K

R48

4.7K

RESET

1

2

3

4

5

6

7

8

9

RS232_0/D

1

2

3

4

5

6

7

8

9

RS232_1

RST

RXD0/DRXD

1x3

SD/MMC

SD-CARD

CD/DAT3/CS

1

CLK/SCLK

5

CMD/DI

2

CP1

13

CP2

15

DAT0/DO

7

DAT1/RES

8

DAT2/RES

9

VDD

4

VSS1

3

VSS2

6

WP1

10

WP2

14

1

2

TEST

1x2

TH1

TERMISTOR

TXD0/DTXD

1x3

C1+

1

C1-

3

C2+

4

C2-

5

R1IN

13

R1OUT

12

R2IN

8

R2OUT

9

T1IN

11

T1OUT

14

T2IN

10

T2OUT

7

V+

2

V-

6

U1

MAX3232

GNDVCC

1516

U1PWR

U2
MCP130T

GND

VCC RESET

12

U3

ATSAM3S4BA-AU

ADVREF

1

GND1

2

GND2

17

GND3

46

GND4

60

JTAGSEL

50

NRST

39

PA0/PWMH0/TIOA0/A17/WKUP0

48

PA1/PWMH1/TIOB0/A18/WKUP1

47

PA2/PWMH2/SCK0/DATRG/WKUP2

44

PA3/TWD0/NPCS3

43

PA4/TWCK0/TCLK0/WKUP3

36

PA5/RXD0/NPCS3/WKUP4

35

PA6/TXD0/PCK0

34

PA7/RTS0/PWMH3/XIN32

32

PA8/CTS0/ADTRG/WKUP5/XOUT32

31

PA9/URXD0/NPCS1/PWMFI0/WKUP6

30

PA10/UTXD0/NPCS2

29

PA11/NPCS0/PWMH0/WKUP7

28

PA12/MISO/PWMH1

27

PA13/MOSI/PWMH2

22

PA14/SPCK/PWMH3/WKUP8

21

PA15/TF/TIOA1/PWML3/WKUP14/PIODCEN1

20

PA16/TK/TIOB1/PWML2/WKUP15/PIODCEN2

19

PA17/TD/PCK1/PWMH3/AD0

9

PA18/RD/PCK2/A14/AD1

10

PA19/RK/PWML0/A15/AD2/WKUP9

13

PA20/RF/PWML1/A16/AD3/WKUP10

16

PA21/RXD1/PCK1/AD8

11

PA22/TXD1/NPCS3/NCS2/AD9

14

PA23/SCK1/PWMH0/A19/PIODCCLK

15

PA24/RTS1/PWMH1/A20/PIODC0

23

PA25/CTS1/PWMH2/A23/PIODC1

25

PA26/DCD1/TIOA2/MCDA2/PIODC2

26

PA27/DTR1/TIOB2/MCDA3/PIODC3

37

PA28/DSR1/TCLK1/MCCDA/PIODC4

38

PA29/RI1/TCLK2/MCCK/PIODC5

41

PA30/PWML2/NPCS2/MCDA0/WKUP11/PIODC6

42

PA31/NPCS1/PCK2/MCDA1/PIODC7

52

PB0/PWMH0/AD4

3

PB1/PWMH1/AD5

4

PB2/URXD1/NPCS2/WKUP12/AD6

5

PB3/UTXD1/PCK2/AD7

6

PB4/TWD1/PWMH2/TDI

33

PB5/TWCK1/PWML0/WKUP13/TDO/TRACESWO

49

PB6/TMS/SWDIO

51

PB7/TCK/SWCLK

53

PB8/XOUT

61

PB9/XIN

62

PB10/DDM

56

PB11/DDP

57

PB12/PWML1/ERASE

55

PB13/PWML2/PCK0/DAC0

59

PB14/NPCS1/PWMH3/DAC1

63

TST

40

VDDCORE1

12

VDDCORE2

24

VDDCORE3

54

VDDIN

7

VDDIO1

18

VDDIO2

45

VDDIO3

58

VDDOUT

8

VDDPLL

64

BH10S

UEXT

1 2

3 4

5 6

7 8

9 10

USB

USB_B

SHIELD

1

2

3

4

3.3V

3.3V

3.3V

3.3V

3.3V

3.3V

3.3V

3.3V

3.3V

3.3V

3.3V

3.3V

3.3V

3.3V

3.3V3.3V

3.3V

3.3V

3.3V

3.3V

3.3V

3.3V

3.3V

3.3V3.3V 3.3V

AGND

ADJ/GND

IN OUT

VR1(3.3V)
LM1117IMPX-ADJ

VREF

VREF_P

1x2

YELLOW

AD4

AD5

B1B1B2

B2

CP

CP

DM_PUP

DM_PUP

