NXP Semiconductors K32L2B, Getting Started, Page: 3 / 15

Figure 3. K32L2B Bluetooth LE audio system hardware
As shown in Figure 3 ,
• In the Dongle part, the host controller is K32L2B and the Bluetooth LE device is NXH3670 on KL27 Dongle board. K32L2B
configures and communicates with NXH3670 through the SPI interface. K32L2B transfers audio data to NXH3670 through
the I
2
S bus emulated by FlexIO.
• In the Headset part, the host controller is K32L2B and the Bluetooth LE device is NXH3670 on KL27 Headset board.
K32L2B configures and communicates with NXH3670 through the SPI interface and configures CODEC using the I
2
C
interface.
2.2 K32L2B Dongle
This section describes the current hardware design of K32L2B Dongle based on FRDM-K32L2B and KL27 Dongle board. Figure
4 shows the components and interfaces.
NXP Semiconductors
Hardware introduction
Getting Started with NxH3670 Gaming Use Case, Rev. 0, 01/2020
Application Note 3 / 15