Texas Instruments AM273x User manual

User’s Guide
AM273x EVM User's Guide
Abstract
The AM273x EVM is an Evaluation module designed to develop software and evaluate the AM273x Radar
Controller and Processor SoC from Texas Instruments. The AM273x is a multicore SoC designed to provide an
integrated control and processing platform for TI AWR mmWave radar front-end devices in both single-device
and cascaded modes of operation. The signal interface between the AM273x EVM and the AWR2243BOOST
mmWave Radar EVM uses the 60-pin Samtec high density connector.
Table of Contents
Abstract...................................................................................................................................................................................... 1
1 Preface: Read This First.........................................................................................................................................................3
1.1 If You Need Assistance...................................................................................................................................................... 3
1.2 Important Usage Notes...................................................................................................................................................... 3
2 Kit Overview............................................................................................................................................................................ 4
2.1 Kit Contents........................................................................................................................................................................4
2.2 Key Features .....................................................................................................................................................................5
2.3 Component Identification................................................................................................................................................... 5
2.4 Daughter Cards..................................................................................................................................................................7
2.5 Compliance........................................................................................................................................................................ 7
3 Board Setup.............................................................................................................................................................................8
3.1 Power Requirements..........................................................................................................................................................8
3.2 Push Buttons......................................................................................................................................................................9
3.3 Switches........................................................................................................................................................................... 11
3.4 LEDs................................................................................................................................................................................ 12
3.5 Boot Mode Selection........................................................................................................................................................ 14
4 Hardware Description...........................................................................................................................................................15
4.1 Functional Block Diagram................................................................................................................................................ 15
4.2 Memory Interface............................................................................................................................................................. 15
4.3 Ethernet Interface.............................................................................................................................................................16
4.4 Micro USB Interfaces....................................................................................................................................................... 18
4.5 I2C Interface.....................................................................................................................................................................22
4.6 UART Interface.................................................................................................................................................................24
4.7 CAN Interfaces.................................................................................................................................................................25
4.8 JTAG Emulation............................................................................................................................................................... 27
4.9 SPI Interface.................................................................................................................................................................... 29
4.10 MDI Interface..................................................................................................................................................................29
4.11 ePWM Interface..............................................................................................................................................................30
5 Connectors............................................................................................................................................................................31
5.1 60-Pin High Density (HD) FE Connector-1 (J1)............................................................................................................... 31
5.2 60-Pin High Density (HD) FE Connector-2 (J11)..............................................................................................................32
5.3 MIPI 60-Pin Connector (J19)............................................................................................................................................33
5.4 Debug Connector 60-Pin (J7).......................................................................................................................................... 34
5.5 External Clock Option (J13, J1)....................................................................................................................................... 36
6 Mechanical Mounting of the PCB........................................................................................................................................37
7 Revision History................................................................................................................................................................... 38
A Rev. C Design Changes....................................................................................................................................................... 39
List of Figures
Figure 2-1. AM273x EVM Top Component Identification.............................................................................................................5
Figure 2-2. AM273x EVM Bottom Component Identification....................................................................................................... 6
Figure 2-3. Interfacing DCA1000 EVM to Debug Connector of the AM273x EVM...................................................................... 7
Figure 3-1. Barrel Jack Connector (J12)......................................................................................................................................8
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Figure 3-2. AM273x EVM Push Buttons...................................................................................................................................... 9
Figure 3-3. AM273x EVM Switches........................................................................................................................................... 11
Figure 3-4. AM273x EVM LED's................................................................................................................................................12
Figure 3-5. SOP Jumpers.......................................................................................................................................................... 14
Figure 4-1. AM273x Functional Block Diagram......................................................................................................................... 15
Figure 4-2. QSPI Interface.........................................................................................................................................................16
Figure 4-3. Board ID EEPROM .................................................................................................................................................16
Figure 4-4. Ethernet Interface Block Diagram........................................................................................................................... 17
