EPS SKL5010 USB2.0 Contactless Connectivity User Manual
- June 15, 2024
- EPS
Table of Contents
EPS SKL5010 USB2.0 Contactless Connectivity
Overview
This document guides users how to use the SKL5010A/B modules. The pair of modules transmits USB2.0 signals or UART/GPIO/I2C at a distance of several centimeters in a contactless way. SKL5010 opens a new scene for USB2.0 connection applications. This module integrates a MCU and ST60A3, a millimeter wave wireless transceiver chip, which can be simply connected to the existing USB Type-c interface replacing a USB2.0 cable.
Block diagram
Board outlook
Connection method
ST60A3 is ST60 GHz V-Band transceiver for contactless connectivity up to 480Mbps, SKL5010 is the Modules integrate ST60A3 and support USB2.0/UART/GPIO/I2C interface.
Mode selection
The SKL5010A can change the level of the MCU’s PB0 by switching the position
of the resistor to select the SKL5010’s operating mode. PB0 defaults to high
level, meaning SKL5010 operates in USB2.0 tunneling mode. When PB is low,
SKL5010 will work in one of the UART/GPIO/I2C tunneling modes, the UART, GPIO
and I2C tunneling modes are determined by the program burned into the MCU
.
USB2.0 Tunneling Mode Connection diagram:
SKL5010A is in host mode, and the input interface is USB Type-C female, which can be connected to the PC through a USB Type A to C data cable, and directly powered by PC through USB cable. SKL5010B is in device mode, and the output interface is USB type-C male. It needs external 5V power supply and can be connected to any USB2.0 device, such as a USB disk, USB camera, etc.
Installation Method
Please note that SKL5010A and SKL5010B must be used in pairs, and the
Integrated antenna part needs to be aligned face to face with a distance(‘A’)
of less than 6cm, preferred 3cm. Both 0° and 180° relative orientations are
supported as shown in figure.
LED Indicator
Both SKL5010A and SKL5010B have a green LED indicator to indicate the three
states of SKL5010.
- When the green LED lights up but the brightness is low, it indicates that the power supply of SKL5010 is normal, but the wireless connection is not established.
- When the green LDE brightness becomes high and blinks, it indicates that SKL5010A and SKL5010B are establishing a communication connection.
- When the green LED brightness becomes high and is always on, it indicates that SKL5010A and SKL5010B have established communication and can work normally. Note that the SKL5010B will not start powering the USB device until after the Link is established.
Connect to Smart Phone
As shown in the following figure, SKL5010 can also transfer data from a
smartphone with a type-c interface to a PC.
UART Tunneling Mode Connection:
Soldering the pull-down resistor of PB0 will make PB0 of SKL5010A low and put
the module in UART tunnelling mode. The contactless UART data communication
can be tested by powering the module through the 2.0mm pin header, as well as
connecting the USB to UART tool and then connecting it to a PC.
The SKL5010 module can transmit UART signals via the GPIO0(RX) and GPIO1(TX) pins.
| Pin Number | Signal Name | Description |
|---|---|---|
| 1 | 1V8 | Power supply, 1.8V |
| 2 | GPIO0 | UART(RX)/I2C(SCL)/GPIO tunneling, 1.8V level |
| 3 | GPIO1 | UART(TX)/I2C(SDA)/GPIO tunneling 1.8V level |
| 4 | GND | Ground |
The following is the test block diagram of the SKL5010 module in UART tunnel mode:
The above figure shows the physical diagram of the UART tunnel mode connection of the SKL5010 module. Note that both GPIO0 and GPIO1 are at 1.8V levels, so the USB to UART tool needs to be able to match 1.8V levels as well.
The computer is tested for UART communication through the serial port
debugging tool.
GPIO Tunneling Mode Connection:
Please refer to UART Tunneling Mode for GPIO Tunneling Mode setting method and
connection. GPIO Tunneling Mode requires specific firmware to be burned,
please contact the EPS FAE if needed.
I2C Tunneling Mode Connection:
Please refer to UART Tunneling Mode for I2C Tunneling Mode setting method and
connection. I2C Tunneling Mode requires specific firmware to be burned, please
contact the EPS FAE if needed.
Environment constraints
PCB installation
NOTE: If a metal cover is used, a window should be added for microwave signal. Plastic or other microwave insensitive materials can be used to fill the window.
Characteristics
Recommended operating conditions and electrical characteristics
| Symbol | Description | Min | TYP | Max | Unit |
|---|---|---|---|---|---|
| VIN | Power supply | 4.5 | 5 | 5.5 | V |
| CIN | Input current(*) | – | 42 | – | mA |
| P | Total Power consumption | – | 0.21 | – | W |
| TA | Ambient Operating Temperature, for SKL5010A/B | -20 | – | 85 | ℃ |
| Fosc | Carrier Frequency | 60.3 | 60.4 | 60.5 | GHz |
FCC Statement
This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions:
- This device may not cause harmful interference, and
- this device must accept any interference received, including interference that may cause undesired operation. This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one of the following measures:
- Reorient or relocate the receiving antenna.
- Increase the separation between the equipment and the receiver.
- Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
- Consult the dealer or an experienced radio/TV technician for help.
FCC Caution: Any changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate this equipment. This transmitter must not be co-located or operating in conjunction with any other antenna or transmitter.
Revision History
| Date | Version | Changes |
|---|---|---|
| Dec 8 2023 | 1.4 | Updated Block diagram |
| Oct 25 2023 | 1.3 | Add FCC parts, Update ‘Schematic diagram of SKL5010’ |
| Sep 25 2023 | 1.2 | Updated model name SKL5010, Update all features |
| APR 25 2022 | 1.1 | Update ‘Connect to Smart Phone’ |
| APR 25 2022 | 1.0 | Update power supply |
| APR 05 2022 | 0.9 | Initial Release |
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