Digi CCIMX28 User Manual

ConnectCore™ for i.MX28™ Hardware Reference

90002181_C 4/24/2013

Digi, Digi International, the Digi logo, a Digi International Company, Digi JumpStart Kit, ConnectCore, NET+, NET+OS, NET+Works, and XBee are trademarks or registered trademarks of Digi International, Inc. in the United States and other countries worldwide. All other trademarks are the property of their respective owners.

All other trademarks mentioned in this document are the property of their respective owners.

Information in this document is subject to change without notice and does not represent a commitment on the part of Digi International.

Digi provides this document “as is,” without warranty of any kind, either expressed or implied, including, but not limited to, the implied warranties of fitness or merchantability for a particular purpose. Digi may make improvements and/or changes in this manual or in the product(s) and/or the program(s) described in this manual at any time.

This product could include technical inaccuracies or typographical errors. Changes are periodically made to the information herein; these changes may be incorporated in new editions of the publication.

Contents

Chapter 1: ConnectCard for i.MX28 Features and Functionality12

i.MX28 Features and Functionality......................................... 13

Block Diagram ................................................................. 14

CPU - Freescale i.MX28X ................................................... 14

ConnectCard for i.MX28 .................................................... 15

Module Pinout ................................................................. 16

52-Pin PCle Edge Connector ............................................... 16

Pinout ......................................................................... 16

Available Features............................................................ 19

Available Features - i.MX280 and i.MX287 ...............................19

Thermal Considerations ..................................................... 20

31 Pin LCD, JTAG, and ETM Connector.................................... 20

Standard 18 Bit Color Pinout .............................................. 21

24 bit Color Pinout (without JTAG) ....................................... 22

Module Operation ........................................................... 23

DC Power ..................................................................... 23

Thermal Considerations ....................................................23

System Boot .................................................................. 23

Audio System ................................................................. 24

LCD System ...................................................................24

GPIO ........................................................................... 24

Interfaces ..................................................................... 25

Chapter 2: About the Development Board ..................... 30

What’s on the Development Board? ....................................... 30

The Development Board ....................................................32

Development Board Set Up.................................................. 36

Power Supplies ...............................................................36

Power over Ethernet (PoE) - IEEE802.3af ................................37

The PoE Module ..............................................................38

PoE Connector (power in), P28 ............................................ 39

PoE Connector (power out), P33 .......................................... 39

Connector, Switch, and Jumper Locations ............................... 40

Power Functions and Settings .............................................41

Boot Mode ..................................................................... 41

Switch Location ............................................................... 42

Function and Settings .......................................................43

Development Board Button Functions ..................................... 43

XBEE RESET BUTTON and XBEE COMM BUTTON ......................... 43

Contents

USER BUTTON1 and USER BUTTON2 ...................................... 43

CCi.MX28 RESET BUTTON .................................................. 43

CCi.MX28 POWER BUTTON .................................................43

CCi.MX28 RECOVERY BUTTON ............................................. 43

Button Locations.............................................................. 44

DUART (Console) and I2C0 .................................................. 45

Connector and Switch Locations ..........................................45

Functions and Settings ..................................................... 46

AUART1, ENET0, LRADC4, LRADC5, and User LEDs ...................... 46

AUART1 ....................................................................... 46

ENET0 .........................................................................46

LRADC4 & LRADC5 ........................................................... 46

User LEDs ..................................................................... 46

Connector and Switch Locations ..........................................47

Function and Settings .......................................................47

AUART4, SSP3, I2S (Audio), LRADC6, and XBee .......................... 49

AUART4 ....................................................................... 49

SSP3 ........................................................................... 49

I2S (Audio) .................................................................... 49

LRADC6 ........................................................................ 49

XBee ........................................................................... 49

Connector and Switch Locations ..........................................50

Function and Settings Table - AUART4 ................................... 51

Function and Settings Table - SSP3 ....................................... 51

Function and Settings Table - I2S .........................................52

Function and Settings Table - XBee ...................................... 53

Function and Settings Table - LRADC6 ................................... 53

AUART2 (TTL), AUART3 (TTL), CAN1, ETHERNET (ENET1), and USB Host (USB1) 55

AUART2 (TTL) ................................................................55

AUART3 ....................................................................... 55

CAN1 ...........................................................................55

ETHERNET .................................................................... 55

USB HOST (USB1) ............................................................55

Connector, Switch, and Jumper Locations .............................. 56

Function and Settings Table - AUART3 ................................... 57

Function and Settings Table - CAN1 ......................................57

Function and Settings Table - ENET1 ..................................... 57

Function and Settings Table - USB1 ...................................... 58

SD CARD, SSP1, LRADC0, LRADC1, LRADC2, and LRADC3 ............... 59

SD CARD ....................................................................... 59

Contents

SSP1 ........................................................................... 59

LRADC0, LRADC1, LRADC2 and LRADC3 ..................................59

Connector, Switch, and Jumper Locations .............................. 59

Function and Settings Table - SSP1 ....................................... 60

Function and Settings Table - LRADC0-3 .................................60

CAN0, HSADC, AND1-Wire ................................................... 61

CAN0 ...........................................................................61

HSADC ......................................................................... 61

1-Wire ......................................................................... 61

