Texas Instruments AM438x ePOS EVM, TMDXEVM438x User Manual

User's Guide

SPRUIF8–June 2017

AM438x ePOS EVM Hardware

This document describes the hardware architecture of the AM438x evaluation module (EVM), part number TMDXEVM438x, which is based on the Texas Instruments AM438x processor. This EVM is also commonly known as the AM438x Electronic Point of Sale (ePOS) EVM.

Contents

1 Description.................................................................................................................... 3

2 System View.................................................................................................................. 3

3 Functional Blocks Description.............................................................................................. 5

3.1 Processor ............................................................................................................ 5

3.2 Clocks ................................................................................................................ 6

3.3 Reset Signals........................................................................................................ 6

3.4 Memories Supported ............................................................................................... 6

3.5 SDMMC0............................................................................................................. 6

3.6 10/100 Ethernet..................................................................................................... 6

3.7 USB................................................................................................................... 7

3.8 Connectivity.......................................................................................................... 7

3.9 UART................................................................................................................. 7

3.10 ADC................................................................................................................... 7

3.11 Smart Card .......................................................................................................... 7

3.12 Camera............................................................................................................... 7

3.13 Audio ................................................................................................................. 7

3.14 Printer Header....................................................................................................... 7

3.15 Magnetic Stripe Reader............................................................................................ 8

4 Power Supplies .............................................................................................................. 8

4.1 Power Source ....................................................................................................... 8

4.2 Power Sequencing.................................................................................................. 8

4.3 Power-Management IC Power Supplies......................................................................... 8

4.4 APM Sense Resistors.............................................................................................. 9

5 Configuration and Setup .................................................................................................... 9

5.1 Boot Configuration.................................................................................................. 9

5.2 I2C Address Assignments........................................................................................ 10

5.3 I2C ID Memory..................................................................................................... 10

5.4 JTAG................................................................................................................ 10

6 User Interfaces ............................................................................................................. 11

6.1 Keypad.............................................................................................................. 11

6.2 LEDs ................................................................................................................ 11

6.3 Audio Buzzer....................................................................................................... 11

6.4 Display.............................................................................................................. 11

7 Pin Use Description........................................................................................................ 11

7.1 Functional Interface Mapping.................................................................................... 11

8 Board Connectors.......................................................................................................... 12

8.1 SDMMC0 – J10.................................................................................................... 12

8.2 LCD Connector – J44............................................................................................. 12

8.3 Touch Connector – J45........................................................................................... 14

8.4 Ethernet – J8....................................................................................................... 14

8.5 USB ................................................................................................................ 14

8.6 Camera Interface Header – J15................................................................................. 15

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8.7 HDMI Header Connector – J32.................................................................................. 16

8.8 RS-232 Connectors............................................................................................... 16

8.9 Smart Card Connector – J27 .................................................................................... 17

8.10 SAM Card Connector – J28, J29, and J58 .................................................................... 17

8.11 Tamper Header – J34 ............................................................................................ 18

8.12 Platform Test Header – J35...................................................................................... 19

8.13 Magnetic Stripe Reader Header – J36 ......................................................................... 20

8.14 ADC Input Header – J37 ......................................................................................... 20

8.15 GPIO Header – J38............................................................................................... 21

8.16 Printer Header – J90.............................................................................................. 22

8.17 SPI Headers ....................................................................................................... 23

8.18 I2C Header – J39 ................................................................................................. 23

8.19 Automation Header – J97 ........................................................................................ 24

9 EVM Important Notices.................................................................................................... 24

List of Figures

1 AM438x ePOS EVM Top View............................................................................................. 3

2 AM438x ePOS EVM Bottom View......................................................................................... 4

3 AM438x ePOS EVM Block Diagram ...................................................................................... 5

List of Tables

1 AM438x Power Supplies From TPS65218............................................................................... 8

2 Other Power Supplies....................................................................................................... 8

3 AM438x ePOS EVM APM Sense Resistors ............................................................................. 9

4 SYSBOOT DIP Switches ................................................................................................... 9

5 AM438x ePOS EVM EEPROM Data .................................................................................... 10

6 AM438x SDMMC0 Connector Pin Details .............................................................................. 12

7 AM438x LCD Connector Pin Details..................................................................................... 12

8 LCD Capacitive Touchscreen Pin Details............................................................................... 14

9 AM438x 10/100 Ethernet Pin Details.................................................................................... 14

10 AM438x Micro AB Connector – USB Port 0 Pin Details .............................................................. 14

11 AM438x Type A Connector – USB Port 1 Pin Details................................................................. 15

12 Camera Interface Header Pin Details ................................................................................... 15

13 HDMI Header Pin Details ................................................................................................. 16

14 RS-232 Connector 1 Pin Details ......................................................................................... 16

15 RS-232 Connector 2 Pin Details ......................................................................................... 17

16 Smart Card Connector Pin Details....................................................................................... 17

17 SAM Card Connector Pin Details ........................................................................................ 17

18 Tamper Header Pin Details............................................................................................... 18

19 Platform Test Header Pin Details ........................................................................................ 19

20 Magnetic Stripe Reader Header Pin Details............................................................................ 20

21 ADC Input Header Pin Details............................................................................................ 20

22 GPIO Header Pin Details.................................................................................................. 21

23 Printer Header Pin Details ................................................................................................ 22

24 SPI - Header 1 Pin Details................................................................................................ 23

25 SPI - Header 2 Pin Details................................................................................................ 23

26 I2C - Header Pin Details .................................................................................................. 23

27 Automation - Header Pin Details......................................................................................... 24

AM438x ePOS EVM Hardware

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1 Description

The AM438x ePOS EVM is a stand-alone test, development, and evaluation module system that lets developers write software and develop hardware around an AM438x processor subsystem. The main elements of the AM438x subsystem are already available on the base board of the EVM. The base board gives developers the basic resources needed for most general-purpose type projects that encompass the AM438x as the main processor. Furthermore, additional, common peripherals, such as memory, sensors, LCD, Ethernet physical layer (PHY), and so on, are built into the EVM so that prospective systems can be modeled quickly without significant additional hardware resources.