Figure 4-5. Etherney PHY Schematic........................................................................................................................................17
Figure 4-6. RJ45 Connector...................................................................................................................................................... 18
Figure 4-7. FTDI USB Block Diagram........................................................................................................................................19
Figure 4-8. FTDI USB Connector.............................................................................................................................................. 20
Figure 4-9. XDS USB Interface Block Diagram......................................................................................................................... 21
Figure 4-10. XDS USB Connector............................................................................................................................................. 22
Figure 4-11. MSS_I2CA Block Diagram.....................................................................................................................................23
Figure 4-12. UART Interface......................................................................................................................................................25
Figure 4-13. CAN-A Interface Block Diagram............................................................................................................................26
Figure 4-14. CAN-A Schematic................................................................................................................................................. 26
Figure 4-15. CAN-B Interface Block Diagram............................................................................................................................27
Figure 4-16. CAN-B Schematic................................................................................................................................................. 27
Figure 4-17. JTAG Emulation Block Diagram............................................................................................................................ 28
Figure 4-18. MSS SPI Interface.................................................................................................................................................29
Figure 4-19. ePWM Debug Header Pin..................................................................................................................................... 30
Figure 5-1. High Density FE Connector-1 Schematic................................................................................................................31
Figure 5-2. High Density FE Connector-2 Schematic................................................................................................................32
Figure 5-3. MIPI 60 Connector Schematic.................................................................................................................................33
Figure 5-4. Debug Connector Schematic.................................................................................................................................. 35
Figure 6-1. TMDS273GPEVM Mechanical Assembly............................................................................................................... 37
Figure 6-2. TMDS273GPEVM Interfaced to the AWR2944BOOST EVM..................................................................................37
Figure 6-3. TMDS273GPEVM Interfaced to the DCA1000 EVM...............................................................................................38
List of Tables
Table 3-1. Power Status LED's.................................................................................................................................................... 9
Table 3-2. EVM Push Buttons....................................................................................................................................................10
Table 3-3. Push Buttons Switches Information.......................................................................................................................... 10
Table 3-4. Switches Information.................................................................................................................................................11
Table 3-5. LED Information........................................................................................................................................................ 13
Table 3-6. Boot Mode Selection Table....................................................................................................................................... 14
Table 4-1. J9 Connector Pin...................................................................................................................................................... 17
Table 4-2. J10 Connector Pin.................................................................................................................................................... 20
Table 4-3. J8 Connector Pin...................................................................................................................................................... 21
Table 4-4. I2C Devices and Addresses......................................................................................................................................24
Table 5-1. J1 Connector Pin ..................................................................................................................................................... 31
Table 5-2. J11 Connector Pin.....................................................................................................................................................32
Table 5-3. J19 Connector Pin.................................................................................................................................................... 34
Table 5-4. J7 Connector Pin...................................................................................................................................................... 35
Table A-1. Rev. C Power Solution Changes.............................................................................................................................. 39
Table A-2. McASP Mux Select...................................................................................................................................................39
Table A-3. eCAP Mux Select..................................................................................................................................................... 39
Trademarks
E2E™ is a trademark of Texas Instruments.
All trademarks are the property of their respective owners.
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1 Preface: Read This First
1.1 If You Need Assistance
If you have any feedback or questions, support for Sitara MCUs and the AM273x EVM development kit is
provided by the TI Product Information Center (PIC) and the TI E2E™ Forum. Contact information for the PIC
can be found on the TI website.
1.2 Important Usage Notes
Note
A 12-V, > 2.5-A supply brick with a 2.1-mm barrel jack (center positive) is not included in the kit and
must be ordered separately. For more information on power requirements go to Section 3.1.
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2 Kit Overview
2.1 Kit Contents
The Sitara AM273x EVM Development Kit contains the following items:
• TMDS273GPEVM
• Micro USB cable
• Ethernet Cable
• Samtec coax micro ribbon cable (HQCD-030-02.00-SEU-TBR-1)
• Spacers, screws, and washers
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2.2 Key Features
• Dual 60-pin high density (HD) connector interface with TI’s front end radar device EVMs, such as the
AWR2243BOOST
• XDS110-based JTAG emulation with Serial port for onboard QSPI flash programming
• UART to USB Debug port for terminal access using FT4232H
• External JTAG/ Emulator Interface with TRACE support over 60-pin MIPI connector
• Debug, SPI, I2C, and LVDS connected to 60-pin Debug connector
• Ethernet interface to stream the captured data over the network to the host PC
• Dual On-board CAN-FD transceiver
• One button and LED for basic user interface
• 12-V power jack to power the board
2.3 Component Identification
Figure 2-1. AM273x EVM Top Component Identification
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Figure 2-2. AM273x EVM Bottom Component Identification
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2.4 Daughter Cards
The AM273x EVM development kit provides an easy and inexpensive way to develop applications with the
AM273x Series microcontroller. Daughter cards are add-on boards that follow a pin-out standard created by
Texas Instruments. The TI and third-party ecosystem of daughter cards greatly expands the peripherals and
potential applications that you can easily explore with the AM273x EVM.
2.4.1 Connecting the TMDS273GPEVM to the AWR2243BOOST EVM
The TMDS273GPEVM can be connected to the AWR2243BOOST EVM for developing a complete radar system
with front end and processor.
2.4.2 Connecting the TMDS273GPEVM to the DCA1000
The TMDS273GPEVM can be connected to the DCA1000 FGPA platform to allow for LVDS data streaming.