Connector, Switch, and Jumper Locations .............................. 62

Function and Settings Table ..............................................62

LCD, ETM, JTAG, USB OTG (USB0) ......................................... 63

Connector and Jumper Locations .........................................63

Functions and Settings ..................................................... 63

Chapter 3: Certifications................................................ 65

Agency Certifications ........................................................ 65

United States FCC ...........................................................65

FCC-Approved Antennas .................................................... 66

Antennas Approved for Use with the ConnectCard™ for i.MX28 Wi-Fi Modules 67

RF Exposure ..................................................................67

Europe (ETSI) .................................................................. 67

OEM Lebeling Requirements ...............................................68

Restrictions ................................................................... 68

Canada (IC) .................................................................... 69

Labeling Requirements ..................................................... 69

Transmitters with Detachable Antennas .................................69

Detachable Antenna ........................................................ 70

Australia (C-Tick) ............................................................. 70

Appendix A: Module Specifications ....... 71

Mechanical Specifications ................................................... 71

Dimensional Drawing ........................................................ 71

Environmental Specifications .............................................. 71

Network Interface ............................................................ 72

Digi part number A24-HASM-450 ..........................................72

Digi part number 29000146 ................................................ 73

Taoglas PC.11.07.0100A ...................................................74

Taoglas FXP.830.07.0100C ................................................76

Ethernet 2 .................................................................... 78

Contents

WLAN .......................................................................... 78

5GHz HT20 AND HT40 Channels Available ...............................81

Receive Sensitivity .......................................................... 82

Electrical Characteristics.................................................... 82

Absolute Maximum Ratings ................................................82

Voltage Supplies .............................................................83

Supply Current ...............................................................83

Transmit Power .............................................................. 83

GPIO DC Parameters ........................................................ 83

Agency Approvals ............................................................. 84

Appendix B: Module Dimensions ........... 85

................................................................................. 85

Appendix C: Change Log ..................... 86

Revision 0.1.................................................................... 86

Using this Guide

This guide provides information about the Digi ConnectCore™ for i.MX28 embedded core module family.

Conventions used in this guide

This table describes the typographic conventions used in this guide:

This convention Is used for

italic type Emphasis, new terms, variables, and document titles.

monospaced type

Digi Information

Document Updates

Please always check the product specific section on the Digi support website at

www.digiembedded.com/support for the most current revision of this document.

Contact Information

For more information about your Digi products, or for customer service and technical support, contact Digi International.

Mail Digi International

Internet http://www.digiembedded.com/support/

Filenames, pathnames, and code examples.

To contact Digi International by Use

1101 Bren Road East

Minnetonka, MN 55343

U.S.A.

Telephone (U.S.) (952) 912-3444 or (877) 912-3444

Telephone (other locations) +1 (952) 912-3444 or (877) 912-3444

Additional Resources

Please also refer to the most recent Freescale® i.MX28 Application Processor Reference Manual and related documentation (available on the Freescale web site) for additional information.

ConnectCard for i.MX28 Features and Functionality

CHAPTER 1

The ConnectCard™ for i.MX28 is a cost-effective, small-footprint wireless embedded

module solution that is designed for connected devices in healthcare and other markets.

The module is based on the Freescale® i.MX28 processor family with a high-performance ARM 9 core, multimedia options, and a complete set of peripherals.

Combined with a Qualcom-Atheros 802.11 and Bluetooth module featuring data rates up to 150Mbps the ConnectCard for i.MX28 is capable of communicating with a vast number of peripheral devices over many different networks.

The module combines the fast integration, reliability and design flexibility of an off-theshelf System-on Module (SOM) with complete out-of-the-box software development support for platforms such as Digi® Embedded Linux ®and Timesys® LinuxLink®.

Complete and cost-efficient Digi Jump Start Kits™ Linux allows immediate and professional embedded product development with dramatically reduced design risk and time-to-market.

ConnectCore™ for i.MX28™ Hardware Reference

i.MX28 Features and Functionality

The ConnectCard for i.MX28 module is based on the i.MX28 processor series from Freescale. This processor offers a high number of interfaces. Most of these interfaces are multiplexed and are not available simultaneously. Not all features are available on all variations of the module. More in-depth information can be found in the "i.MX28 Application Processor Reference Manual" on the Freescale web site. The i.MX28 processor uses an ARM 926 core with on-chip RISC (Reduced Instruction Set Computer).

The ConnectCard for i.MX28 module has the following i.MX28 features:

LRADC (Low Resolution ADC)

HSADC (High Speed ADC)

GPIO (General Purpose Input Output)

SD/SDIO/MMC (Secure Digital/ Secure Digital Input Output/ Multi-Media Card)

UART (Universal Asynchronous Receiver/Transmitter)

DUART (Debug Universal Asynchronous Receiver/Transmitter)

SPI (Serial Peripheral Interface)

I2C (Inter-Integrated Circuit)

CAN (Controller Area Network)

USB OTG (Universal Serial Bus On-the-Go)

USB Host (Universal Serial Bus)

ENET (Ethernet)

SAIF (Serial Audio Interface)

PWM (Pulse Width Modulator)

LCD (Liquid Crystal Display)

ETM (Embedded Trace Macrocell)

JTAG (Joint Test Action Group)

802.11 abgn and Bluetooth

Flash Memory

DDR2 Memory

One-Wire Interface

Power supply options - Battery and DC

ConnectCore™ for i.MX28™ Hardware Reference

Block Diagram

The following figures show the block diagram of the Freescale i.MX285 CPU and the block diagram of the ConnectCore for i.MX28 module.