The following sections give more details regarding the EVM.

2 System View

Figure 1 and Figure 2 show the system view of the AM438x ePOS EVM.

Description

SmartReflex is a trademark of Texas Instruments. Micron is a registered trademark of Micron. Samtec is a registered trademark of Samtech Inc.

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Figure 1. AM438x ePOS EVM Top View

AM438x ePOS EVM Hardware

System View

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Figure 2. AM438x ePOS EVM Bottom View

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SMART CARD

CONN

12X2 HDR

NAND 4GBIT

LPDDR2

8GBIT

SMART

CARD PHY

PMIC &

REGULATORS

HDMI DRVR

32 BIT

BUFFER (x2)

TWL1200

RS232 PHY

ETH PHY

AUDIO

CODEC

SPI FLASH

512MBIT

MAG STRIPE HDR

JTAG 10X2

HDR

DSS

SC, I2C

UART 0 UART 1

UART3,MMC1,

McASP0

I2C0

GPIO

McASP1

USB

DEBUG

RMII

SAM CARD

CONNX3

MICRO AB

GPIO

2X16

KEYS

TAMPER BOARD

CAMERA BOARD

7" LCD WITH CAPACITIVE TOUCH

BATTERY BOARD

8x2 HDR

USB TYPE- A

MICRO AB

COM8

CONN

J T A

U S B 1

U S B 0

C A M 1

Q S P

M M C 0

D D R

G P M C

RS232 PHY

AM438X

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3 Functional Blocks Description

The AM438x ePOS EVM has a camera board and/or wireless add-on boards. Figure 3 shows the block diagram of the ePOS EVM.

Functional Blocks Description

3.1 Processor

The following sections describe the major blocks of the ePOS EVM.

The AM438x processor is the central processor to this EVM. All the resources onboard surround the AM438x processor to provide development capabilities for hardware and software. See the AM438x data sheet and TRM for details about the processor.

System configuration signals (SYSBOOT0 to SYSBOOT18) on the EVM can be set using resistors and switches to define some start-up parameters on the AM438x processor. See Section 5 for more details.

Figure 3. AM438x ePOS EVM Block Diagram

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Functional Blocks Description

3.2 Clocks

Several clocks in the EVM support the AM438x processor. The main clock for the processor is derived from a 25-MHz crystal. An onboard oscillator in the AM438x device generates the base clock and subsequent module clocks as needed within the AM438x processor. A 32-kHz clock for the real-time clock (RTC) on the AM438x device is derived from a 32.768-kHz crystal on the board.

The EVM also supports an option to connect an external clock using a subminiature version A (SMA) connector for both these clocks. However, hardware modifications are needed to isolate the onboard crystals and connect the external clock. See the schematics and TRM for details.

3.3 Reset Signals

Power-on reset to the processor is driven from the power good signal of the power manager and by a hard reset switch. Asserting this switch also activates the reset signal SYS_RESETn, which runs to several peripherals and the AM438x and resets those peripherals.

3.4 Memories Supported

3.4.1 LPDDR2 SDRAM

The AM438x ePOS EVM contains 8Gb (256M x 32, 2 dies) of LPDDR2 SDRAM memory from Micron®, which has dual dies. The part number for the LPDDR2 SDRAM memory device used is MT42L256M32D2LG-25. The package used is an 168-ball VFBGA package.

3.4.2 NAND Flash

The ePOS EVM has a NAND type of flash. The part number of the memory device used is MT29F4G08AB, which is a 4Gb (512M × 8) of flash memory. The GPMC signals are used to communicate with this memory.

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3.4.3 QSPI Flash

A QSPI flash of 512Mb, part number MX66L51235FMI-10G, is used in this design. The QSPI flash boot is enabled through this flash. This flash is connected to the SPI0 port of the processor.

3.4.4 Board Identity Memory

Each board contains a serial EEPROM that contains board-specific data that lets the processor automatically detect which board is connected and the version of that board. Other hardware-specific data can be stored on this memory device as well. The part number of the memory device is CAT24C256WI-G. See Section 5 for details on the data in this memory.

3.5 SDMMC0

The SDMMC0 connector on the ePOS EVM is a microSD card socket, part number MHC-W21-601. This device is a standard SD/MMC card type of connector. The SDMMC0 connector is connected to the MMC0 port of the AM438x processor. Check the AM438x data sheet and TRM for supported card types and densities.

3.6 10/100 Ethernet

The AM438x ePOS EVM uses the 10/100 Ethernet transceiver (DP83848J) from TI, which is connected to the J8 RJ45 connector.

The reset on the transceiver is driven by the board system reset signal, SYS_RESETn, and the individual reset signal, ETHER_RESETn, that is controlled by the GPIO of the AM438x processor. A 50-MHz crystal oscillator drives the clock signal for the DP83848J device.