TMDS273GPEVM and DCA1000 EVM can be connected with the help of a Samtec ribbon cable connected
between Debug Connector J7 (see Table 5-4) on the TMDS273GPEVM and DCA1000EVM 60-pin connector, as
shown in Figure 2-3.
Figure 2-3. Interfacing DCA1000 EVM to Debug Connector of the AM273x EVM
2.5 Compliance
All components selected meet RoHS and REACH compliance.
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3 Board Setup
3.1 Power Requirements
The AM273x EVM is powered through a barrel jack connection. The power source should be capable of
providing 2.5A at 12 V. The length of the power cable should be < 3 m.
External Power Supply or Power Accessory Requirements:
Nom Output Voltage: 12VDC
Max Output Current: 2500mA
Efficiency Level V
Note
TI recommends using an external power supply or power accessory which complies with applicable
regional safety standards such as (by example) UL, CSA, CDE, CCC, PSE, etc.
The following power supply has been tested to work with the TMDS273GPEVM:
https://www.digikey.in/product-detail/en/cui-inc/SDI65-12-U-P5/102-3417-ND/5277850
Figure 3-1. Barrel Jack Connector (J12)
The AM273x EVM includes a power solution based on a power management integrated circuit (PMIC) to bring
up the power rails according to the power on timing specifications and a LM61460 step-down converter to power
the radar front end connector supplies
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3.1.1 Power Status LED's
Multiple power-indication LED's are provided on-board to indicate to users the output status of major supplies.
Table 3-1. Power Status LED's
Name Default Status Operation Function
D12 ON VBAT_INT Power indicator for 12-V barrel jack supply input
D16 ON PMICOUT_5V0 Power indication for 5-V PMIC output
D13 ON nRESET Indication of nRESET pin. If LED is glowing, the device is out of reset
D2 ON 5V_FE Power indicator for 5-V FE connectors
For further information on the TMDS273GPEVM LED's please see Section 3.4.
3.2 Push Buttons
The EVM supports two buttons that provide a reset and user input to the controller.
Figure 3-2. AM273x EVM Push Buttons
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Table 3-2. EVM Push Buttons
Push Button Signal Function
SW1 TPR_NRST AM273x, PMIC, and FTDI device reset
SW2 MSS_GPIO_28 User interrupt input
Table 3-3. Push Buttons Switches Information
Reference Usage Comments Image
SW1 RESET This Switch is used to RESET
the AM2732, PMIC, and FTDI
device.
SW2 GPIO_28 When pushed, the GPIO_28 (net
MSS_GPIO_28) is pulled high to
PMICOUT_3V3.
When idle (not pushed),
GPIO_28 (net MSS_GPIO_28) is
pulled to ground via a 10 kiloohm
resistor.
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3.3 Switches
The AM273x EVM contains two switches to mux various interfaces to different connectors on the EVM.
Figure 3-3. AM273x EVM Switches
Table 3-4. Switches Information
Reference Usage Comments Image
S1 JTAG When set to ‘MIPI’ position, the
JTAG interface is routed to the MIPI
60-pin connector (J19).
When set to ‘XDS’ position, the
JTAG interface is routed to the
XDS110 USB interface (J8)
S2 SPI When set to ‘PMIC_SPI’ position, the
MSS_SPIB interface is routed to the
PMIC and to the J16 header. 1
When set to ‘DBG_SPI’, the
MSS_SPIB interface is routed to the
60-pin debug header (J7)
1. DNP resistors R5, R61, R167, and R176 must be populated to bring the MSS_SPIB interface out to the J16
header.
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3.4 LEDs
Figure 3-4. AM273x EVM LED's
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Table 3-5. LED Information
Ref Colour Usage Comments Image
D12 Green 12-V supply indication This LED indicates the
presence of 12-V supply input
D16 Green 5-V PMIC Supply This LED indicates the
presence of 5-V supply output
from PMIC
D2 Green 5-V FE Supply This LED indicates the
presence of 5-V supply for FE
connectors
D13 Yellow nRESET This LED is used to indicate
the state of nRESET pin. If this
LED is glowing, the device is
out of reset.
DS2 Red NERR_OUT Glows if there is any HW error
in the AM273x device
D9 Yellow WRMRST Open drain fail safe warm reset
signal
D6 Green GPIO_2 Glows when the GPIO_2 is
logic-1
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3.5 Boot Mode Selection
The TMDS273GPEVM can be set to operate in three different boot modes based on the state of the Sense On
Power (SOP) [2:0] lines. These lines are sensed ONLY during boot up of the AM273x device. The state of the
device is described in Table 3-6.