CPU - Freescale i.MX28X

ConnectCore™ for i.MX28™ Hardware Reference

ConnectCard for i.MX28

ConnectCore™ for i.MX28™ Hardware Reference

Module Pinout

The module has 2 connectors. The 52 pin PCIe edge connector, and the 31 pin LCD connector.

52-Pin PCle Edge Connector

The top side of the module has the shield on it and the bottom side of the module has the i.MX28X on it. Pin numbering is shown below:

Pinout

Pin Pin Name Avail. on

i.MX287

1 ENET0_TX+ X X

3 ENET0_TX- X X

5 GND X X

7 AUART4_CTS X X SAIF0_MCLK PWM_3 AUART4_CTS GPIO3_20

X SSP3_SS0 AUART4_CTS ENET1_1588_EVENT1

9 AUART4_RTS X X SAIF0_LRCLK PWM4 AUART4_RST GPIO3_21

X SSP3_MOSI AUART4_RX ENET1_1588_EVENT0

11 AUART4_RX X X SAIF0_BITCLK PWM_5 AUART4_RX GPIO3_22

X SSP3_MISO AUART4_RTS ENET1_1588_EVENT1

13 AUART4_TX X X SAIF0_SDAT0 PWM_6 AUART4_TX GPIO3_23

X SSP3_SCK AUART4_TX ENET1_1588_EVENT0

Avail. on i.MX280

Mux 0 Mux 1 Mux 2 Mux 3

GPIO3_27

_IN

GPIO3_25

_IN

GPIO3_26

_OUT

GPIO3_24

_OUT

ConnectCore™ for i.MX28™ Hardware Reference

Pin Pin Name Avail. on

i.MX287

15 Pswitch X X

GAP

17 USB0_DM X X

19 USB0_DP X X

21 USB0_ID X X PWM_2 USB0_ID USB1

23 Battery X X

25 HSADC0 X X HSADC0

27 CAN0_RX X GPMI_READY3 CAN0_RX HSADC_TRIGGER GPIO0_23

29 CAN0_TX X GPMI_READY2 CAN0_TX ENET0_TX_ER GPIO0_22

31 SSP1_SS X SSP1_SS SSP2_D7 ENET0_1588_EVENT3

X X LRADC0

33 SSP1_MOSI X SSP1_MOSI SSP2_D2 ENET0_1588_EVENT2

X X LRADC1

Avail. on i.MX280

Mux 0 Mux 1 Mux 2 Mux 3

GPIO3_18

_OVERCURRENT

GPIO2_15

_IN

GPIO2_13

_IN

35 SSP1_MISO X SSP1_MISO SSP2_D6 ENET0_1588_EVENT3

_OUT

X X LRADC2

37 SSP1_SCK X SSP1_SCK SSP2_D1 ENET0_1588_EVENT2

_OUT

X X LRADC3

39 AUART1_CTS X AUART1_CTS USB0

_OVERCURRENT

X X LRADC4

41 AUART1_RTS X AUART1_RTS USB0_ID TIMROT_ROTARYA GPIO3_7

X X LRADC5

43 AUART1_TX X X AUART1_TX SSP3_CARD

_DETECT

45 AUART1_RX X X AUART1_RX SSP2_CARD

_DETECT

47 GND X X

49 ENET1_TX+ X

51 ENET1_TX- X

TIMROT_ROTARYA GPIO3_6

PWM1 GPIO3_5

PWM0 GPIO3_4

GPIO2_14

GPIO2_12

2 ENET0_RX+ X X

ConnectCore™ for i.MX28™ Hardware Reference

Pin Pin Name Avail. on

i.MX287

4 ENET0_RX- X X

6 VDD_5V X X

8 I2C1_SCL X X PWM0 I2C1_SCL DUART_RX GPIO3_17

10 I2C1_SDA X X PWM1 I2C1_SDA DUART_TX GPIO3_16

12 DUART_RX X X I2C0_SCL TIMROT_ROTARYA DUART_RX GPIO3_24

14 DUART_TX X X I2C0_SDA TIMROT_ROTARYB DUART_TX GPIO3_25

16 RESET X X

GAP

18 SSP0_CMD X X SSP0_CMD GPIO2_8

20 SSP0_DATA0 X X SSP0_DATA0 GPIO2_0

22 SSP0_DATA1 X X SSP0_DATA1 GPIO2_1

X AUART3_CTS CAN1_TX ENET0_1588_EVENT1

24 SSP0_DATA2 X X SSP0_DATA2 GPIO2_2

X AUART3_RTS CAN1_RX ENET0_1588_EVENT1

Avail. on i.MX280

Mux 0 Mux 1 Mux 2 Mux 3

GPIO3_14

_OUT

GPIO3_15

_IN

26 SSP0_DATA3 X X SSP0_DATA3 GPIO2_3

28 SSP0_SCLK X X SSP0_SCK GPIO2_10

30 SSP0_CARD

_DETECT

32 LRADC6 /

SAIF1_DATA0

34 i.MX28 3.3V

Output

36 AUART2_CTS X AUART2_CTS I2C1_SCL SAIF1_BITCLK GPIO3_10

One-Wire X X

38 AUART2_RTS X AUART2_RTS I2C1_SDA SAIF1_LRCLK GPIO3_11

40 AUART2_RX X AUART2_RX SSP2_D2 SSP3_D5 GPIO3_8

42 AUART2_TX X AUART2_TX SSP3_D1 SSP3_D4 GPIO3_9

44 CAN1_RX X GPMI_CE3N CAN1_RX SAIF1_MCLK GPIO0_19

X X SSP0_CARD

_DETECT

X X LRADC6

X X LCD_VSYNC SAIF1_DATA0 GPIO_1_28

