Texas Instruments AM437x Bedienungsanleitung

SPRUII2–November 2017

AM437x IDK Evaluation Hardware

User's Guide

SPRUII2–November 2017

AM437x IDK Evaluation Hardware

This document describes the hardware architecture of the AM437x industrial development kit (IDK), part

number TMDSIDK437x, which is based on the AM437x processor from TI.

Contents

1 Introduction ................................................................................................................... 2

2 Functional Block Description ............................................................................................... 3

3 User Interfaces............................................................................................................... 7

4 Pin Use Description ......................................................................................................... 8

5 Board Connectors ........................................................................................................... 8

6 PCB Guideline Deviations................................................................................................. 14

List of Figures

1 AM437x Industrial EVM .................................................................................................... 2

2 AM437x Industrial EVM Block Diagram................................................................................... 3

List of Tables

1 AM437x Power Supplies From Buck Regulators........................................................................ 4

2 Other Power Supplies....................................................................................................... 4

3 AM437X Industrial EVM I2C Bus Addresses............................................................................. 5

4 AM437x Industrial EVM EEPROM Data.................................................................................. 5

5 LEDs........................................................................................................................... 7

6 AM437x EXP0 Host Connector – J16 .................................................................................... 8

7 AM437x EXP1 I/O Connector – J1........................................................................................ 9

8 Micro SD Connector Pin Details.......................................................................................... 10

9 10/100 PRU Ethernet1 Pin Details....................................................................................... 11

10 10/100/1000 Gb Ethernet Pin Details ................................................................................... 11

11 USB Micro AB Connector................................................................................................. 12

12 AM437x Analog Input Connector......................................................................................... 12

13 AM437x Camera Connector .............................................................................................. 12

14 AM437x eQEP Interface Connector ..................................................................................... 13

15 AM437x EN DAT Interface Connector .................................................................................. 13

16 PCB Guidelines Deviations ............................................................................................... 14

Trademarks

Code Composer Studio is a trademark of Texas Instruments.

Introduction

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AM437x IDK Evaluation Hardware

1 Introduction

The AM437x IDK is a standalone test, development, and evaluation module (EVM) system that lets

developers write software and develop hardware for industrial communication-type applications. The EVM

is equipped with a AM437x processor, from TI, and a defined set of features, to allow the user to

experience industrial communication solutions using serial or Ethernet-based interfaces. Using standard

interfaces, the IDK can interface to other processors or systems, and act as a communication gateway in

this case. In addition the IDK can directly operate as a standard remote I/O system or simple sensor

connected to an industrial communication network. The embedded emulation logic allows for emulation

and debugging using standard development tools such as Code Composer Studio™, from TI, by using the

supplied USB cable.

The following sections give more details regarding the EVM.

1.1 System View

The system view of the AM437x industrial EVM consists of the main board and camera board. Figure 1

shows the top and bottom views of the Industrial EVM.

Figure 1. AM437x Industrial EVM

1.2 Schematics, Design, and Errata Files

Hardware Documentation – Schematics, design files, and other related hardware documentation.

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Functional Block Description

SPRUII2–November 2017

AM437x IDK Evaluation Hardware

2 Functional Block Description

The complete AM437x industrial EVM is mostly contained within a single board. Figure 2 shows the

functional block diagram of the AM437x industrial EVM.

Figure 2. AM437x Industrial EVM Block Diagram

2.1 Processor

The AM437x processor is the central processor for this EVM. All the resources on the board surround the

AM437x processor to provide development capabilities for hardware and software. See the AM437x data

sheet and TRM for details about the processor. There are system configuration signals (SYSBOOT0 to

SYSBOOT18), that can be set on the EVM using resistors to define some startup parameters on the

AM437x processor. See Section 2.5 for more details.

2.2 Clocks

The main clock for the processor is derived from a 24-MHz crystal. An onboard oscillator in the AM437x

generates the base clock and subsequent module clocks as needed within the AM437x processor. A 32-

kHz clock for the RTC on the AM437x is derived from a 32.768-kHz crystal on the board.

