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AM437x StarterKit EVM Hardware User's Guide Verified Design Literature Number:

AM437x StarterKit EVM Hardware User's Guide Verified Design Literature Number: SPRUHW8 June 2014 Verified Design SPRUHW8–June 2014 AM437x StarterKit EVM Hardware User's Guide Lawrence Ronk An IMPORTANT NOTICE at the end of this TI reference design addresses authorized use, intellectual property matters and other important disclaimers and information. 1 Introduction This document describes the hardware architecture of the AM437x StarterKit (part number TMDXSK437X), which is based on the Texas Instruments (TI) AM437x processor. This EVM is also commonly known as the AM437x StarterKit EVM. 1.1 Description The AM437x StarterKit can be used as an evaluation and development platform for AM437x-based solutions and networking platforms. The embedded emulation logic allows emulation and debug-using standard development tools such as TI’s Code Composer Studio by using the supplied USB cable. The embedded emulation logic is not intended for use in end products. All of the design information is freely available and can be used as the basis for the development of an AM437x-based product. The following sections give more details regarding the StarterKit EVM. 1.2 System View The top and bottom views of the system are provided in Figure 1 and Figure 2. Figure 1. AM437x StarterKit EVM Top View Figure 2. AM437x StarterKit EVM Bottom View 2 AM437x StarterKit EVM Hardware User's Guide SPRUHW8–June 2014 Submit Documentation Feedback Copyright © 2014, Texas Instruments Incorporated www.ti.com Functional Blocks Description 2 Functional Blocks Description The complete AM437x StarterKit EVM is contained mostly within a single board. Figure 3. AM437x StarterKit EVM Block Diagram 2.1 Processor The AM437x 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 the details about the processor. System configuration signals (sysboot0 to 18) can be set on the EVM, using resistors to define some startup parameters on the AM437x processor. See Section 4 for more details. 2.2 Clocks The StarterKit EVM has several clocks to support the AM437x processor. The main clock for the processor is derived from a 24-MHz crystal. The AM437x generates the base clock and subsequent module clocks. A 32-kHz clock for the RTC is derived from a 32.768-kHz crystal on the board. 2.3 Reset Signals SYS_RESETn is a reset signal running to several peripherals and AM437x, which performs a reset. SYS_RESETn signal is asserted by the push-button and is used to force a reset of the AM437x and the other peripherals. AM437x can also pull down 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. 3 SPRUHW8–June 2014 AM437x StarterKit EVM Hardware User's Guide Submit Documentation Feedback Copyright © 2014, Texas Instruments Incorporated Functional Blocks Description www.ti.com 2.4 DDR3 SDRAM The AM437x StarterKit EVM contains two 4-Gb (256 Mb × 16) of DDR3L SDRAM memory from Micron. The part number for the DDR3L SDRAM memory used is MT41K256M16HA. The package used is an 96- ball FBGA. See the AM437x TRM for memory locations for this memory. 2.5 NOR Flash The StarterKit EVM has a NOR type of flash. The part number of the memory used is MX66L51235FMI, which is a 512-Mb serial flash memory. The QSPI interface of AM437x is used to communicate with this memory. 2.6 Board Identity Memory Each board contains a serial EEPROM that contains board-specific data that allows the processor to automatically detect which version of the board is connected. 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 4 for details on the data in this memory. 2.7 SDMMC0 The SDMMC0 connector on the StarterKit EVM is a microSD socket with part number SCHA5B0200. This connector is a standard SD/MMC card type. The connector links to the MMC0 port of the AM437x processor. Check the AM437x data sheet and TRM for supported card types and densities. 