X X

X AUART3_RX CAN0_TX ENET0_1588_EVENT0

_OUT

GPIO2_9

GPIO3_13

ConnectCore™ for i.MX28™ Hardware Reference

Pin Pin Name Avail. on

i.MX287

46 CAN1_TX X GPMI_CE2N CAN1_TX ENET0_RX_ER GPIO0_18

X AUART3_TX CAN0_RX ENET0_1588_EVENT0

48 VDD_5V X X

50 ENET1_RX+ X

USB1_DM X USB1_DM

52 ENET1_RX- X

USB1_DP X USB1_DP

Avail. on i.MX280

Mux 0 Mux 1 Mux 2 Mux 3

GPIO3_12

_IN

Available Features

Standard variants are available with either the i.MX280 or i.MX287. Not all features are available on all variants. For custom variants see your Digi International sales person.

Available Features - i.MX280 and i.MX287

Function i.MX280 i.MX287

LCD Interface - Yes

Touch Screen - Yes

Ethernet x1 x2

L2 Switch - Yes

CAN - x2

12-bit ADC x8 x8

High-speed ADC x1 x1

USB 2.0 OTG HS with HS

PHY x1

HS Host with HS

PHY x1

SDIO x4 x4

SPI x4 x4

Application UART x6 x5

Debug UART x1 x1

PWM - x8

S/PDIF Tx - Yes

OTG HS with HS

PHY x1

HS Host with HS

PHY x1

Security Yes Yes

ConnectCore™ for i.MX28™ Hardware Reference

Thermal Considerations

Heat dissipation of the i.MX28 processor is highly dependent on the selected clock speed and the peripherals it is supporting. Freescale specifies the maximum allowed junction temperature of the processor to be limited to 105C, which translates to the following processor case temperatures:

Processor Speed Max Ambient Temperature w/o

Thermal Pad

454 MHz 59 C 84 C

360 MHz 68 C 88 C

261 MHz 69 C 88 C

64 MHz 99 C 102 C

Max Case Temperature

The ConnectCard for i.MX28 has been built to function up to 65C at full clock speed without a thermal pad attached (not included in the development kit) between the processor and the development board, and has been checked up to 75C with the thermal pad attached. There is a large ground area left open under the module on the development board under the module to accommodate the thermal pad. Bergquist makes thermal pad material in various thicknesses. The CCi.MX28 has been characterized using a combination of 2500S20 and 2000S40 pads from Bergquist.

Designs using the ConnectCard for i.MX28 need to ensure that the rating maximums above are not exceeded in the application. Case temperature can be measured using an external probe on the center of the i.MX28 processor package, and the junction temperature can be monitored in software through an on-die temperature sensor provided in the i.MX processor.

Because of the limitation above, active and/or passive thermal management may be required (thermal pad, airflow, clocking, etc.) like the Bergquist 2500s20 and 2000S40 thermal pads.

For more information on thermal consideration with the i.MX28 processor see the Freescale i.MX28 data sheet.

31 Pin LCD, JTAG, and ETM Connector

The module uses a 31 pin ZIF connector for the LCD, JTAG and ETM connections. These pins can also be used for GPIO functions. A list of possible connectors is shown below, the list is not all inclusive:

Manufacturer Part Number

FCI SFV31R-1STE1HLF

FCI SFV31R-1STE1LF

TYCO ELECTRONICS 3-1734839-1

The standard connection is 18 bit color, and the CC-WMX-PF58-TK-JT comes with this option.