Functional Block Description

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2.3 Reset Signals

SYS_RESETn is a reset signal running to several peripherals and the AM437x which performs a reset on

those peripherals. SYS_WARMRESETn is asserted by the push button and used to force a reset of the

AM437x and the other peripherals. The AM437x can also pulldown on the RESET_INOUTn signal to

cause the SYS_RESETn line to go active. The power on reset to the processor is driven from the power

good signal of the power manager.

2.4 Power Supplies

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

2.4.1 Power Source

The AM437x Industrial EVM uses an external 24-V power supply. The 24-V power input is converted into

different voltage levels using buck converters, to provide power input to the AM437x and other

peripherals. The power requirements of the processor are handled by the Quad Power Supervisor IC

TPS386000. The power on LED, D2, is on if the 3.3-V power is available. The power sequencing

requirements of the AM437X processor (see the AM437x data sheet) are handled automatically by the

TPS386000 Power Supervisor chip.

2.4.2 Power Management

The AM437x Industrial EVM uses the buck converters and power supervisor IC for power management.

The I2C0 on the AM437x is used to control the TPS62362 buck converter. For the AM437x Industrial

EVM, Table 1 lists the buck regulators that are used.

Table 1. AM437x Power Supplies From Buck Regulators

Buck Regulator AM437x Power Rail Voltage

TPS5402D (1700 mA) VDDSHV1, 2, 3, 5, 6, 7, 8, 9, 10, 11,

VDDA_3P3V_USB0 and

VDDA_3P3V_USB1 (xxxx mA)

3.3 V (rails that are 3.3 V)

TPS5402D (1700 mA) VDDA_TS_ADC, VDDA_MC_ADC,

VDDS_RTC, VDDS_TPM, VDDS_CTM,

VDDS_CLKOUT, VDDS_OSC,

VDDS_SRAM_CORE_BG,

VDDS_SRAM_MPU_BB,

VDDS_PLL_CORE_LCD,

VDDS_PLL_DDR, VDDS_PLL_MPU,

VDDA1P8V_USB0, VDDA1P8V_USB1

(xxxx mA)

1.8 V (rails that are 1.8 V)

TPS5402D (1700 mA) VDD_DDR and Camera (xxxx mA) 1.5 V

TPS5402D (1700 mA) VDD_CORE, VDD_TPM (xxxx mA) 1.1 V

TPS62362 (3000 mA) VDD_MPU (xxxx mA) 1.2 V

2.4.3 Other Power Supplies

Table 2 lists the other power supplies.

Table 2. Other Power Supplies

Regulator Power Rail Voltage

TPS5402D (1700 mA) VCCB for eQEP (xxxx mA) 5.0 V

LM4132 V1_8DADC 1.8 V

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Functional Block Description

SPRUII2–November 2017

AM437x IDK Evaluation Hardware

2.5 Configuration and Setup

2.5.1 Boot Configuration

Various boot configurations can be set using the pullup and pulldown resistor combinations provided on

the SYSBOOT pins (LCD_D0:15, LCD_VSYNC, LCD_HSYNC, and LCD_EN). Boot configuration pins are

latched upon deassertion of the PORz pin. The default settings for the AM437x IDK EVM 1.3A are

000_0100_0000_0001_1000b. This corresponds to a boot sequence of the following:

1. MMC0

2. USB_MS (USB1)

3. USB_CL (USB0)

4. QSPI

See the GP EVM schematic for more details. See the AM437x TRM and data sheet for the definitions of

each of the sysboot signals.

2.5.2 I2C Address Assignments

In the AM437X Industrial EVM, each separate board has an I2C ID memory that contains the details of the

identity of that board such as its configuration. Table 3 provides information on the I2C address

assignments.

Table 3. AM437X Industrial EVM I2C Bus Addresses

AM437x Industrial EVM Function AM437x I2C Port Address

Baseboard ID memory I2C0 0x50

TPS62362 (buck regulator) I2C0 0x60

Clock synthesizer I2C0 0x65

LED driver I2C2 0x60

2.5.3 I2C ID Memory

The Industrial EVM has a dedicated I2C EEPROM which contains specific identity and configuration

information for that board. In addition, there is available space in each memory for user-specific

configuration information. The part number of the memory device is CAT24C256WI-G.