2.8 10/100/1000 Ethernet The AM437x StarterKit EVM has two 10/100/1000 Ethernet transceivers from Micrel (KSZ9031RN) that are connected to RJ45 (J6 and J8) connectors. The reset on the transceiver is driven by the warm reset signal SYS_RESETn. A 25-MHz crystal drives the clock input of the KSZ9031RN Ethernet physical layer (PHY). The PHY address is set to 0x00h. 2.9 USB The AM437x StarterKit EVM supports two USB ports. The USB ports are connected to a micro-USB AB connector and a standard A-type connector. The ESD device TPD4S012 and common choke filter ACM2012 (TDK) are used on the USB signals before they are connected to the AM437x pins. 2.10 Connectivity The AM437x StarterKit EVM supports MCS COM8 form-factor wireless boards from TI through the J20 COM connector, which is a Samtec card edge type connector MEC6-150-02-S-D-RA1. This connector supports COM8-type of boards. More details about this connector can be found in the MCS COM8 board documents. The COM connector requires 3.6 V, 442 mA on the power supply. Thus, 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. Thus, voltage translators are placed to convert to and from 3.3 V of the AM437x rail for a particular signal, which is running at 3.3 V. 2.11 Camera Camera interface from the AM437x processor is terminated on the 12×2 header J15. The custom-made camera module from TI must interface with this header. This camera module is on a separate camera board that attaches at a right angle so the camera can face horizontally when the StarterKit EVM is lying on a test bench. 4 AM437x StarterKit EVM Hardware User's Guide SPRUHW8–June 2014 Submit Documentation Feedback Copyright © 2014, Texas Instruments Incorporated www.ti.com Functional Blocks Description 2.12 Audio The headphone output and line input signals from the two 3.5-mm SJ3524 jacks are connected to the audio codec with part number TLV320AIC3106. This audio codec is connected through the McASP1 and I2C interfaces to the AM437x. 2.13 Accelerometer The AM437x StarterKit EVM has an accelerometer sensor from ST Microelectronics (LIS331DLH). This accelerometer is interfaced with the processor using I2C bus1. 3 Power Supplies This section describes how the required power supplies for the design are generated. 3.1 Power Source An external AC to 5-V-DC (rated 2.5 A minimum) power adapter is connected to the AM437x Starter Kit EVM through the DC Jack, J4. 3.2 Power Sequencing The power sequencing requirements of the AM437X processor (see the AM437x data sheet) are handled automatically by the TPS65218 PMIC. 5 SPRUHW8–June 2014 AM437x StarterKit EVM Hardware User's Guide Submit Documentation Feedback Copyright © 2014, Texas Instruments Incorporated Power Supplies www.ti.com 3.3 Power Management IC Power Supplies The AM437x StarterKit EVM uses the TPS65218 power management IC. The I2C0 on AM437x is used to control the smart reflex port and control port on the TPS65218. Table 1 and Table 2 provide the following power supplies used for AM437x. Table 1. AM437x Power Supplies from TPS65218 TPS65218 POWER SUPPLY AM437X POWER RAIL VOLTAGE VDCDC1 VDD_CORE, VDD_TPM 1.1 V VDCDC2 VDD_MPU 1.1 V VDCDC3 VDDS_DDR 1.35 V VLS1 VDD_DDR 1.35 V VDDS_CLKOUT, VDDS_OSC , VDDS_SRAM_CORE_BG , 1.8 V VDDS_SRAM_MPU_BB, VDDS_PLL_CORE_LCD, VDDS_PLL_DDR , V1_8D_AM437X VDDS_PLL_MPU , VDDA1P8V_USB0 , VDDA1P8V_USB1 , VDDS_CTM, VDDS_TPM, VDDA_MC_ADC, VDDA_TS_ADC, VDDS, COM8, VDDSHV2, tamper , ADC input sections V1_0BAT CAP_VDD_RTC 1.0 V V1_8BAT VDDS_RTC 1.8 V V3_3D_AM438X VDDA_3P3V_USB0, VDDA_3P3V_USB1, VDDSHV1, 3, 5, 6, 7, 8, 9, 10, and 11 3.3 V V5_0D HDMI circuitry, USB0 power 5.0 V NOTE: The TPS65218 power management IC that is used on the earlier revisions had several issues that can affect operation. See the errata for the TPS65218 for more details. 3.3.1 Other Power Supplies Used Table 2. Other Power Supplies POWER SUPPLY POWER RAIL VOLTAGE V1_8LPDDR2 from TPS78101 VDD1 of LPDDR2 1.8 V NAND memory, QPSI flash, Ethernet PHY, SDMMC0, board ID memory, ARM JTAG, buffers of FTDI section, LCD buffer, touch screen, V3_3D camera module, HDMI buffer, audio codec, RS-232 sections, COM8 3.3 V sections, smart card sections, tamper header, platform test section, GPIO header, printer V3_3FTDI FT2232 Section from TPS79333 3.3 V LCD power generation, camera module, VCOM_BAT generation for VBAT COM8 module, USB1 power generation, platform test section, LEDs, 5.0 V GPIO header, buzzer, printer V1_2D HDMI section power 1.2 V 3.4 APM Sense Resistors The AM437x StarterKit EVM has the following subsystems with current sense resistors. These resistors allow the power to be measured on each power rail to check AM437x 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. An INA226 converter is installed on the EVM for both the VDD_CORE and VDD_MPU power supply rails of the AM437x. The other power rails have sense resistors, but have their measurement connections attached to 2pin standard headers so they can be read easily by a multimeter or connected to an INA226 converter EVM. 6 AM437x StarterKit EVM Hardware User's uploads/Geographie/ verified-design-am437x-starterkit-evm-hardware-user-x27-s-guide.pdf