EMAC SoM-A5D36 Bedienungsanleitung

SoM-A5D36

User Manual

April 2019

Revision 1.30

EMAC, Inc.

2390 EMAC Way, Carbondale, Illinois 62902

Phone: (618) 529-4525 Fax: (618) 457-0110

http://www.emacinc.com

 SoM-A5D36 User Manual
Revision 1.30 © 2015 - 1 - 
Table of Contents 
1Introduction........................................................................................................................................................... - 4 - 
1....Features............................................................................................................................................................................. - 4 -
2Hardware ................................................................................................................................................................ - 5 - 
1....Specifications .................................................................................................................................................................. - 5 -
2....Real-Time Clock.............................................................................................................................................................. - 7 -
3....Watchdog Timer............................................................................................................................................................ - 7 -
4....External Connections ................................................................................................................................................... - 7 -
4.1External Bus ..............................................................................................................................................................................- 8 -
4.2JTAG .............................................................................................................................................................................................- 9 -
4.3One-Wire / I2C .........................................................................................................................................................................- 9 -
4.4Ethernet................................................................................................................................................................................... - 10 -
4.5USB............................................................................................................................................................................................ - 11 -
4.6SPI.............................................................................................................................................................................................. - 12 -
4.7MCI Multimedia Card ......................................................................................................................................................... - 13 -
4.8Serial Ports.............................................................................................................................................................................. - 14 -
4.9I2S.............................................................................................................................................................................................. - 15 -
4.10 CAN.................................................................................................................................................................................... - 15 -
4.11 GPIO.................................................................................................................................................................................. - 16 -
4.12 Interrupts......................................................................................................................................................................... - 17 -
4.13 ADC .................................................................................................................................................................................... - 17 -
4.14 Timer/Counters ............................................................................................................................................................. - 18 -
4.15 SoM Status LED.............................................................................................................................................................. - 18 -
4.16 LCD..................................................................................................................................................................................... - 19 -
4.17 Additional Interfaces................................................................................................................................................. - 20 -
5....Power Connections.....................................................................................................................................................- 21 -
6....Boot Options..................................................................................................................................................................- 21 -
7....Serial Data Flash..........................................................................................................................................................- 22 -
3Design Considerations......................................................................................................................................- 22 - 
1....Off-the-Shelf Carriers.................................................................................................................................................- 22 -
1.1SoM-200GS............................................................................................................................................................................. - 22 -
1.2SoM-250GS............................................................................................................................................................................. - 23 -

 SoM-A5D36 User Manual
Revision 1.30 © 2015 - 2 - 
2....Semi-Custom Carriers ..............................................................................................................................................- 23 -
3....Designing Your Own Carrier.................................................................................................................................- 23 -
3.1Power ...................................................................................................................................................................................... - 23 -
3.2Analog Reference ............................................................................................................................................................... - 24 -
3.3Battery Backup.................................................................................................................................................................... - 24 -
3.4Shutdown Logic Pins ........................................................................................................................................................ - 24 -
4Software................................................................................................................................................................- 25 - 
1....Das U-Boot.....................................................................................................................................................................- 25 -
2....Embedded Linux...........................................................................................................................................................- 25 -
2.1Linux with Xenomai Real Time Extensions.................................................................................................................. - 25 -
2.2Linux Packages ...................................................................................................................................................................... - 26 -
2.3Linux Patches......................................................................................................................................................................... - 26 -
3....Qt Creator.......................................................................................................................................................................- 26 -
4....ARM EABI Cross Compiler...................................................................................................................................- 26 -

SoM-A5D36 User Manual

Disclaimer

EMAC Inc. does not assume any liability arising out of the application or use of any of its products

or designs. Products designed or distributed by EMAC Inc. are not intended for, or authorized to

be used in, applications such as life support systems or for any other use in which the failure of

the product could potentially result in personal injury, death or property damage.

If EMAC Inc. products are used in any of the aforementioned unintended or unauthorized

applications, Purchaser shall indemnify and hold EMAC Inc. and its employees and officers

harmless against all claims, costs, damages, expenses, and attorney fees that may directly or

indirectly arise out of any claim of personal injury, death or property damage associated with

such unintended or unauthorized use, even if it is alleged that EMAC Inc. was negligent in the

design or manufacture of the product.

EMAC Inc. reserves the right to make changes to any products with the intent to improve overall

quality, without further notification.

SoM-A5D36 User Manual

1Introduction

This document describes EMAC’s SoM-A5D36 System on Module (SoMs). The SoM-A5D36 is a System on

Module, designed to be compatible with EMAC’s 200-pin SODIMM form factor. This module is built

around the ATSAMA5D36 ARM based microcontrollers, which provides several of its key features.

The SoM-A5D36 has an onboard Gigabit Ethernet PHY, 6 serial ports, an RTC, onboard eMMC flash, Serial

NOR Flash, and SDRAM. In addition to the standard SoM features, the SoM-A5D36 also features a fast

32-bit core, open source software support, and a wide range of controller I/O pins.