The PHY address is set to 0x10h.

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3.7 USB

The AM438x ePOS EVM supports two USB ports. The USB ports are connected to a microAB connector and a standard type-A connector. The ESD device, TPD4S012, and common choke filter, ACM2012 (TDK), are used on the USB signals before they are connected to the AM438x pins. The ID pin of the microAB connector can be tied to ground through a J24 jumper to look like a B device.

3.8 Connectivity

The AM438x ePOS EVM supports MCS COM8 form factor wireless boards from TI through the J21 COM connector, which is a Samtec®card edge-type connector, part number MEC6-150-02-S-D-RA1. This connector supports COM8 boards; more details are in the MCS COM8 board documents.

The COM connector requires 3.6 V, 442 mA on the power supply. Therefore a TPS79501 LDO regulator is used to provide this voltage supply from the base 5.0-V supply.

The signals on the COM board are all 1.8-V voltage level. Therefore voltage translators are placed to convert to and from 3.3 V of the AM438x rail for a particular signal that is running at 3.3 V.

3.9 UART

This EVM supports two UART ports, UART0 and UART1. The UART0 port from the processor is converted to USB using the FT2232HL USB-to-UART bridge. UART1 is terminated on a DB9 connector using the MAX3243 RS-232 transceiver between the AM438x and the DB9 connector. UART0 can also be optionally terminated with a DB9 connector and a RS-232 transceiver. The RS-232 and DB9 connectors are unpopulated on the board.

Functional Blocks Description

3.10 ADC

The analog inputs to the AM438x device are terminated on the J36 connector, where a magnetic-stripe assembly must be connected.

3.11 Smart Card

There is a full smart card connector FCI, part number 52400-25ALF, on the EVM. There are also three SAM card sockets onboard. A TCA5013 Smartcard PHY controls these cards and is controlled by I2C2 from the AM438x.

The PHY I2C address is set to 0x3E.

3.12 Camera

Camera interface from the AM438x processor is terminated on the 12x2 header J15. The custom-made camera module from TI shall be interfaced with this header. This camera module is on a separate camera board that attaches at a right angle, so that the camera can face horizontally when the ePOS EVM is laying on a testbench.

The I2C address set to camera module is 0x30.

3.13 Audio

This EVM uses an audio codec from TI, part number TLV320AIC3111, for the audio input and output. This audio codec is connected through the McASP1 and I2C interfaces to the AM438x. The microphone is implemented as a 3.5-mm jack with stereo connection. Speaker out is implemented with integrated speakers. The PUI speakers are attached to the PCB and their solder lugs are connected to the throughhole connections for each speaker. The audio codec reset is driven by the board system reset, SYS_RESETn, and an individual reset signal that is controlled by a GPIO of the AM438x.

3.14 Printer Header

This EVM has a 2 × 12 header to connect to an external printer. The header connects several GPIOs, SPI buses, and PWM signals to control a printer.

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Functional Blocks Description

3.15 Magnetic Stripe Reader

This EVM provides a 7-pin connector, part number 0533980771, to connect to the magnetic stripe reader. The magnetic stripe reader is connected to the ADC analog inputs 0 to 7 of the AM438x processor.

4 Power Supplies

This section describes how the power supplies required for the design are generated.

4.1 Power Source

The AM438x ePOS EVM uses an external AC to +5 VDC (rated 2.5 A minimum) power adapter. The switch near the power cable is used for powering on and off. The main power is on when the power switch is positioned away from the power supply jack. The main power is off when the power switch is positioned closest to the power supply jack.

4.2 Power Sequencing

The power sequencing requirements of the AM438X processor (see the AM438x data sheet) are automatically handled by the TPS65218 PMIC.

4.3 Power-Management IC Power Supplies

The AM438x ePOS EVM uses the TPS65218 power-management IC from TI. The I2C0 on the AM438x is used to control the SmartReflex™ port and control port on the TPS65218 device. For the AM438x processor, the following power supplies from the TPS65218 device are used (see Table 1).

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Table 1. AM438x Power Supplies From TPS65218

TPS65218 Power Supply AM438x Power Rail Voltage (V)

VDCDC1 VDD_CORE 1.1 V VDCDC2 VDD_MPU 1.1 V VDCDC3 VDD2, VDDCA, VDDQ of LPDDR2 1.2 V VLS1 VDD_DDR 1.2 V

VDDS_CLKOUT, VDDS_OSC, VDDS_SRAM_CORE_BG,

V1_8D

V1_0BAT VDD_TPM 1.0 V V1_8BAT VDDS_TPM 1.8 V V3_3D_AM438X from

TPS63031 V5_0D HDMI circuitry, USB0 power 5.0 V

VDDS_SRAM_MPU_BB VDDS_PLL_DDR, VDDS_PLL_MPU, VDDA1P8V_USB0, VDDA1P8V_USB1, VPP, VDDA_MC_ADC, VDDA_TS_ADC, VDDS_CTM, VDDS, VDDS_RTC, COM8, Tamper, and ADC input sections

VDDSHV 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 3.3 V

1.8 V

Table 2. Other Power Supplies

Power Supply Power Rail Voltage (V)

V1_8LPDDR2 from TPS78101

V3_3D

V3_3FTDI FT2232 section from TPS79333 3.3 V

VBAT

V1_2D HDMI section power 1.2 V

VDD1 of LPDDR2 1.8 V NAND memory, QPSI flash, Ethernet PHY, SDMMC0, board ID memory, ARM