ConnectCore™ for i.MX28™ Hardware Reference

Standard 18 Bit Color Pinout

Pin Pin Name i.MX28 Mux 0 Mux 1 Mux 2 Mux 3

1 LCD_DOTCLK N1 LCD_DOTCLK SAIF1_MCLK ETM_TCLK GPIO1_30

2 LCD_VSYNC M6 LCD_RESET LCD_VSYNC LCD_RESET /

LCD_VSYNC

3 LCD_HSYNC M1 LCD_HSYNC SAIF1_SDATA1 EMT_TCTL GPIO1_29

4 LCD_ENABLE N5 LCD_ENABLE LCD_ENABLE GPIO1_25

5 LCD_WR_RWN /

ETM_TCLK

6 LCD_D17 R3 LCD_D17 ETM_DA6 GPIO1_17

7 LCD_D16 T3 LCD_D16 ETM_DA16 GPIO1_16

8 LCD_D15 / ETM_DA15 U3 LCD_D15 ETM_DA15 GPIO1_15

9 LCD_D14 / ETM_DA14 U2 LCD_D14 ETM_DA14 GPIO1_14

10 LCD_D13 / ETM_DA13 T2 LCD_D13 ETM_DA13 GPIO1_13

11 LCD_D12 / ETM_DA12 T1 LCD_D12 ETM_DA12 GPIO1_12

12 LCD_D11 / ETM_DA11 R2 LCD_D11 ETM_DA11 GPIO1_11

13 LCD_D10 / ETM_DA10 R1 LCD_D10 ETM_DA10 GPIO1_10

14 LCD_D09 / ETM_DA9 P3 LCD_D09 ETM_DA4 ETM_DA9 GPIO1_0

15 LCD_D08 / ETM_DA8 P2 LCD_D08 ETM_DA3 ETM_DA8 GPIO1_8

16 LCD_D07 / ETM_DA7 P1 LCD_D07 ETM_DA7 GPIO1_7

K1 LCD_WR_RWN LCD_HSYNC ETM_TCLK GPIO1_32

GPIO3_31

17 LCD_D06 / ETM_DA6 N2 LCD_D06 ETM_DA6 GPIO1-6

18 LCD_D05 / ETM_DA5 M3 LCD_D05 ETM_DA5 GPIO1_5

19 LCD_D04 / ETM_DA4 M2 LCD_D04 ETM_DA9 ETM_DA4 GPIO1_4

20 LCD_D03 / ETM_DA3 L3 LCD_D03 ETM_DA8 ETM_DA3 GPIO1_3

21 LCD_D02 / ETM_DA2 L2 LCD_D02 ETM_DA2 GPIO1_2

22 LCD_D01 / ETM_DA1 K3 LCD_D01 ETM_DA1 GPIO1_1

23 LCD_D00 / ETM_DA0 K2 LCD_D00 ETM_DA0 GPIO1_0

24 ETM_TCTL P4 LCD_RD_E LCD_VSYNC ETM_TCTL GPIO1_24

25 LCD_CS /

Touch_Interrupt

26 JTAG_TRST# D14 JTAG_RTCK

27 JTAG_TMS D12

28 JTAG_TDO E13

29 JTAG_TDI E12

P5 LCD_CS GPIO1_27

ConnectCore™ for i.MX28™ Hardware Reference

Pin Pin Name i.MX28 Mux 0 Mux 1 Mux 2 Mux 3

30 JTAG_TCK E11

31 JTAG_RTCK E14

Provisions have been made on the module for 24 bit color without the JTAG connections.

24 bit Color Pinout (without JTAG)