1.1 Features

▪Small, 200 pin SODIMM form factor (2.66" x 2.384")

▪Atmel ARM Cortex-A5 ATSAMA5D36 536MHz Processor

▪10/100/1000 BaseT Ethernet with on-board PHY

▪RMII Interface for additional 10/100 BaseT PHY

▪6 Serial ports, one with full handshake and 3 with RTS/CTS handshake

▪2 USB 2.0 (High Speed) Host port

▪1 USB 2.0 (High Speed) OTG Host/Device port

▪Up to 512 MB of LPDDR2 SDRAM

▪4 GB of eMMC Flash

▪16 MB of NOR Serial Flash

▪2 SD/MMC Flash Card Interfaces

▪Battery-backed Real-Time Clock

▪2 SPI ports

▪2 I2C ports

▪1 I2S Audio port

▪2 CAN ports

▪6-Channel 12-bit Analog-to-Digital converter with 4-wire Touchscreen Interface

▪Image Sensor Interface (ISI), ITU-R BT. 601/656

▪Timer/Counters and Pulse Width Modulation (PWM) ports

▪Graphic LCD Interface with 2D acceleration with 2048x2048 Resolution or up to 720p

▪32-bit True Random Number Generator

▪Typical power requirement less than 1 Watt

▪JTAG for debug, including real-time trace

▪FREE Qt Creator IDE with GCC & GDB development tools

SoM-A5D36 User Manual

2Hardware

2.1 Specifications

▪CPU: Embedded Atmel ATSAMA5D36 processor running at 536MHz

▪Flash: 4GB eMMC Flash and 16MB of Serial Data Flash.

▪RAM: 512 MB 133 MHz LPDDR2.

▪Flash Disk: 4-bit SDHC/MMC interface.

▪System Reset: Supervisor with external Reset Button provision.

▪RTC: Real-Time Clock/Calendar with battery-backed provision using 32-bit free-running counter.

▪Timer/Counters: 5, 2-channel, 32-bit timers/counters with capture, compare, and PWM.

▪PWM: 4 PWM channels, one with complimentary outputs.

▪Watchdog Timer: External Watchdog Timer (MAX6747).

▪Digital I/O: 32 General Purpose I/Os with 16 mA drive when used as an output

▪Analog I/O: 6-channel, 12-bit Analog-to-Digital converter (ADC)

▪Power: Power Management Controller allows selectively shutting down on-processor I/O

functionality and running from a slow clock.

▪JTAG: JTAG for debug, including real-time trace.

▪CLOCKS: PLL synthesized 8MHz, 200KHz, 14.3MHz clock outputs

Serial Interfaces

▪UARTS: 6 serial TTL level serial ports with Auto RS485 and most with handshaking

(each UART requires external RS level shifting).

▪SPI: 2 High-Speed SPI ports with Chip Selects.

▪Audio: I2S Synchronous Serial Controller with analog interface support

▪USB: Dual USB 2.0 High Speed Host and single USB 2.0 High Speed Device ports

▪I2C: Two I2C ports

SoM-A5D36 User Manual

Ethernet Interface

▪MAC: ATSAMA5D36 on chip MAC

▪PHY: Micrel KSZ9031 Gigabit PHY with software shutdown.

▪Interface: IEEE 802.3u 10/100/1000 BaseT Fast Ethernet (requires external magnetics and Jack)

Bus Interface:

▪Local Bus accessible through SODIMM provides 22 address lines, 16 data bus lines, and control

lines.

Mechanical and Environmental

▪Dimensions: SODIMM form factor with the length dimension extended (2.66" x 2.384")

▪SODIMM TYPE: 200 Pin DDR1 (not compatible with DDR2)

▪Power Supply Voltage: +3.3 Volts DC +/- 5%

▪Power Requirements (Typical):

▪3.3 Volts @ 300 mA (less than 1 watt)

▪Max current draw during boot process: 340 mA

▪Constant busy loop: 260 mA

▪Idle system: 245 mA

▪Idle system with Ethernet PHY disabled: TBD

▪Operating Temperature: -40 to 85° C (-40 to 185 ° F), fanless operation

▪Operating Humidity: 0% to 90% relative humidity, non-condensing

SoM-A5D36 User Manual

2.2 Real-Time Clock

The SoM-A5D36 has an embedded Real-time Clock. Battery backup is provided from the carrier board

using the VSTBY pin. The SoM-A5D36 will retain the RTT value register during reset and hence use it as an

RTC. The RTC has the provision to set alarms that can interrupt the processor. For example, the processor

can be placed in sleep mode and then later awakened using the alarm function.