Table 4. AM437x Industrial EVM EEPROM Data

Name Size (bytes) Contents

Header 4 MSB 0xEE3355AA LSB

Board Name 8 Name for the board in ASCII "A33515BB" = AM437x Industrial EVM

Version 4 Hardware version code for the board in ASCII "1.2A" = rev. 01.2A

Serial Number 12 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

Configuration 32 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 gen purpose EVM

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

Remaining 26 bytes are reserved

Ethernet MAC Address 0 6 MAC Address for AM437x Ethernet MAC 1

Ethernet MAC Address 1 6 MAC Address for AM437x Ethernet MAC 2 or PRU 0

Ethernet MAC Address 2 6 MAC Address for AM437x PRU 1 (if used)

Available 32702 Available space for other nonvolatile codes and data

Functional Block Description

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2.6 JTAG

The AM437x Industrial EVM supports embedded, XDS100V2 USB Emulation through the MicroUSB AB

connector. The EVM also has an optional 20-pin, CJTAG connector, from TI, to support the Emulation.

This CJTAG connector is not installed by default.

2.7 Memories Supported

The Industrial EVM supports onboard memories like the DDR3 SDRAM and SPI NOR Flash. The EVM

also supports a microSD card socket.

2.7.1 DDR3L SDRAM

The Industrial EVM design supports up to 8Gbit (2 × 256M × 16) of DDR3L SDRAM memory. The part

number for the DDR3L SDRAM memory used is MT41K256M16HA-125 AIT:E. The package used is a 96-

ball TFBGA package. See the AM437x TRM for memory locations of this memory.

2.7.2 SPI NOR Flash

The Industrial EVM supports a 512-Kbit (128K × 4) SPI flash memory from Macronix (MX66L51235FMI-

10G) in a 16SOIC package. The SPI port of the AM437X device is used to interface with the flash.

2.7.3 Board Identity Memory

Each board contains a 256KB serial EEPROM which contains board specific data that allows the

processor to 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 2.5 for details on the data in this memory.

2.7.4 SD/MMC0

The SD/MMC connector on the Industrial EVM is a microSD connector, part number SCHA5B0200. This

is a standard SD/MMC Card type of connector. It is connected to the MMC0 port of the AM437x

processor. Check the AM437x data sheet and TRM for supported card types/densities.

2.8 10/100 Ethernet PRU Controlled Ports

The Industrial EVM has two 10/100 Ethernet transceivers (TLK105L) interfaced to connectors J6 and J9.

These Ethernet transceivers are connected to the PRU0 and PRU1 units within the AM437x device. The

reset for the transceivers is driven by the board system reset, SYS_RESETn. A 25-MHz clock drives the

clock signal for the TLK105L.

NOTE: The RJ-45 connectors used on the board have integrated magnetics that are configured in a

NIC configuration which does not support AutoMDIX. When designing a custom board based

on this schematic, be sure to verify whether an AutoMDIX, type RJ-45 connector, is required

for your design.

2.9 Gigabit Ethernet Port

The Industrial EVM has a one Gb (10/100/1000) Ethernet transceiver (KSZ9031RN) interfaced to

connector J4. This gigabit ethernet transceiver is connected to the RGMII 1 unit within the AM437x device.

The reset for the transceiver is driven by the board system reset SYS_RESETn. A 25-MHz clock drives

the clock signal for the KSZ9031RN.

NOTE: The RJ-45 connectors used on the board have integrated magnetics that are configured in a

NIC configuration which does not support AutoMDIX. When designing a custom board based

on this schematic, be sure to verify whether an AutoMDIX, type RJ-45, connector is required

for your design.

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Functional Block Description

SPRUII2–November 2017

AM437x IDK Evaluation Hardware

2.10 USB

The Micro USB-AB connector port is connected to the upstream port of the USB and to the UART

converter IC (FT2232HL). This is used for USB-to-JTAG and USB-to-UART conversion applications. This

USB port can also be used for XDS100V2 emulation. The ESD device, TPD2E001, is used on the USB

signals before they are connected to the AM437X pins.

2.11 ADC

The industrial EVM uses two ADCs. The input to the ADCs is by default connected to the motor sensing

circuit. These ADC inputs are terminated to the I/O expansion header and Magnetic swipe assembly for

user accessibility.