Pin Pin Name i.MX28

Mux 0 Mux 1 Mux 2

1 LCD_DOTCLK N1 LCD_DOTCLK SAIF1_MCLK ETM_TCLK

2 LCD_VSYNC M6 LCD_RESET LCD_VSYNC

3 LCD_HSYNC M1 LCD_HSYNC SAIF1_SDATA1 EMT_TCTL

4 LCD_ENABLE N5 LCD_ENABLE

5 LCD_WR_RWN /

ETM_TCLK

6 LCD_D17 R3 LCD_D17 ETM_DA6

7 LCD_D16 T3 LCD_D16 ETM_DA7

8 LCD_D15 / ETM_DA15 U3 LCD_D15 ETM_DA15

9 LCD_D14 / ETM_DA14 U2 LCD_D14 ETM_DA14

10 LCD_D13 / ETM_DA13 T2 LCD_D13 ETM_DA13

11 LCD_D12 / ETM_DA12 T1 LCD_D12 ETM_DA12

12 LCD_D11 / ETM_DA11 R2 LCD_D11 ETM_DA11

13 LCD_D10 / ETM_DA10 R1 LCD_D10 ETM_DA10

14 LCD_D09 / ETM_DA9 P3 LCD_D09 ETM_DA4 ETM_DA9

K1 LCD_WR_RWN LCD_HSYNC ETM_TCLK

15 LCD_D08 / ETM_DA8 P2 LCD_D08 ETM_DA3 ETM_DA8

16 LCD_D07 / ETM_DA7 P1 LCD_D07 ETM_DA7

17 LCD_D06 / ETM_DA6 N2 LCD_D06 ETM_DA6

18 LCD_D05 / ETM_DA5 M3 LCD_D05 ETM_DA5

19 LCD_D04 / ETM_DA4 M2 LCD_D04 ETM_DA9 ETM_DA4

20 LCD_D03 / ETM_DA3 L3 LCD_D03 ETM_DA8 ETM_DA3

21 LCD_D02 / ETM_DA2 L2 LCD_D02 ETM_DA2

22 LCD_D01 / ETM_DA1 K3 LCD_D01 ETM_DA1

23 LCD_D00 / ETM_DA0 K2 LCD_D00 ETM_DA0

24 ETM_TCTL P4 LCD_RD_E LCD_VSYNC ETM_TCTL

ConnectCore™ for i.MX28™ Hardware Reference

Pin Pin Name i.MX28

25 LCD_CS /

Touch_Interrupt

26 LCD_D18 U4 LCD_D18 ETM_DA18

27 LCD_D19 T4 LCD_D19 ETM_DA19

28 LCD_D20 R4 LCD_D20 ENET1_1588_EVENT2_OUT ETM_DA3

29 LCD_D21 U5 LCD_D21 ENET1_1588_EVENT2_IN ETM_DA2

30 LCD_D22 T5 LCD_D22 ENET1_1588_EVENT3_OUT ETM_DA1

31 LCD_D23 R5 LCD_D23 ENET1_1588_EVENT3_IN ETM_DA0

P5 LCD_CS LCD_ENABLE

Mux 0 Mux 1 Mux 2

Module Operation

Not all functions are available at the same time or on all module variants. The configuration of the resources will depend on the system requirements, and some planning may be required to set up the available interfaces in a particular application.

DC Power

The ConnectCard for i.MX28 has 5V and Battery inputs:

The 5V supply will have a maximum of 5.25V and a minimum operating voltage of 4.75V. This supply is assumed to come from a regulated supply with about 1A of current capability. The development board supply can generate up to 1.5A.

The Battery voltage needs to be between 3.4 and 4.242V. If both 5V and Battery supplies are connected the module will automatically use the 5V supply.

In addition, there is a +3.3V line coming out of the module which can be used to power external circuitry. This supply can be disabled in low power mode so that it can be used as a low power configuration signal.

Thermal Considerations

At high clock rates the i.MX28 will pull more current. The ConnectCard for i.MX28 has been built to function up to 65C at full clock speed with a thermal pad attached (not included in the development kit) between the processor and the development board. There is a large ground area left open under the module on the development board under the module to accommodate the thermal pad. Bergquist makes thermal pad material in various thicknesses. The CCi.MX28 has been characterized using a combination of 2500S20 and 2000S40 pads from Bergquist. Consult the Freescale data sheet for the i.MX28 for thermal requirements.

System Boot

The ConnectCard for i.MX28 boot process begins at Power On Reset when the hardware reset logic forces the ARM core to begin execution starting from the on-chip boot ROM. Boot ROM

ConnectCore™ for i.MX28™ Hardware Reference

code uses the state of the internal register BOOT_MODE[1:0] as well as the state of various eFUSEs and/or GPIO settings to determine the boot flow behavior of the module.

The following Boot modes are supported:

Boot from FLASH

Boot from SD Card

Boot from USB

Boot from JTAG

Each mode is selected by applying the proper bit pattern to LCD_D00, LCD_D01, LCD_D02, LCD_D03, and LCD_D04. The default boot mode is FLASH. No internal eFUSEs have been set. For more information on boot modes, please refer to chapter 12 of the Freescale documentation.

Audio System

The audio system is using an SAIF interface configured as I2S.

LCD System

The LCD is available through a 31 pin ZIF connector on the top side of the module (see variants for availability). The development kit uses a cable from NICOMATIC (part number 050P331K0076-406406 ). The default LCD setting is for 18 bit color, and the development board is set up for this setting as well. A special 24 bit color option is available (not supported in current variant list) but will disconnect the JTAG functionality. Touch screen functionality is supported by connecting LRADC2-5. There are multiple SPI ports available to communicate with a SPI touch screen controller (the development board uses SSP1). PWM0,1,3,4,5 and 6 are available to use for backlight control (the development board uses PWM0).

GPIO

In general any of the modules digital pins can be set as a GPIO. There are 3 available states for any GPIO-- low, high , and high impedance. Each of the GPIO pins is capable of functioning on either at 1.8 or 3.3V as well as an interrupt/trigger pin. Each individual GPIO can be dynamically programmed at any time to be in either: High-impedance (for input, three-state, or open-drain applications); Low; High; or Controlled by one of the three selectable i.MX28 peripheral module interfaces. The state of any GPIO pin can be read at any time regardless of its configuration. Analog pins may not be set as GPIO. The following functions cannot be used for GPIO functions:

Ethernet

USB

LRADC (although muxed functions can be used)

HSADC

One Wire (Technically it could be by controlling the I2C line)

JTAG

ConnectCore™ for i.MX28™ Hardware Reference

PSWITCH

RESET

DC connections (5V, Battery, and GND)

Interfaces

1-Wire

The ConnectCard for i.MX28 provides a 1-wire interface to communicate with 1-wire devices such as EEPROMs, secure memory and sensors. The required protocol for accessing the generic 1-wire device is defined by Maxim. The Maxim DS2482-100 interface is used for 1Wire communication. The 1-wire interface uses a strong 3.3V pull-up.

ADCs and Touch Screen

The ConnectCard for i.MX28 provides both Low-Resolution ADC's (LRADC) and a High speed ADC (HSADC). In either case, the ADC's have 12 bit resolution and an absolute accuracy of

1.3%.