A closed jumper refers to a ‘1’ and an open jumper refers to a ‘0’ state of the SOP signal going to the AM273x
device.
Table 3-6. Boot Mode Selection Table
Boot Modes Supported SOP2 (J17) SOP1 (J18) SOP0 (J20)
Dev Management/UART Mode (SOP mode 5) 1 0 1
Functional/QSPI Mode (SOP mode 4) 0 0 1
Figure 3-5. SOP Jumpers
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4 Hardware Description
4.1 Functional Block Diagram
Figure 4-1. AM273x Functional Block Diagram
4.2 Memory Interface
4.2.1 QSPI Interface
The TMDS273GMEVM board has a 64 Mbit QSPI memory device (GD25B64CWAG from GigaDevice), which is
connected to the MSS_QSPI interface of the AM273x SoC. This flash device is primarily meant to store the boot
image, but can also serve as storage for other data if another boot mode is used.
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Figure 4-2. QSPI Interface
4.2.2 Board ID EEPROM
The AM273x EVM is a 2 Kbit I2C EEPROM for board ID information. The board ID memory is configured to
respond to I2C address 0x50. This EEPROM (CAV24C02WE-GT3 from Onsemi) interfaces with the SoC via the
MSS_I2CA port.
As seen in Figure 4-3, pins WP is allowed to float while A0, A1, and A2 are pulled to ground. These pins are
pulled low internally. Pins A0, A1, and A2 configure the device address. The WP pin is the Write Protect input.
When pulled high, this pin prevents write operations.
Figure 4-3. Board ID EEPROM
4.3 Ethernet Interface
The TMDS273GPEVM supports an RGMII Ethernet port to provide the connection to the network. This interface
is intended to operate primarily as a 100-Mbps ECU interface. It can also be used as an Instrumentation
Interface.
It supports following features:
• Full Duplex 10Mbps/100Mbps wire rate Interface to Ethernet PHY over RGMII, parallel interface
• MDIO Clause 22 and 45 PHY management interface
• IEEE 1588 Synchronous Ethernet support
The Ethernet port is interfaced to the AM273x through the Ethernet PHY DP83867ERGZR, and is used to
stream the captured data over the network to the host PC.
Figure 4-6 shows the Ethernet RJ45 Mag-Jack connector, and Table 4-1 provides the connector pin details.
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Figure 4-4. Ethernet Interface Block Diagram
Figure 4-5. Etherney PHY Schematic
Table 4-1. J9 Connector Pin
Pin Number Description Pin Number Description
1 GND 2 Test point
3 ETH_D4P 4 ETH_D4N
5 ETH_D3P 6 ETH_D3N
7 ETH_D2P 8 ETH_D2N
9 ETH_D1P 10 ETH_D1N
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Table 4-1. J9 Connector Pin (continued)
Pin Number Description Pin Number Description
11 LED_ACTn 12 GND
13 GND 14 LED_LINKn
15 ETH_GND 16 ETH_GND
Figure 4-6. RJ45 Connector
4.4 Micro USB Interfaces
The TMDS273GPEVM has two standard micro USB connectors.
Micro USB Connector J10 provides access to the AM273x UART, SPI, I2C, and SOP interfaces through the
FTDI chip.
Micro USB connector J8 provides access to the JTAG, MSS_UARTA, and MSS_UARTB interfaces of the
AM273x via the XDS110 emulator.
4.4.1 FTDI USB Interface
Micro USB Connector J10 provides access to the AM273x UART, SPI, I2C, and SOP interfaces through the
FTDI USB Interface IC (the FT4232HL). The FTDI USB Interface IC is configured by the FTDI EEPROM as
described in Section 4.4.1.1.
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Figure 4-7. FTDI USB Block Diagram
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Table 4-2. J10 Connector Pin
Pin Number Description Pin Number Description
1 FTDI_VBUS 2 FTDI_USBD_N
3 FTDI_USBD_P 4 FTDI_USBID
5 GND 6 GND
7 GND 8 GND
9 GND 10 GND
11 GND
Figure 4-8. FTDI USB Connector
4.4.1.1 FTDI EEPROM Memory Device
The TMDS273GPEVM contains a 1Kb serial EEPROM device (93LC46B from Microchip) that holds the
programming information for the FT4232HL USB to UART bridge. By default the 93LC46B contains the power
up data for the FT4232HL to boot into a UART configuration.
4.4.2 XDS USB Interface
Micro USB connector J8 provides access to the JTAG and MSS_UARTA interface with the MSS_UARTB
transmission line of the AM273x via the XDS110 emulator.
This is the UART interface used to flash the binary to the onboard serial flash and for OOB demo.
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