JTAG, buffers of FTDI section, LCD buffer, touchscreen, camera module, HDMI buffer, audio codec, RS-232 sections, COM8 sections, smart card sections, tamper header, platform test section, GPIO header, and printer

LCD POWER generation, camera module, VCOM_BAT generation for COM8 module, USB1 power generation, platform test section, LEDs, GPIO header, buzzer, printer

3.3 V

xx V

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4.4 APM Sense Resistors

The AM438x ePOS EVM has the following subsystems with current sense resistors (see Table 3). These resistors allow measurement of power on each power rail, to check AM438x power requirements during real-time software execution. The value of the resistors is selected to provide the best dynamic range when using a TI INA226 converter. In fact, an INA226 converter is installed on the EVM for VDD_CORE, VDD_MPU, VAM438X_DDR, V1_8D_AM438X, V3_3D_AM438X, and VDDS_DDR power supply rails of the AM438x. Also, the measurement connections of all the sense resistors are attached to 2-pin standard headers so that they can be read easily by a multimeter or connected to an INA226 converter EVM.

The AM438x ePOS EVM has the option to access the INA devices through the onboard AM438X I2C0 port by closing jumpers J101 and J102. By default, the INA226 converter is connected to the 5-pin header J39. See the schematics for more details.

NOTE: The value of the sense resistors for VDD_CORE and VDD_MPU were selected to give better

dynamic range for active power modes, rather than sleep or low power modes. If power is to be measured for VDD_CORE or VDD_MPU for sleep or low-power modes, then this sense resistor value must be changed to give better shunt voltage values.

Voltage Net Sense Resistor Value

VDD_CORE 0.05 Ω VDD_MPU 0.05 Ω VAM438X_DDR 0.05 Ω V1_8D_AM438X 0.05 Ω V3_3D_AM438X 0.1 Ω VDDS_DDR 0.05 Ω

Power Supplies

Table 3. AM438x ePOS EVM APM Sense Resistors

5 Configuration and Setup

5.1 Boot Configuration

SYSBOOT pins on the AM438x can be configured a certain way using a 10-bit DIP switch on the EVM. This SYSBOOT switch configures the AM438x to different settings. For instance, the boot method of the processor can be set up by configuring the DIP switch to particular settings. The SW48 DIP switch has the switches that set SYSBOOT[0...4, 6, 7, 17, 18]. Other SYSBOOT pin settings are done through resistors pulled either high or low. See the AM438x TRM and data sheet for the actual definitions of each SYSBOOT signal. Table 4 provides the mapping of the boot strap pin and the corresponding switch bits.

DIP Switch Bits (SW48) Boot Strap

Bit 1 SYSBOOT18 Bit 2 SYSBOOT17 Bit 3 SYSBOOT7 Bit 4 SYSBOOT6 Bit 5 SYSBOOT4 Bit 6 SYSBOOT3 Bit 7 SYSBOOT2 Bit 8 SYSBOOT1 Bit 9 SYSBOOT0

Bit 10 NC (not connected)

Table 4. SYSBOOT DIP Switches

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Configuration and Setup

When the DIP switch is on, then the corresponding SYSBOOT signal is pulled high. When the DIP switch is off, then the corresponding SYSBOOT signal is pulled low. See the ePOS EVM schematic for more details.

5.2 I2C Address Assignments

See the first page of the schematic for I2C device addresses.

5.3 I2C ID Memory

The ePOS EVM has a dedicated I2C EEPROM that contains specific identity and configuration information for that board (see Table 5). In addition, there is available space in each memory for user-specific configuration information. The part number of the memory device is CAT24C256WI-G.

Name Size (bytes) Contents

Header 4 MSB 0xEE3355AA LSB Board name 8 Name for board in ASCII "A33515BB" = AM438x ePOS EVM Version 4 Hardware version code for board in ASCII "1.4A" = rev. 01.4A

Serial number 12

Configuration 32

Ethernet MAC address #0 6 MAC address for AM438x Ethernet MAC #1 Ethernet MAC address #1 6 MAC address for AM438x Ethernet MAC #2 or PRU #0 Ethernet MAC address #2 6 MAC address for AM438x PRU #1 (if used) Available 32702 Available space for other nonvolatile codes and data

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Table 5. AM438x ePOS EVM EEPROM Data

Serial number of the board. This is a 12-character string: WWYY4P16nnnn, where:

• WW = 2-digit week of the year of production

• YY = 2-digit year of production

• nnnn = incrementing board number

Codes to show the configuration setup on this board. For the available EVMs supported, the following codes are used:

• ASCII "SKU#01" = base board for general purpose EVM

• ASCII "SKU#02" = base board for industrial motor control EVM

• Remaining 26 bytes are reserved

5.4 JTAG

The AM438x ePOS EVM supports embedded XDS100V2 USB emulation using the microAB connector. One of the FT2232 ports is used to covert these JTAG signals to USB and the other port is used for UART signals. The ePOS EVM also has an optional 20-pin CJTAG connector from TI, to support the emulation. Other JTAG adapters are available on TI's website and can be purchased here.

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6 User Interfaces

6.1 Keypad

The keypad has 4 × 4 push-button switches with Omron part number B3SL-1022P. The keypad is replicated on the top and bottom of the board to allow the LCD to be swung out for hardware debugging of the main components, or for the LCD to be mounted to the board for software debugging only. This keypad uses 4 power lines and 4 scan lines to enable monitoring of 16 buttons. The buttons are arranged mechanically as a standard 3 × 4 telephone dial pad and four arrow cursor directional buttons.