DP_PUP

DP_PUP

LED1

LED1

LED2

LED2

MISO

MISO MISO

MISO

MOSI

MOSI MOSI

MOSI

NPCS0

NPCS0 NPCS0

NPCS1

NPCS1

R0OUT

R0OUT

RST

RST

RST

RST

RTCK

RX0IN

RX1IN

RX1IN

RXD1

RXD1

RXD1

SPCK

SPCK SPCK

SPCK

T0IN

T0IN

TCK

TCK

TDI

TDI

TDO

TDO

TMS

TMS

TRST

TWCK

TWCK

TWD

TWD

TX0OUT

TX1OUT

TX1OUT

TXD1

TXD1

TXD1

USB_D

USB_D

WP

WP

BOARD LAYOUT:

Page 9

POWER SUPPLY CIRCUIT:

SAM3-P256 is typically power supplied with 6 VDC via Power jack, but it can be

also power supplied via USB with +5V.

The programmed board power consumption is about 100 mA with all peripherals

enabled.

RESET CIRCUIT:

SAM3-P256 reset circuit includes U2 (MCP130T), R22 (10k), pin 15 of JTAG

connector, ATSAM3S4BA-AU pin 39 (NRST) and RESET button.

CLOCK CIRCUIT:

Quartz crystal Q1 12.000 MHz is connected to ATSAM3S4BA-AU pin 61 (XOUT)
and pin 62 (XIN).

JUMPER DESCRIPTION:

BDS:

This jumper, when is closed, connects ATSAM3S4BA-AU pin 50 (JTAGSEL) to VCC.
The JTAGSEL pin is used to select the JTAG boundary scan when asserted at a high
level.
When this jumper is opened, normal mode is enabled.
Default state is opened.

TEST:

This jumper, when is closed, connects ATSAM3S4BA-AU pin 40 (TST) to VCC. The
TST pin is used for JTAG Boundary Scan Manufacturing Test or Fast Flash
programming mode.
When this jumper is opened, normal mode is enabled.
Default state is opened.

LED1:

This jumper, when is closed, connects GREEN led to ATSAM3S4BA-AU pin 10
(PA18/RD/PCK2/A14/AD1).
When this jumper is opened GREEN led is not connected.
Default state is closed.

LED2:

This jumper, when is closed, connects YELLOW led to ATSAM3S4BA-AU pin 9
(PA17/TD/PCK1/PWMH3/AD0).
When this jumper is opened YELLOW led is not connected.
Default state is closed.

Page 10

VREF_P:

This jumper, when is closed, ATSAM3S4BA-AU pin1 (ADVREF) is connected to VCC
(3.3V).
When this jumper is opened, ATSAM3S4BA-AU pin1 (ADVREF) is connected to
VREF pin.
Default state is closed.

RXD0/DRXD:

This jumper, when is in position RXD0, R0OUT is connected to ATSAM3S4BA-AU
pin 35 (PA5/RXD0), i.e. RS232_0/D is connected to RXD0.
When this jumper is in position DRXD, R0OUT is connected to ATSAM3S4BA-AU
pin 30 (PA9/URXD0), i.e. RS232_0/D is connected to DRXD. This is used in
programming mode via COM Port using SAM-BA tool.
Default state is RXD0 shorted.

