USound GmbH DATA SHEET ⏐IOCASTE Subject to change without notice Version 1.0, 2017-November-06 USound™ www.usound.com USound GmbH Version 1.0, 2017-Nov-06 www.usound.com 1 Audio System for VR/AR Glasses Features 〉 Bluetooth 1 controller compliant to Bluetooth specification V4.1 〉 Support A2DP and HFP profiles 〉 Operating Voltage from a 3.6V battery 〉 Battery charging with micro USB 〉 Wide audio bandwidth Battery Lifetime (typical) 〉 2 Hours (continuous music stream) Applications 〉 Eye ware 2 〉 AR Glasses 2 〉 VR Glasses 〉 Other kinds of wearable Description The Iocaste is a fully-integrated Audio system that can be placed inside eyeware temples. The max required thickness to integrate the system is 5mm It features a Bluetooth controller, 2 woofers, 4 MEMS tweeters, 2 Microphones (with beam forming), a power management that allows operations using batteries with typical 3.6 V power supply, 32bit low power micro-controller (ARM Cortex-M4). USound delivers the module with pre-sert audio filters, using the micro controller it is possible to modify and adapt the filters to customer specific requirements 1 Bluetooth is a trademark owned by the Bluetooth Special Interest Group (SIG) 2 Due to exclusivity agreement the availability of samples is restricted and subject to third party approval
Transcript
USound GmbH DATA SHEET ⏐IOCASTE Subject to change without notice Version 1.0, 2017-November-06 USound™ www.usound.com
USound GmbH
Version 1.0, 2017-Nov-06
www.usound.com
1
Audio System for VR/AR Glasses
Features
〉 Bluetooth1 controller compliant to Bluetooth specification V4.1
〉 Support A2DP and HFP profiles
〉 Operating Voltage from a 3.6V battery
〉 Battery charging with micro USB
〉 Wide audio bandwidth
Battery Lifetime (typical)
〉 2 Hours (continuous music stream)
Applications
〉 Eye ware2
〉 AR Glasses2
〉 VR Glasses
〉 Other kinds of wearable
Description
The Iocaste is a fully-integrated Audio system that can be placed inside eyeware temples.
The max required thickness to integrate the system is 5mm
It features a Bluetooth controller, 2 woofers, 4 MEMS tweeters, 2 Microphones (with beam forming), a power management that allows operations using batteries with typical 3.6 V power supply, 32bit low power micro-controller (ARM Cortex-M4).
USound delivers the module with pre-sert audio filters, using the micro controller it is possible to modify and adapt the filters to customer specific requirements
1 Bluetooth is a trademark owned by the Bluetooth Special Interest Group (SIG) 2 Due to exclusivity agreement the availability of samples is restricted and subject to third party approval
USound GmbH DATA SHEET ⏐IOCASTE Subject to change without notice Version 1.0, 2017-November-06 USound™ www.usound.com
USound GmbH DATA SHEET ⏐IOCASTE Subject to change without notice Version 1.0, 2017-November-06 USound™ www.usound.com
USound GmbH
Version 1.0, 2017-Nov-06
www.usound.com
3
1 Introduction The Iocaste is a fully-integrated Audio system that can be placed inside eyeware temples.
The max required thickness to integrate the system is 5mm
It features a Bluetooth controller, 2 woofers, 4 MEMS tweeters, 2 Microphones (with beam forming), a power management that allows operations using batteries with typical 3.6 V power supply, 32bit low power micro-controller (ARM Cortex-M4).
USound delivers the module with pre-sert audio filters, using the micro controller it is possible to modify and adapt the filters to customer specific requirements
2 Block Diagram 2.1 Left temple:
• 2 Microphones
o For picking up own voice during phone calls, 2 mics for beam forming
• Bluetooth
o For wireless audio play back, for voice / phone calls, i.e. wireless connection to smartphone
• Microprocessor/DSP
o For running beam forming algorithm, filter functions, etc.
• Audio amplifiers/drivers/DAC
o Power amplifiers DAC (if required) and drivers for woofer & tweeters
USound GmbH DATA SHEET ⏐IOCASTE Subject to change without notice Version 1.0, 2017-November-06 USound™ www.usound.com
USound GmbH
Version 1.0, 2017-Nov-06
www.usound.com
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USound GmbH DATA SHEET ⏐IOCASTE Subject to change without notice Version 1.0, 2017-November-06 USound™ www.usound.com
USound GmbH
Version 1.0, 2017-Nov-06
www.usound.com
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3 Bill of materials (BOM) 3.1 Right PCB
USound GmbH DATA SHEET ⏐IOCASTE Subject to change without notice Version 1.0, 2017-November-06 USound™ www.usound.com
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3.2 Left PCB
USound GmbH DATA SHEET ⏐IOCASTE Subject to change without notice Version 1.0, 2017-November-06 USound™ www.usound.com
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4 Operating conditions The typical operating conditions for the development kit are 0°C to 45°C
5 Audio characteristics 5.1 SPL @10cm
45
50
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75
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85
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100 1.000 10.000
SPL 1
0cm[d
B]
Frequency[Hz]
IoCaste|SPL
70dB@1kHz MaxSPL
USound GmbH DATA SHEET ⏐IOCASTE Subject to change without notice Version 1.0, 2017-November-06 USound™ www.usound.com
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5.2 THD Typical
5.3 Polar Patterns
5.3.1 Radiation on the horizontal plane. Left temple. Front port pointing at 0°
0
2
4
6
8
10
12
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16
18
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100 1.000 10.000
THD[%
]
Frequency[Hz]
IoCaste|THD
70dB@1kHz
USound GmbH DATA SHEET ⏐IOCASTE Subject to change without notice Version 1.0, 2017-November-06 USound™ www.usound.com
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5.3.2 Radiation on the vertical plane. Left temple. Front port pointing at 0°
6 Functions 6.1 Voice call When the glasses are connected to a phone they enable you to take calls. Upon receiving a call the glasses will play your ringtone. You can accept the call by pressing the multi-function button. End the call by again pressing the multi-function button again.