2.12 Camera

The camera Interface from the AM437x processor is terminated on the 12 × 2 header, J5. The camera

interface is supported using the J5 (AXK7L24223G) connector provided. The custom made Camera

Module, from TI, shall be interfaced with this header.

3 User Interfaces

3.1 LEDs

Two RGY LEDs, U1 and U2, are used in the EVM and it is driven by the LCD signals mentioned in

Table 5.

Table 5. LEDs

Signal Name LED Color

AM437X_LCD_PCLK U1 – Red

AM437X_LCD_AC_BIAS_EN U1 – Green

AM437X_LCD_VSYNC U1 – Yellow

AM437X_LCD_HSYNC U2 – Red

AM437X_CAM1_WEN U2 – Green

AM437X_CAM1_DATA2 U2 – Yellow

3.2 Industrial Inputs

For industrial 24-V digital inputs, a SN65HVS882 serializer is used to accept standard signals (from the

I/O Expander header) in and allow the AM437x device to read them. The serialized output from the

serializer is fed to the SPI1 port of the processor.

3.3 Industrial Output LEDs

An I2C-to-8-bit LED driver, TPIC2810, is used to drive the eight industrial output LEDs D3 to D10. The I2C

interface is connected to the I2C2 port of the AM437x processor. The eight LED driver outputs are also

driven to the I/O Expansion header. All the LEDs are green in color.

3.4 DC Motor Drive

Three phase brushless DC motor driver DRV8313 is used to drive the DC motor. The motor driver is

controlled by AM437x through PWM interface. The power to the motor is derived from the internal 24VDC

or through external power using separate power connector J14. Connector J17 is used for motor

connection.

Pin Use Description

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4 Pin Use Description

4.1 Functional Interface Mapping

Some signals of the AM437x device are connected to a fixed device on the EVM that cannot be changed.

Some of the signals of the AM437x device, however, are connected to devices on the EVM based on the

profile setting. See the additional columns in the pinmux document, because there are preset profiles

which define what peripherals are connected and able to be used at a given time on the hardware boards.

Pin Use Assignment – Assignment list of pin functions.

4.2 GPIO Definitions

See the updated pinmux documents, which list use-case columns for the GPIOs. Developers can select

and enable pins, based on the selective peripheral pins, as output or input.

5 Board Connectors

These sections list the board connectors.

5.1 Host Expansion Header – J16

Table 6 lists the Host Expansion header, J16, pin descriptions.

Table 6. AM437x EXP0 Host Connector – J16

Pin No. Signal Description

1 V3_3D 3.3-V power

2 V5_0D 5.0-V power

3 SD_CLKOUT SD clock out

4 AM437X_eHRPWM0B PWM 0B signal

5 SD_CLKIN SD clock in

6 AM437X_eHRPWM0_SYNCI PWM sync input

7 SD_DATA_IN0 SD data input 0

8 AM437X_eHRPWM012_TRPZONE PWM trip zone

9 SD_DATA_IN1 SD data input 1

10 AM437X_eHRPWM0_SYNCO PWM sync output

11 SD_DATA_IN2 SD data input 2

12 AM437X_eHRPWM1B PWM 1B signal

13 SD_DATA_IN3 SD data input 3

14 AM437X_eHRPWM2A PWM 2A signal

15 SD_DATA_IN4 SD data input 4

16 AM437X_eHRPWM2B PWM 2B signal

17 SD_DATA_IN5 SD data input 5

18 PR1_EDC_SYNC0_OUT EDC sync 0 out

19 SD_DATA_IN6 SD data input 6

20 PR1_EDC_SYNC1_OUT EDC sync 1 out

21 SD_DATA_IN7 SD data input 7

22 GND Ground

23 SD_DATA_IN8 SD data input 8

24 eHRPWM0A PWM 0A signal

25 SYS_RESETn System reset

26 SPI0_DIN SPI0 data input

27 AM437X_I2C_SCL I2C clock

28 SPI0_DOUT SPI0 data output

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AM437x IDK Evaluation Hardware