6.2 LEDs

There are four LEDs: red, yellow, green, and blue colors, on the top and bottom sides of the EVM. A green power-on indication LED (D3) is available in the EVM.

6.3 Audio Buzzer

An audio buzzer is installed on the board to provide auditory cues to the user. This audio buzzer PUI audio part number AI-1027-TWT-3V-R is driven from a GPIO.

6.4 Display

This EVM supports either LCD or HDMI display options. The AM438x DSS (display subsystem) signals are connected to the LCD or HDMI display through the 32-bit, buffer/driver SN74LVC32244ZKE from TI. The selection between LCD and HDMI is controlled by a GPIO of the AM438x.

User Interfaces

6.4.1 HDMI

A Silicon Image SIL9022A HDMI transmitter converts the DSS signals to HDMI. The HDMI signals are terminated at the HDMI connector-J32, part number 10029449-001RLF. SIL9022A is controlled by I2C2 from the AM438x. The HDMI reset is driven by the board system reset SYS_RESETn and an individual reset signal that is controlled by a GPIO of the AM438x. For more details see the schematics.

The I2C Address of SIL9022A is 0X3B.

6.4.2 LCD and Touchscreen

The LCD signals are terminated at the 50-pin FPC connector (J44), part number FH12S-50S-0.5SH. The LCD that mates with this connector is a 7-inch, WVGA (800 × 480) 24-bit, RGB, TFT LCD panel, part number OSD070T1718-19TS. The connector supports 27 white LEDs for backlight (controlled by one power regulator). The LED backlight on the LCD is controlled by a TPS61081 PWM controlled LED driver. The LCD has a capacitive touchscreen that is connected to the I2C0 port of the processor. The required power for the LCD is generated using the TPS65105 linear regulator supply.

The I2C address of the touchscreen is 0X5C.

7 Pin Use Description

7.1 Functional Interface Mapping

A pinmux configuration file is provided to show how each pin on the AM438x is configured on the EVM. Most interfaces on the EVM are fixed to certain functions. See the AM438x data sheet to determine other possible pin MUX configurations, to enable different functionalities for signals that are not fixed to certain function board connectors.

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Board Connectors

8 Board Connectors

The pinout details of all the connectors used in the ePOS EVM are provided in the following sections.

8.1 SDMMC0 – J10

Table 6 lists the pin details of the AM438x SDMMC0 connector.

Pin No. Signal

MMC plus, MMC mobile, MMC, RS-MMC, SD#1 MMC0_D3 MMC plus, MMC mobile, MMC, RS-MMC, SD#2 MMC0_CMD MMC plus, MMC mobile, MMC, RS-MMC, SD#3 GND MMC plus, MMC mobile, MMC, RS-MMC, SD#4 VCC MMC plus, MMC mobile, MMC, RS-MMC, SD#5 MMC0_CLK MMC plus, MMC mobile, MMC, RS-MMC, SD#6 GND MMC plus, MMC mobile, MMC, RS-MMC, SD#7 MMC0_D0 MMC plus, MMC mobile, SD#8 MMC0_D1 MMC plus, MMC mobile, SD#9 MMC0_D2 MMC plus, MMC mobile#10 NC MMC plus, MMC mobile#11 NC MMC plus, MMC mobile#12 NC MMC plus, MMC mobile#13 NC miniSD#1 MMC0_D3 miniSD#2 MMC0_CMD miniSD#3 GND miniSD#4 VCC miniSD#5 MMC0_CLK miniSD#6 GND miniSD#7 MMC0_D0 miniSD#8 MMC0_D1 miniSD#9 MMC0_D2 miniSD#10 NC miniSD#11 NC

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Table 6. AM438x SDMMC0 Connector Pin Details

8.2 LCD Connector – J44

Table 7 lists the pin details of the LCD connector.

Pin No. Signal Description

1 VLED+ Backlight power + 2 VLED+ Backlight power + 3 VLED- Backlight power – 4 VLED- Backlight power – 5 GND Ground 6 VLCD_VCOM Voltage 7 VLCD_DVDD Voltage 8 GND Ground 9 LCD_EN LCD enable

10 LCD_VSYNC LCD vertical sync

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Table 7. AM438x LCD Connector Pin Details

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Board Connectors

Table 7. AM438x LCD Connector Pin Details (continued)

Pin No. Signal Description

11 LCD_HSYNC LCD horizontal sync 12 LCD_BLUE7 LCD blue data 7 13 LCD_BLUE6 LCD blue data 6 14 LCD_BLUE5 LCD blue data 5 15 LCD_BLUE4 LCD blue data 4 16 LCD_BLUE3 LCD blue data 3 17 LCD_BLUE2 LCD blue data 2 18 LCD_BLUE1 LCD blue data 1 19 LCD_BLUE0 LCD blue data 0 20 LCD_GREEN7 LCD green data 7 21 LCD_GREEN6 LCD green data 6 22 LCD_GREEN5 LCD green data 5 23 LCD_GREEN4 LCD green data 4 24 LCD_GREEN3 LCD green data 3 25 LCD_GREEN2 LCD green data 2 26 LCD_GREEN1 LCD green data 1 27 LCD_GREEN0 LCD green data 0 28 LCD_RED7 LCD red data 7 29 LCD_RED6 LCD red data 6 30 LCD_RED5 LCD red data 5 31 LCD_RED4 LCD red data 4 32 LCD_RED3 LCD red data 3 33 LCD_RED2 LCD red data 2 34 LCD_RED1 LCD red data 1 35 LCD_RED0 LCD red data 0 36 GND Ground 37 LCD_PCLK Clock 38 GND Ground 39 LCD_LEFTRIGHT Left-right scan direction select 40 LCD_UPDOWN Up-down scan direction select 41 VLCD_VGH Voltage high 42 VLCD_VGL Voltage low 43 VLCD_AVDD Voltage analog 44 LCD_RESETn Reset 45 NC NC 46 VLCD_VCOM Voltage 47 LCD_DITHER Dither 48 GND Ground 49 NC NC 50 NC NC

