Design and specifications¶
If you want to know how BeaglePlay is designed and the detailed specifications, then this chapter is for you. We are going to attept to provide you a short and crisp overview followed by discussing each hardware design element in detail.
You can download BeaglePlay schematic to have clear view of all the elements that makes up the BeaglePlay hardware.
The block diagram below shows all the parts that makes up your BeaglePlay board. BeaglePlay as mentioned in previous chapters is based on AM6254 SoC which is shown in the middle. Connection of other parts like power supply, memory, storage, wifi, ethernet, and others is also clearly shown in the block diagram. This block diagram shows the high level specifications of the BeaglePlay hardware and the sections below this are going to show you the individual part in more detail with schematic diagrams.
System on Chip (SoC)¶
AM62x Sitara™ Processors from Texas Instruments are Human-machine-interaction SoC with Arm® Cortex®-A53-based edge AI and full-HD dual display. AM6254 which is on your BeaglePlay board has a multi core design with Quad 64-bit Arm® Cortex®-A53 microprocessor subsystem at up to 1.4 GHz, Single-core Arm® Cortex®-M4F MCU at up to 400MHz, and Dedicated Device/Power Manager. Talking about the multimedia capabilities of the processor you can connect upto two display monitors with 1920x1080 @ 60fps each, additionally there is a OLDI/LVDS (4 lanes - 2x) and 24-bit RGB parallel interface for connecting external display panels. One 4 Lane CSI camera interface is also available which has support for 1,2,3 or 4 data lane mode up to 2.5Gbps speed. The list of features is very long and if you are interested to know more about the AM62x SoC you may take a look at AM62x Sitara™ Processors datasheet.
Different parts of the board requires different voltages to operate and to fulfill requirements of all the chips on BeaglePlay we have Low Drop Out (LDO) voltage regulators for fixed voltage output and Power Management Integrated Circuit (PMIC) that interface with SoC to generate software programable voltages. 2 x LDOs and 1 x PMIC used on BeaglePlay are shown below.
TLV75801 - LDO¶
This provides 1.0V required by the single-pair Ethernet PHY (U13 - DP83TD510ERHBR). It was decided this was less likely to be needed than the other rails coming off of the primary PMIC and therefore was given its own regulator when running low on power rails.
The voltage drop from 1.8V to 1.0V is rated up to 0.3A (240mW), but the typical current from the DP83TD51E data sheet (SNLS656C) is stated at 3.5mA (2.8mW) and the maximum is 7.5mA (6mW). This isn’t overly significant on a board typically consuming 400mA at 5V (2W). However, this is an area where some power optimization could be performed if concerned about sleep modes.
TLV62595 - DC/DC regulator¶
This provides 3.3V for the vast majority of 3.3V I/Os on the board, off-board 3.3V power to microSD, mikroBUS, QWIIC and Grove connectors, as well as to the PMIC LDO to provide power for the 1.8V on-board I/Os, DDR4, and gigabit Ethernet PHY. Due to the relatively high current rating (3A), a highly efficient (up to 97%) was chosen.
The primary TPS65219 PMIC firmware uses GPO2 to provide the enable signal (VDD_3V3_EN). The power-good signal (VDD_3V3_PG) is available at TP19 and is unused on the rest of the board.
TPS65219 - PMIC¶
This is the primary power management integrated circuit (PMIC) for the design. It coordinates the power sequencing and provides numerous power rails required for the core of the system, including dynamic voltages for the processor core and microSD card. The TPS6521903 variant is used for this DDR4-based system. The 03 at the end indicates the sequencing programmed into the device and is covered in the TPS6521903 Technical Reference Manual SLVUCJ2.
Add specific power-up/down sequence notes here as well a highlight any limitations and known issues.
General Connectivity and Expansion¶
One of the main advantage of using a Single Board Computer (SBC) is having direct accessibility of
general purpose input & output (GPIO) pins and other interfaces like I2C, SPI, ADC, PWM. Your BeaglePlay
board shines in this domain as well with mikroBUS connector that can take 1000s of click board from
MikroElektronika, Grove connector allows to connect hundereds of Grove modules
from Seeed Studio, and QWIIC connector allows to connect I2C modules
like QWIIC modules from SparkFun or STEMMA QT modules from
Adafruit. Note that you also get one USB-A port and one USB-C port.
BeaglePlay’s USB-A port with host support enables you to connect any USB device like your keyboard & mouse.
The USB-C connector allows you to power the board and to connect the board to a PC. You can then connect via SSH or
use the pre-installed VisualStudio Code editor by putting the address
192.168.7.2:3000 in your web browser.
USB A & USB C¶
ADC102S051 - 2ch 10bit ADC¶
Wired and wireless connectivity¶
Single pair ethernet¶
WL1807MOD - WiFi 2.4G/5G¶
CC1352P7 - BLE & SubGHz¶
Memory, Media and Data storage¶
RTC & Debug¶
UART Debug Port¶
AM62x JTAG & TagConnect¶
CC1352 JTAG & TagConnect¶
Dimensions & Weight¶