Table 6. AM437x EXP0 Host Connector – J16 (continued)

Pin No. Signal Description

29 AM437X_I2C_SDA I2C data

30 SPI0_CS0n SPI0 chip select

31 AM437X_PRU0_ENDAT0_CLK PRU0 Data0 clock

32 PRU0_ENDAT1_CLK PRU0 Data1 clock

33 AM437X_PRU0_ENDAT0_OUT PRU0 Data0 out

34 PRU0_ENDAT1_OUT PRU0 Data1 out

35 AM437X_PRU0_ENDAT0_OUTEN PRU0 Data0 out enable

36 PRU0_ENDAT1_OUTEN PRU0 Data1 out enable

37 AM437X_PRU0_ENDAT0_IN PRU0 Data0 in

38 PRU0_ENDAT1_IN PRU0 Data1 in

39 GND Ground

40 GND Ground

41 AM437X_CAM0_DATA6 Cam0 Data6

42 eQEP2_STROBE eQEP2 strobe

43 MTR_FAULT MTR fault

44 eQEP2_INDEX eQEP2 index

45 AM437X_PROFI_TXD Profibus transmit

46 eQEP2A_IN eQEP2A in

47 AM437X_PROFI_RXD Profibus receive

48 eQEP2B_IN eQEP2B in

49 PROF_TXENABLE Profibus transmit enable

50 HDQ HDQ

51 eQEP1_STROBE eQEP1 strobe

52 eQEP0_STROBE eQEP0 strobe

53 eQEP1_INDEX eQEP1 index

54 eQEP0_INDEX eQEP0 index

55 eQEP1B_IN eQEP1B in

56 PRU0_ENDAT2_OUTEN PRU0 Data2 out enable

57 eQEP1A_IN eQEP1A in

58 PRU0_ENDAT2_IN PRU0 Data2 in

59 GND Ground

60 GND Ground

5.2 I/O Expansion Header – J1

Table 7 lists the I/O Expansion header, J1, pin descriptions.

Table 7. AM437x EXP1 I/O Connector – J1

Pin No. Signal Description

1 INDUS INPUT0 Digital input 0

2 V24_0D 24-V power

3 INDUS INPUT1 Digital input 1

4 V24_0D 24-V power

5 INDUS INPUT2 Digital input 2

6 V24_0D 24-V power

7 INDUS INPUT3 Digital input 3

8 V24_0D 24-V power

Board Connectors

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Table 7. AM437x EXP1 I/O Connector – J1 (continued)

Pin No. Signal Description

9 INDUS INPUT4 Digital input 4

10 V24_0D 24-V power

11 INDUS INPUT5 Digital input 5

12 V24_0D 24-V power

13 INDUS INPUT6 Digital input 6

14 V24_0D 24-V power

15 INDUS INPUT7 Digital input 7

16 V24_0D 24-V power

17 DGND Ground

18 NC Not connected

19 DRAIN0 Digital output 0

20 DRAIN1 Digital output 1

21 DRAIN2 Digital output 2

22 DRAIN3 Digital output 3

23 DRAIN4 Digital output 4

24 DRAIN5 Digital output 5

25 DRAIN6 Digital output 6

26 DRAIN7 Digital output 7

27 V5_0D 5-V power

28 V5_0D 5-V power

29 DGND Ground

30 DGND Ground

31 AM437X_AIN0 Analog input 0

32 AM437X_AIN4 Analog input 4

33 AM437X_AIN1 Analog input 1

34 AM437X_AIN5 Analog input 5

35 AM437X_AIN2 Analog input 2

36 AM437X_AIN6 Analog input 6

37 AM437X_AIN3 Analog input 3

38 AM437X_AIN7 Analog input 7

39 GNDA_ADC Analog ground

40 GNDA_ADC Analog ground

5.3 SDMMC0 – J19

Table 8 lists the SDMMC0, J19, pin descriptions.

Table 8. Micro SD Connector Pin Details

Pin No. Memory Card PIN No.

uSD#1 DAT2

uSD#2 CD/DAT3

uSD #3 CMD

uSD #4 VDD

uSD #5 CLK

uSD #6 VSS

uSD #7 DAT0

uSD #8 DAT1

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