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Board Connectors

8.3 Touch Connector – J45

Table 8 lists the pin details of the LCD capacitive touchscreen connector.

Pin No. Direction Description

1 NC NC 2 NC NC 3 TSC_INTn Touchscreen interrupt 4 GP_I2C_SDA I2C data 5 GP_I2C_SCK I2C clock 6 SYS_RESETn Reset 7 GND Ground 8 VCC Power

8.4 Ethernet – J8

Table 9 lists the pin details of the AM438x 10/100 Ethernet connector.

Pin No. Signal Name Description

1 ETHER1_RDP Data 1 RX positive 2 ETHER1_RDN Data 1 RX negative 3 VCC Voltage 4 VCC Voltage 5 ETHER1_TDP Data 1 TX positive 6 ETHER1_TDP Data 1 TX negative 7 NC NC

8 DGND Ground D1 LINK LED ANODE Anode of link LED D2 LINK LED CATHODE Cathode of link LED D3 SPEED LED ANODE Anode of speed LED D4 SPEED LED CATHODE Cathode of speed LED

SHLD1 DGND Ground SHLD2 DGND Ground

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Table 8. LCD Capacitive Touchscreen Pin Details

Table 9. AM438x 10/100 Ethernet Pin Details

8.5 USB

8.5.1 Micro AB Connector – J23

Table 10 lists pin details of the AM438x micro AB connector.

Table 10. AM438x Micro AB Connector – USB Port 0 Pin Details

Pin No. Signal Name Description

1 VUSB_VBUS0 USB0 bus voltage

2 USB0_CONN_DM USB0 data minus

3 USB0_CONN_DP USB0 data plus

4 USB0_ID USB0 identification

5 DGND Ground

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8.5.2 Type A Connector – J26

Table 11 lists pin details of the AM438x type A connector.

Table 11. AM438x Type A Connector – USB Port 1 Pin Details

Pin No. Signal Name Description

1 VUSB_VBUS1 USB1 bus voltage

2 USB1_CONN_DM USB1 data minus

3 USB1_CONN_DP USB1 data plus

4 DGND Ground

8.6 Camera Interface Header – J15

Table 12 lists the pin details of the camera interface header connector.

Table 12. Camera Interface Header Pin Details

Pin No. Signal Name Description

1 VBAT Power supply VBAT

2 CAM1_VSYNC Vertical sync

3 CAM1_DATA0 Data 1

4 CAM1_HSYNC Horizontal sync

5 CAM1_DATA1 Data 1

6 CAM1_DATA6 Data 6

7 CAM1_DATA2 Data 2

8 CAM1_DATA7 Data 7

9 CAM1_PCLK Clock

10 CAM1_DATA8 Data 8 11 GND Ground 12 GND Ground 13 CAM1_DATA3 Data 3 14 CAM1_DATA9 Data 9 15 CAM1_DATA4 Data 4 16 CAM1_GIO0 GPIO 0 17 CAM1_DATA5 Data 5 18 CAM1_BUF_EN Buffer enable 19 CAM1_WEN Write enable 20 CAM1_FIELD Field 21 GND Ground 22 CAM1_I2C_SCL I2C clock 23 CAM1_SRCCLK Clock 24 CAM1_I2C_DTA I2C data

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8.7 HDMI Header Connector – J32

Table 13 lists the pin details of the HDMI header connecter.

Pin No. Signal Name Description

1 HDMI_TX2+ Data Transmit2 +ve

2 DAT2_S Data 2 GND

3 HDMI_TX2- Data Transmit2 -ve

4 HDMI_TX1+ Data Transmit1 +ve

5 DAT1_S Data 1 GND

6 HDMI_TX1- Data Transmit1 -ve

7 HDMI_TX0+ Data Transmit0 +ve

8 DAT0_S Data 0 GND

9 HDMI_TX0- Data Transmit0 -ve

10 CLK+ Clock +ve 11 Clock_S Clock GND 12 Clock- Clock -ve 13 HDMICONN_CEC CEC 14 NC NC 15 HDMICONN_I2CSCL I2C clock 16 HDMICONN_I2CSDA I2C data 17 GND Ground 18 V5_0HDMICONN Voltage 19 HDMICONN_HPLG HPLG

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Table 13. HDMI Header Pin Details

8.8 RS-232 Connectors

8.8.1 RS-232 Connector 1 – J19

Table 14 lists the pin details of RS-232 connector 1 (not mounted).

Pin No. Signal Name Description

1 NC NC

2 RS232_0_RXD Receive

3 RS232_0_TXD Transmit

4 NC NC

5 GND Ground

6 NC NC

7 RS232_0_RTS Request to send

8 RS232_0_CTS Clear to send

9 NC NC

Table 14. RS-232 Connector 1 Pin Details

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8.8.2 RS-232 Connector 2 – J20

Table 15 lists the pin details of RS-232 connector 2.