2.3 Watchdog Timer

The SoM-A5D36 provides an external Watchdog Timer/ Supervisor (MAX6747) with an extended

watchdog timeout period of 1.42 seconds (±10%). Upon power-up the Watchdog is disabled and does not

require pulsing. To start the Watchdog, it must first be enabled. This is done by configuring port line PD8

as an output and setting it low in software. Once enabled, the Watchdog should be pulsed, using port line

PD6, continually every 1.28 seconds or faster to prevent the Watchdog from timing out and resetting the

module. If you are using the watchdog to force a system reset, you may need up to 1.56 seconds of

inactivity before the Watchdog reset will occur. The watchdog is automatically disabled upon reset but it

can also be disabled by setting PD8 high.

2.4 External Connections

The SoM-A5D36 connects to a carrier board containing its connectors, power supply and any expansion

IO, through a standard ENIG-plated (Electroless Nickel Immersion Gold) SODIMM 200-pin connection

shown below.

The SoM model will fit in any standard 200-pin SODIMM socket. These connections are designed to be

compatible with all EMAC 200-pin SoM products. See EMAC SoM 200-pin SODIMM Pinout Specification

to see how other 200-pin SoM pinouts line up with the SoM-A5D36’s pinout.

The use of the DDR SODIMM form-factor for EMAC’s SoMs is a sound choice that has been proven rugged

and reliable in the laptop and embedded SBC markets.

The remainder of this section describes the pinout as it applies specifically to the SoM-A5D36 processor.

SoM-A5D36 User Manual

2.4.1 External Bus

The SoM-A5D36 provides a flexible external bus for connecting peripherals. The CPLD of the SoM-200GS

and SoM-250GS connect through a subset of these connections. The WKUP pin has a Maximum input

voltage of 3.3V (pulled up on-module to 3.3V) and Shutdown has a maximum output voltage of 3.3V. The

Flash WP for the Serial Flash is active-low and pulled up on-module.

Table 1: External Bus Interface

SODIMM

Pin#

SoM

Pin Name

Processor

Pin Name(s)

Port Line

Description

145

GP_CSA

NCS1

PE27

General Purpose Chip Select CS0

146

GP_CSB

NCS2

PE28

General Purpose Chip Select CS4

147

GP_CSC

NCS3

N/A

General Purpose Chip Select CS2

148

GP_CSD/Shutdown

PWRDN

N/A

Processor Shutdown Output

149

NWE

N/A

Write Signal

150

NRD

N/A

Read Signal

151

RST_IN

NRST

Processor Reset

152

RST_OUT

~RST_OUT

Processor Reset

153

WAIT

NWAIT

PE30

Shutdown Control

154

~FLASH WP

Serial Flash Write Protect

WAKEUP

WKUP

N/A

Processor Wakeup Input

157

BOOT_OPTION0

BMS

N/A

Boot0 Option Select

158

BOOT_OPTION1

Boot1 Option Select

175-193

A0 –A18

PE0-PE18

Address Bus

194

A19

PE19

Address Bus line A19

195

A20

PE20

Address Bus line A20

196

A21

PE21

Address Bus line A23

159-174

D0 - D15

D0 –D15

N/A

Data Bus

*The RST_IN pin is an active low input that drives the processor reset pin. The RST_OUT pin is an active

low output that is driven low by either the watchdog timer or a software reset. The ~FLASH_WP pin is an

active low input that prevents the serial NOR flash from being written to. The BOOT_OPTION1 pin is an

input that disables the serial NOR flash.

SoM-A5D36 User Manual

2.4.2 JTAG

The SoM specification allows for access to the JTAG lines for the ATSAMA5D36 processor. These

connections will allow the Flash to be programmed in circuit via a program running from the processor

and also the capability to debug software.

Table 2: Processor JTAG

SODIMM

Pin#

SoM

Pin Name

Processor

Pin Name(s)

Description

139

JTAG_TCK

JTAG Clock

140

JTAG_TDI

JTAG Serial In

141

JTAG_TDO

JTAG Serial Out

142

JTAG_TMS

JTAG Operation Mode

143

JTAG_TRST

Test Reset Signal

144

JTAG_RTCK

Dynamic Clock Sync

2.4.3 One-Wire / I2C

The SoM-200 specification calls for a two-wire I2C port. The SoM-A5D36 does not have a native hardware

One-Wire port but does provide general purpose lines that can be used in this capacity when “bit-banged”.

Both Linux and CE provide this functionality.

Table 3: One-Wire / I2C Port

SODIMM

Pin#

SoM

Pin Name

Processor

Pin Name(s)

Port Line

Description

I2CCLK

TWCK0

PA31

Clock Pin

I2CDATA

TWD0

PA30

Data Pin

There is an additional available I2C interface that is shared with the USB OTG pins. This additional port

can be utilized on a custom carrier board.

Table 4: Additional I2C Port

SODIMM

Pin#

SoM

Pin Name

Processor

Pin Name(s)

Port Line

Description

USB_OTG_VBUS

TWCK1

PC27

Clock Pin

USB_OTG_ID

TWD1

PC26

Data Pin

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