TXD0/DTXD:

This jumper, when is in position TXD0, T0IN is connected to ATSAM3S4BA-AU pin
34 (PA6/TXD0), i.e. RS232_0/D is connected to TXD0.
When this jumper is in position DTXD, T0IN is connected to ATSAM3S4BA-AU pin
29 (PA10/UTXD0), i.e. RS232_0/D is connected to DTXD. This is used in programming
mode via COM Port using SAM-BA tool.
Default state is TXD0 shorted.

Page 11

Description for programming via RS232_0/D COM port, or USB port
using SAM-BA software:

Using SAM-BA software ATSAM3S4BA-AU can be programmed via COM port (with
external power supply only), or via USB port (with USB power supply only). Before being able to use
SAM-BA, a recovery procedure, which consists of copying the SAM-BA Boot Assistant into Flash must
be performed as follows:

1.Power down the ATSAM3S4BA-AU

2.Short ATSAM3S4BA-AU pin 55 (PB12/ERASE) with 3.3V (you may do this by
shorting R20)

3.Power up the ATSAM3S4BA-AU

4.Power down the ATSAM3S4BA-AU

5.Remove the short between ATSAM3S4BA-AU and 3.3V (R20)

6.Power up the ATSAM3S4BA-AU

Note: For programming via COM port, you must set jumpers RXD0/DRXD and TXD0/DTXD,
according to jumpers description above, and the USB should not be plugged in.

INPUT/OUTPUT:

Status Led (green) with name GREEN connected via jumper LED1 to
ATSAM3S4BA-AU pin 10 (PA18/RD/PCK2/A14/AD1)..

Status Led (yellow) with name YELLOW connected via jumper LED2 to
ATSAM3S4BA-AU pin 9 (PA17/TD/PCK1/PWMH3/AD0).

Power-on LED (red) with name PWR_LED – this LED shows that +3.3V is applied

to the board.

User button with name B1 connected to ATSAM3S4BA-AU pin 13
(PA19/RK/PWML0/A15/AD2/WKUP9).

User button with name B2 connected to ATSAM3S4BA-AU pin 16
(PA20/RF/PWML1/A16/AD3/WKUP10).

User button with name RESET connected to ATSAM3S4BA-AU pin 39 (NRST).

Trimpot with name AN_TR connected to ATSAM3S4BA-AU pin 3 (PB0/AD4).

Thermistor with name TH1 connected to ATSAM3S4BA-AU pin 4 (PB1/AD5).

Page 12

EXTERNAL CONNECTORS DESCRIPTION:

RS232_0/D:

Pin # Signal Name

1 NC

2 TX0OUT

3 RX0IN

4 NC

5 GND

6 NC

7 NC

8 NC

9 NC

RS232_1:

Pin # Signal Name

1 NC

2 TX1OUT

3 RX1IN

4 NC

5 GND

6 NC

7 NC

8 NC

9 NC

Page 13

PWR:

Pin # Signal Name

1 Power Input

2 GND

UEXT:

Pin # Signal Name

1 VCC

2 GND

3 TXD1

4 RXD1

5 TWCK

6 TWD

7 MISO

8 MOSI

9 SPCK

10 NPCS1

JTAG:

The JTAG connector allows the software debugger to talk via a JTAG (Joint Test Action
Group) port directly to the core. Instructions may be inserted and executed by the core thus allowing
ATSAM3S4BA-AU memory to be programmed with code and executed step by step by the host
software.

For more details refer to IEEE Standard 1149.1 – 1990 Standard Test Access Port and Boundary
Scan Architecture and ATSAM3S4BA-AU datasheets and users manual.