Table 15. RS-232 Connector 2 Pin Details

Pin No. Signal Name Description

1 RS232_1_DCD Data carrier detect

2 RS232_1_RXD Receive

3 RS232_1_TXD Transmit

4 RS232_1_DTR Data terminal ready

5 GND Ground

6 RS232_1_DSR Data set ready

7 RS232_1_RTS Request to send

8 RS232_1_CTS Clear to send

9 RS232_1_RI Ring indicator

8.9 Smart Card Connector – J27

Table 16 lists the pin details of the smart card connector.

Table 16. Smart Card Connector Pin Details

Pin Name Signal Name Description

Sensor1 SMRTCRD1_PRES Smart card present Sensor2 V3_3D Voltage 3.3 V

T1 VCC_SC1 Voltage T2 SMRTCRD1_RST Reset T3 SMRTCRD1_CLK Clock T4 SMRTCRD1_C4 Auxillary I/O T5 GND Ground T6 VCC_SC1 Voltage T7 SMRTCRD1_IO I/O T8 SMRTCRD1_C8 Auxillary I/O

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8.10 SAM Card Connector – J28, J29, and J58

Three SAM card connectors are used in this ePOS EVM design. Table 17 lists the pinout details of the SAM card connector.

Pin Name Signal Name Description

C1 VCC_SC2 Voltage C2 SAMCRD_RST Smart card reset C3 SAMCRD_CLK Smart card clock C5 GND Ground C6 VCC_SC2 Voltage C7 SAMCRD_IO I/O

SW1 NC NC SW2 NC NC

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Table 17. SAM Card Connector Pin Details

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8.11 Tamper Header – J34

Table 18 lists the pin details of the tamper header.

Pin No. Signal Name Description

1 V1_8BAT Voltage 1.8 V

2 V3_3D Voltage 3.3 V

3 GND Reserved

4 RESERVED5 Tamper event signal

5 TM_PIO_0 I/O 0

6 TM_PIO_1 I/O 1

7 TM_PIO_2 I/O 2

8 TM_PIO_3 I/O 3

9 RESERVED1 Reserved

10 TPMSS_OUT TPMSS_out signal 11 TM_PIO_8 I/O 8 12 TM_PIO_9 I/O 9 13 TM_PIO_10 I/O 10 14 TM_PIO_11 I/O 11 15 RESERVED3 Reserved 16 RESERVED4 Reserved 17 NC NC 18 NC NC 19 RTC_ALARM RTC alarm 20 GND Ground

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Table 18. Tamper Header Pin Details

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8.12 Platform Test Header – J35

Table 19 lists the pin details of the platform test header.

Pin No. Signal Name Description

1 VBAT Voltage V

2 DGND Digital ground

3 VBAT Voltage V

4 DGND Digital ground

5 V3_3D Voltage 3.3 V

6 DGND Digital ground

7 GPIO5_4 GPIO

8 GPIO5_9 GPIO

9 DGND Digital ground

10 GPIO5_10 GPIO 11 GPIO5_6 GPIO 12 DGND Digital ground 13 GPIO5_7 GPIO 14 GPIO5_11 GPIO 15 DGND Digital ground 16 GPIO5_12 GPIO 17 GPIO5_8 GPIO 18 GPIO5_5 GPIO 19 GPIO5_13 GPIO 20 AM438X_AIN5 Analog input 5 21 GNDA_ADC Analog ground 22 AM438X_AIN4 Analog input 4 23 VDDA_ADC Voltage ADC 24 AM438X_AIN3 Analog input 3

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Table 19. Platform Test Header Pin Details

BAT

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8.13 Magnetic Stripe Reader Header – J36

Table 20 lists the pin details of the magnetic stripe reader header.

Table 20. Magnetic Stripe Reader Header Pin Details

Pin No. Signal Name Description

1 AM438X_MAGAIN0 Magnetic-stripe reader analog input 0

2 AM438X_MAGAIN1 Magnetic-stripe reader analog input 1

3 AM438X_MAGAIN2 Magnetic-stripe reader analog input 2

4 AM438X_MAGAIN3 Magnetic-stripe reader analog input 3

5 AM438X_MAGAIN4 Magnetic-stripe reader analog input 4

6 AM438X_MAGAIN5 Magnetic-stripe reader analog input 5

7 GNDA_MAG Analog ground

8.14 ADC Input Header – J37

Table 21 lists the pin details of the ADC input header.

Table 21. ADC Input Header Pin Details

Pin No. Signal Name Description

1 MON_AIN0 Monitoring analog input 0

2 MON_AIN4 Monitoring analog input 4

3 MON_AIN1 Monitoring analog input 1

4 MON_AIN5 Monitoring analog input 5

5 GND_ADC Analog ground

6 V1_8D Voltage 1.8 V

7 MON_AIN2 Monitoring analog input 2

8 MON_AIN6 Monitoring analog input 6

9 MON_AIN3 Monitoring analog input 3

10 MON_AIN7 Monitoring analog input 7 11 GND_ADC Analog ground 12 GND_ADC Analog ground

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8.15 GPIO Header – J38

Table 22 lists the pin details of the GPIO header.