Side note: Declining an incoming call is not implemented yet.
Principle diagram for ‘Voice call’ use case.
USound GmbH DATA SHEET ⏐IOCASTE Subject to change without notice Version 1.0, 2017-November-06 USound™ www.usound.com
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6.2 Audio listening The glasses can play music that is played on your Bluetooth device (like a smartphone or a Bluetooth-enabled portable music player). You can start and stop the music from both your Bluetooth device and from the glasses. Press the multi-function button to toggle play/pause.
If you listen to music and receive an incoming call at the same time, the music will automatically pause. After ending the call, the music will automatically start again.
6.3 Battery low
During music playback, the battery will last more than 1 hour. The glasses will emit a warning sound approximately 5 minutes before the battery is depleted, and the LED will blink slowly. When the battery is depleted, the shutdown sequence will automatically initiate and the glasses will play the downwards melody to confirm shutdown.
6.4 Charging To recharge the battery, plug a Micro USB cable in the Micro USB slot located on the right temple and connect it to a suitable power supply (any powered USB outlet will do, as will any USB power supply). The glasses will automatically turn off (if they haven’t been turned off beforehand) and go into charging mode, shown by the blinking LED. As soon as the battery is completely recharged, the LED stops blinking and illuminates constantly.
Principle diagram for ‘Audio listening’ use case.
Principle diagram for ‘Charging’ use case.
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6.5 Bluetooth pairing To pair the glasses with a new Bluetooth device, the glasses need to be switched off first. Then press the multi-function button continuously for 5 seconds. After 3 seconds the start-up sequence will be initiated. Continue to press the multi-function button until the “pairing in progress” sound is played and the LED starts blinking. Now select the glasses on your other Bluetooth device (e.g. smartphone) to start the connection. The blinking will stop when the glasses are correctly paired with the other Bluetooth device.
Side note: There is no ‘de-pairing’ function; you have the switch off the glasses before you can pair the glasses to a different Bluetooth device.
Side note for iPhone users: If your mobile phone was once connected with the glasses, but not the latest device for this glasses to be paired with, you have to first ‘delete’ the glasses out of your phones ‘recently used devices’ list. Now the glasses will reappear like a new device and you can correctly start the pairing process.
6.6 Turn-on and Turn-off
6.6.1 Turn-on
• The electronics is activated via the on/off push button on the right temple. One short push will initiate the startup sequence.
• The power management unit will turn on and provide the necessary voltages for the rest of the system, it will provide power on reset signals for the microcontroller/DSP.
• The microcontroller/DSP will boot and load its memory from the Flash/EEPROM. Subsequently, the microcontroller/DSP will activate the BT engine.
• If previously paired to a BT master, and this BT master is transmitting, the BT link will be re-established.
• If no automatic connection, a pairing event must be initiated. A pairing is initiated by holding the push button for 5 seconds. Pairing is acknowledged by 3 beeps in the left and right speakers.
Principle diagram for ‘BT Pairing’ use case.
USound GmbH DATA SHEET ⏐IOCASTE Subject to change without notice Version 1.0, 2017-November-06 USound™ www.usound.com
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6.6.2 Turn-off
• The electronics is de-activated via the on/off push button on the right temple. If the system is already active, one short push will initiate the turn off sequence.
• In a battery low scenario, the device will signal to the wearer that battery is low by sounding 3 beeps.
• Once the battery reaches its battery empty state, the electronics will automatically turn off.
7 Button functions
Current status
Button push
Action Sound LED
Off 3–5s Turn on the glasses and reconnect to the last Bluetooth device
Start-up, Reconnect
flashing
Off ≥5s Turn on the glasses and pair with a new Bluetooth device
Start-up; Connect
flashing
Any on-state ≥3s Turn off the glasses Shut-down -
On & receiving a call
≤1s Accept call - -
On & in a call ≤1s End call - -
On & music paused
≤1s Play music - -
On & music playing
≤1s Pause music - -
8 Firmware update Possible over Test-points on the left temple
USound GmbH DATA SHEET ⏐IOCASTE Subject to change without notice Version 1.0, 2017-November-06 USound™ www.usound.com
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USound GmbH (“USound”) makes no warranties for the use of USound products, other than those expressly contained in USound’s applicable General Terms of Sale, located at www.usound.com USound assumes no responsibility for any errors which may have crept into this document, reserves the right to change devices or specifications detailed herein at any time without notice, and does not make any commitment to update the information contained herein.
No license to patents or other intellectual property rights of USound are granted in connection with the sale of USound products, neither expressly nor implicitly.
In respect of the intended use of USound products by customer, customer is solely responsible for observing existing patents and other intellectual property rights of third parties and for obtaining, as the case may be, the necessary licenses.
Important note: The use of USound products as components in medical devices and/or medical applications, including but not limited to, safety and life supporting systems, where malfunctions of such USound products might result in damage to and/or injury or death of persons is expressly prohibited, as USound products are neither destined nor qualified for use as components in such medical devices and/or medical applications. The prohibited use of USound products in such medical devices and/or medical applications is exclusively at eh risk of the customer.