LRADC's can operate with up to 3.3V inputs, with an absolute accuracy of 1.3%. In addition to ADC functions, LRADC 2-6 can also be used for touch screen control (2-5 are used on the development board for touch screen control). There are 16 ADC channels available, the channel assignments are shown in the table below:

ADC Channel Number Assignment

0-6 LRADC0-6 measure the voltage on the seven application-dependant LRADC

pins.

LRADC2-6 can be used for 4/5-wire touch screen control.

LRADC6 can be used for a wiper of 5-wire touch screen controller and external temperature sensing, but they cannot be enabled at the same time in hardware configuration.

7 Dedicated to measuring the battery voltage.

8, 9 Dedicated to measuring the internal die temperature.

10 Dedicated to measuring the internal 3.3V rail, and for calibrating the voltage

levels measured on the auxiliary channels.

11 Reserved input for analog testing.

12 Dedicated to measuring the internal 1.8V rail.

13 Dedicated to measuring the internal 1.5V rail.

14 Dedicated to measuring the band gap reference voltage and can be used to

calibrate out a portion of the LRADC measurement error. In most cases the band gap reference error dominates the total LRADC error, and this calibration is not helpful.

15 Dedicated to measuring the 5V supply to detect possible issues with the 5V rail

dropping.

ConnectCore™ for i.MX28™ Hardware Reference

The HSADC is capable of measuring up to 2Msps, and can be used in conjunction with the PWM's to generate signals for external devices like a linear image scanner sensor. The HSADC can be triggered to start the conversion of an analog source in three modes:

Trigger by Software

Trigger signal generated by the PWM block

Trigger by an input pin from an external source

CAN

The ConnectCard for i.MX28 includes two FlexCAN2 controllers which are compatible with the CAN 2.0B protocol specification. The CAN Protocol Interface (CPI) manages the serial communication on the CAN bus, requesting RAM access for receiving and transmitting message frames, validating received messages and performing error handling. The Message Buffer Management (MBM) handles Message Buffer selection for reception and transmission, taking care of arbitration and ID matching algorithms. The CAN bus can operate up to 1Mbps

The FlexCAN2 controllers require additional hardware, an example of this circuitry can be found on the development board.

Ethernet

The ConnectCard for i.MX28 provides up to two 10/100 Mbps Ethernet connections (see variants table for number of Ethernet connections). The MAC and PHY are on the module, and the Magnetics and Jack need to be provided external to the module. The connections from the module are differential pairs for the TX and RX ports. In variants with 1 Ethernet 2 USB ports are provided.

USB

The ConnectCard for i.MX28 includes up to two high-speed Universal Serial Bus (USB) version

2.0 controllers and integrated USB Transceiver Macrocell Interface (UTMI) PHYs. The i.MX28 device interface can be attached to USB 2.0 hosts and hubs running in the USB 2.0 high-speed mode at 480 Mbps. It can be attached to USB 2.0 full-speed interfaces at 12 Mbps. Note that a dual-device configuration is not supported. The USB controllers and integrated PHYs support high-speed Host modes for peer-to-peer file interchange. The USB controller can also be configured as a high-speed host.

Each USB is a dynamically configured port that can support up to seven RX and seven TX endpoints besides EP0, each of which may be configured for bulk, interrupt, or isochronous transfers.

USB0 is a high speed, OTG-capable universal serial bus. The ConnectCard for i.MX28 can operate as a host controller that can support eight endpoints: one control, one bulk-out, one bulk-in, and five flexible endpoints. Further, it can negotiate with another OTG system to be either the host or the device in a peer connection.

Note that USB1 is a host-only USB port.

Variants with two USB ports have only one Ethernet port, as noted in the Ethernet section above.

ConnectCore™ for i.MX28™ Hardware Reference

I2C

The ConnectCard for i.MX28 contains 2 two-wire SMB/I2C bus interfaces. Each interface can act as a slave or a master on the SMB. The I

and I

C0 is used for the DUART on the development board, and no termination resistors are

on the module for this interface. I termination resistors are located on the module. The supply voltage of these resistors is

3.3V.

C bus is a standard two-wire serial interface for connecting the ConnectCard for i.MX28

The I to peripheral devices or host controllers. The I

100Kbps and a fast speed of up to 400Kbps. The ConnectCard for i.MX28 can act as either master of slave on the I

C bus. This module is also capable of supporting multi-master

configurations. The device address of the 1-wire bridge is 00, and cannot be used by other

C devices connected to the I2C1 bus.

SAIF (Audio)

The ConnectCard for i.MX28 includes a Serial Audio Interface (SAIF) configured as an I2S intervace. It is capable of transmitting and receiving in 16 or 24 bit audio, by connecting to an audio codec. A possible example circuit is shown in the development board schematics.

C interfaces are multiplexed with the DUART,

C1 is used to run the 1-wire interface, and 2.2K ohm

C buss operates at a standard speed of up to

AUARTs and DUART

Up to four application UARTs (AUART), and 1 debug (console) DUART are available on the ConnectCard for i.MX28 module. The AUARTs are capable of running up to 3.25 Mbps, while the DUART is capable of speeds up to 115Kbps. Var iants us i ng the i.MX287 include flow control on all application UARTs.