Pin No. Signal Name Description

1 V3_3D Voltage 3.3 V

2 VBAT Voltage V

3 GPIO0 General-purpose I/O 0

4 NC NC

5 GPIO1 General-purpose I/O 1

6 NC NC

7 GPIO2 General-purpose I/O 2

8 NC NC

9 GPIO3 General-purpose I/O 3

10 NC NC 11 GPIO4 General-purpose I/O 4 12 NC NC 13 GPIO5 General-purpose I/O 5 14 NC NC 15 GPIO6 General-purpose I/O 6 16 NC NC 17 GPIO7 General-purpose I/O 7 18 NC NC 19 GPIO8 General-purpose I/O 8 20 NC NC 21 GPIO9 General-purpose I/O 9 22 NC NC 23 GPIO10 General-purpose I/O 10 24 NC NC 25 GPIO11 General-purpose I/O 11 26 NC NC 27 GPIO12 General-purpose I/O 12 28 NC NC 29 GPIO13 General-purpose I/O 13 30 NC NC 31 GPIO14 General-purpose I/O 14 32 NC NC 33 GPIO15 General-purpose I/O 15 34 NC NC 35 GPIO16 General-purpose I/O 16 36 NC NC 37 GPIO17 General-purpose I/O 17 38 NC NC 39 DGND Ground 40 DGND Ground

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Table 22. GPIO Header Pin Details

BAT

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8.16 Printer Header – J90

Table 23 lists the pin details of the printer header.

Pin No. Signal Name Description

1 VBAT Voltage V

2 V3_3D Voltage 3.3 V

3 VBAT Voltage V

4 eHRPWM0_A PWM signal 0 – A

5 PRINTER_GPIO3 General-purpose I/O 3

6 eHRPWM0_B PWM signal 0 – B

7 PRINTER_GPIO2 General-purpose I/O 2

8 eHRPWM0_TRIPZONE PWM signal 0 Trip Zone

9 PRINTER_GPIO1 General-purpose I/O 1

10 eHRPWM0_SYNCI PWM 0 Sync 11 PRINTER_GPIO0 General-purpose I/O 0 12 eHRPWM1_A PWM 1 – A 13 DGND Ground 14 eHRPWM1_B PWM 1 – B 15 PRINT_SPI_CLK SPI clock 16 DGND Ground 17 PRINT_SPI_CSn SPI chip select 18 NC NC 19 PRINT_SPI_MOSI SPI master out slave in 20 NC NC 21 PRINT_SPI_MISO SPI master in slave out 22 NC NC 23 DGND Ground 24 NC NC

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Table 23. Printer Header Pin Details

BAT

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8.17 SPI Headers

8.17.1 SPI Header 1 – J31

Table 24 lists the pin details of SPI header 1.

Pin No. Signal Name Description

1 V3_3D 3.3-V supply

2 DGND Ground

3 AM438X_SPI0_SCLK SPI0 clock

4 AM438X_SPI0_DIN SPI0 data in

5 AM438X_SPI0_DOUT SPI0 data out

6 AM438X_SPI0_CS0 SPI0 chip select

7 DGND Ground

8 NC NC

8.17.2 SPI Header 2 – J30

Table 25 lists the pin details of SPI header 2.

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Table 24. SPI - Header 1 Pin Details

Table 25. SPI - Header 2 Pin Details

Pin No. Signal Name Description

1 V3_3D 3.3-V supply

2 DGND Ground

3 AM438X_SPI1_SCLK SPI1 clock

4 AM438X_SPI1_D1 SPI1 D1

5 AM438X_SPI1_D0 SPI1_D0

6 AM438X_SPI1_CS0n SPI1 chip select

7 DGND Ground

8 AM438X_STATUS_LED1 Status LED1

8.18 I2C Header – J39

Table 26 lists the pin details of the I2C header.

Pin No. Signal Name Description

1 PWRMON_I2CSCL I2C clock

2 PWRMON_I2CSDA I2C data

3 DGND Ground

4 PM_ALERT Alert

5 NC NC

Table 26. I2C - Header Pin Details

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8.19 Automation Header – J97

Table 27 lists the pin details of the automation header.

Pin No. Signal Name Description

1 V3_3D Voltage 3.3 V

2 V3_3D Voltage 3.3 V

3 V3_3D Voltage 3.3 V

4 NC NC

5 NC NC

6 NC NC

7 DGND Ground

8 SYSBOOT0 Boot strap bit 0

9 SYSBOOT1 Boot strap bit 1

10 SYSBOOT2 Boot strap bit 2 11 SYSBOOT3 Boot strap bit 3 12 SYSBOOT4 Boot strap bit 4 13 SYSBOOT6 Boot strap bit 6 14 SYSBOOT7 Boot strap bit 7 15 SYSBOOT17 Boot strap bit 17 16 DGND Ground 17 SYSBOOT18 Boot strap bit 18 18 NC NC 19 NC NC 20 NC NC 21 NC NC 22 NC NC 23 NC NC 24 NC NC 25 DGND Ground 26 NC NC 27 TEST_PORZn Reset signal 28 NC NC 29 TEST_WARMRESETn Reset signal 30 NC NC 31 NC NC 32 TEST_GPIO17 GPIO 33 NC NC 34 DGND Ground 35 NC NC 36 PWRMON_I2CSCL Power monitor I2C clock 37 NC NC 38 PWRMON_I2CSDA Power monitor I2C data 39 NC NC 40 DGND Ground

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Table 27. Automation - Header Pin Details

9 EVM Important Notices

The standard terms and conditions for TI Evaluation Modules can be downloaded here.

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