Page 14

Pin # Signal Name Pin # Signal Name

1 VCC 2 VCC

3 TRST 4 GND

5 TDI 6 GND

7 TMS 8 GND

9 TCK 10 GND

11 RTCK 12 GND

13 TDO 14 GND

15 RST 16 GND

17 NC 18 GND

19 NC 20 GND

USB:

Pin # Signal Name

1 +5V_USB

2 DDM

3 DDP

4 GND

Page 15

SD/MMC:

Pin # Signal Name Pin # Signal Name

1 NPCS0 2 MOSI

3 GND (VSS1) 4 VDD

5 SPCK 6 GND (VSS2)

7 MISO 8 Via R31 (47k) to 3.3V

9 Via R34 (47k) to 3.3V 10 WP

11 Via R26 (2k) to GND 12 Via R38 (2k) to GND

13 CP 14 Via R26 (2k) to GND

15 Via R38 (2k) to GND

Page 16

Prototype area:

NC – Not connected.

Page 17

MECHANICAL DIMENSIONS:

Page 18

AVAILABLE DEMO SOFTWARE:

The demo package available at the Software section of SAM3-P256's page
features the following examples:

 Getting started – demonstrates use of LEDs, User buttons, Interrupts and

Timers

 ADC demo – demonstrates use of analog peripherals on board

 SD card demo – demonstrates use of low level SD card routines

 USB demo – demonstrates use of USB device as a mouse

Page 19

ORDER CODE:

SAM3-P256 – assembled and tested board

How to order?

You can order directly from our web ship or purchase from any of our distributors.
The list of Olimex distributors might be found here:

https://www.olimex.com/Distributors

Check our web site https://www.olimex.com/ for more info.

Revision history:

Board's Revision: Rev. Initial, July 2010

Manual's Revision Rev. A, released May 2011

Rev. B, released March 2013

Rev. C, released September 2014

Page 20

DISCLAIMER

© 2013 Olimex Ltd. Olimex®, logo and combinations thereof, are registered trademarks of Olimex Ltd.
Other product names may be trademarks of others and the rights belong to their respective owners.

The information in this document is provided in connection with Olimex products. No license,
express or implied or otherwise, to any intellectual property right is granted by this document or in
connection with the sale of Olimex products.

The Hardware project is released under the Creative Commons Attribution-Share Alike 3.0 United
States License. You may reproduce it for both your own personal use, and for commercial use. You
will have to provide a link to the original creator of the project https://www.olimex.com on any
documentation or website.
You may also modify the files, but you must then release them as well under the same terms. Credit
can be attributed through a link to the creator website: https://www.olimex.com

The software is released under GPL.

It is possible that the pictures in this manual differ from the latest revision of the board.

The product described in this document is subject to continuous development and improvements. All
particulars of the product and its use contained in this document are given by OLIMEX in good faith.
However all warranties implied or expressed including but not limited to implied warranties of
merchantability or fitness for purpose are excluded. This document is intended only to assist the
reader in the use of the product. OLIMEX Ltd. shall not be liable for any loss or damage arising from
the use of any information in this document or any error or omission in such information or any
incorrect use of the product.

This evaluation board/kit is intended for use for engineering development, demonstration, or
evaluation purposes only and is not considered by OLIMEX to be a finished end-product fit for
general consumer use. Persons handling the product must have electronics training and observe good
engineering practice standards. As such, the goods being provided are not intended to be complete in
terms of required design-, marketing-, and/or manufacturing-related protective considerations,
including product safety and environmental measures typically found in end products that
incorporate such semiconductor components or circuit boards.

Olimex currently deals with a variety of customers for products, and therefore our arrangement with
the user is not exclusive. Olimex assumes no liability for applications assistance, customer product
design, software performance, or infringement of patents or services described herein.

THERE IS NO WARRANTY FOR THE DESIGN MATERIALS AND THE COMPONENTS USED
TO CREATE SAM3-P256. THEY ARE CONSIDERED SUITABLE ONLY FOR SAM3-P256.

Page 21