Through the DUART the CPU reads and writes data and control/status information through the APBX interface. The DUART does the serial to parallel conversions on data received from a peripheral device and the parallel to serial conversion on data transmitted to the peripheral device. The buffer size for the DUART is 32 bytes. Flow control is not included for the debug UART.

Pulse Width Modulator (PWM)

The ConnectCard for i.MX28 module provides access to PWM0 through PWM6. The PWMs can be used in place of GPIO pins to control such things as LED Brightness, HSADC, and LCD backlight control. Independent output control of each phase allows 0, 1, or high-impedance to be independently selected for the active and inactive phases. Individual outputs can be run in lock step with guaranteed non-overlapping portions for differential drive applications.

Synchronous Serial Ports (SPI, and SD)

The three available Synchronous Serial Ports on the ConnectCard for i.MX28 module can support SPI master and Slave modes up to 52MHz speeds. In addition SSP0 is capable of SD card functions including booting.

Real Time Clock (RTC)

The real-time clock (RTC) and alarm share a one-second pulse time domain. The watchdog reset and millisecond counter run on a one-millisecond time domain. The RTC, alarm, and

ConnectCore™ for i.MX28™ Hardware Reference

persistent bits use persistent storage and reside in a special power domain (crystal domain) that remains powered up even when the rest of the chip is in its powered-down state.

The ConnectCard for i.MX28 development board does not include a backup battery, so the RTC will not be maintained through power cycles.

Liquid Crystal Display (LCD)

Some versions of the ConnectCard for i.MX28 includes an LCD connector that is separate from the edge connector. Smart LCDs are available in a range of sizes and capabilities, from simple text-only displays to WVGA, 16/18/24 bpp color TFT panels. This device supports displays that support moving pictures and require the RGB interface mode (called DOTCLK interface in this document).

Wi-Fi and Bluetooth

The ConnectCard for i.MX28 is available with an Qualcom-Atheros 802.11 a b g n and BT4.0 interfaces. Wi-Fi data rates up to 150 Mbps (5GHz n-mode) are possible. For variants without BT a diversity antenna (using the 2 u.FL ports) is utilized for the 2.4GHz band. For variants with BT a single u.FL antenna connection for both bands is used.

The module is built with coexistence in mind and handles the BT coexistence internally. Cellular coexistence filtering is onboard to aid in designing systems susceptible to cellular interference.

A mini access point mode is available in the Wi-Fi with up to 5 clients. This mode is limited to non DFS channels. The channels available are shown below:

US and Canada - 2.4 GHz band, 5.8, 5.15-5.25 GHz only

EU - 2.4 GHz band only

Japan - 2.4 GHz band only

Embedded Trace Macrocell

The ConnectCard for i.MX28 includes a stand-alone ARM CoreSight Embedded Trace Macrocell, ETM9CSSingle, which provides a instruction trace and a data trace for the ARM9 microprocessor. This function is available on the same connector as the LCD, and many of the pins are shared with the LCD controller. This feature is disabled by default. To enable Embedded Trace Macrocell, external hardware is needed to set LCD_D05 to high during reset (rever to the i.MX28 boot mode configuration).

Reset

The reset pin on the module is low asserted. A low pulse will reset the module. There is an internal pull up resistor to 3.3V, so no external pull up resistor is needed.

Recovery and Power

The power pin is used to turn the ConnectCard for i.MX28 module on when only the battery supply is connected. This is done by connecting about 1V to the pin for 100ms.

The power pin is also used to place the module in recovery mode. This is done by placing

3.3V on the pin for more than 5 seconds. The sb_loader can then be used to boot the part through the USB OTG (USB0) interface.

ConnectCore for i.MX53

NAND FLASH

The ConnectCard for i.MX28 module includes either 128MB or 256MB of NAND FLASH from the Micron Technologies MT29F series. These chips operate from 1.8V.

DDR2 RAM

The DDR2 RAM on the ConnectCard for i.MX28 module is either 128MB or 256MB from the Micron Technologies MT47 series.

+ 57 hidden pages

Digi CCIMX28 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

ConnectCard for i.MX28 Features and Functionality

i.MX28 Features and Functionality

Block Diagram

CPU - Freescale i.MX28X

ConnectCard for i.MX28

Module Pinout

52-Pin PCle Edge Connector

Pinout

Available Features

Standard variants are available with either the i.MX280 or i.MX287. Not all features are available on all variants. For custom variants see your Digi International sales person.

Available Features - i.MX280 and i.MX287

Thermal Considerations

31 Pin LCD, JTAG, and ETM Connector

Standard 18 Bit Color Pinout

24 bit Color Pinout (without JTAG)

Module Operation

DC Power

Thermal Considerations

System Boot

Audio System

LCD System

GPIO

Interfaces

1-Wire

ADCs and Touch Screen

Ethernet

SAIF (Audio)

AUARTs and DUART

Pulse Width Modulator (PWM)

Synchronous Serial Ports (SPI, and SD)

Real Time Clock (RTC)

Liquid Crystal Display (LCD)

Wi-Fi and Bluetooth

Embedded Trace Macrocell

Reset

Recovery and Power

NAND FLASH

DDR2 RAM