NXP Semiconductors K32L2B, Начало работы

Страница: 2 / 15

1.3 Reference documents
Table 1. References
Reference Definition
K32L2B Dongle K32L2B USB Dongle with NXH3670
K32L2B Headset
K32L2B Headset with NXH3670
K32L2B OTA
K32L2B Bluetooth LE Audio System OTA operation steps
K32L2B Emulating the I
2
S Bus
Emulating the I
2
S bus master with the FlexIO module
2 Hardware introduction
2.1 System overview
Figure 2 shows the simplified system overview.
Figure 2. Simplified system overview
As shown in Figure 2 , the audio transfer process include the folloiwng steps:
1. The NXH3670 boots up, starts and then communicates with K32L2B through the SPI interface.
2. Assuming NXH3670 can work well after
Step 1 , we use the USB interface to transfer audio stream from PC to host
controller. The 48 KHz USB audio is converted to an I
2
S signal, and then transmitted to NXH3670 of Dongle through the
I
2
S master emulated by FlexIO (
K32L2B Emulating the I 2 S Bus
) .
3. The audio stream can be transmitted to NXH3670 of Headset automatically. Users can hear voices with their headsets.
The current K32L2B Bluetooth LE Audio System includes FRDM-K32L2B board and NxH3670 SDK boards (KL27 Dongle and
Headset board to provide the basic Audio function respectively). This platform can:
• Send audio stream from PC to Headset.
• Receive control signal and recorded audio from Headset to PC.
• Update new firmware through Over The Air (OTA).
NXP Semiconductors
Hardware introduction
Getting Started with NxH3670 Gaming Use Case, Rev. 0, 01/2020
Application Note 2 / 15