3: Open-Q 660 µSOM Development Kit
Open-Q™ 660 µSOM Dev Kit User Guide
35
Please refer to the schematic and consider the power before connecting anything to this header. For more
details regarding configuration, refer to the Open-Q 660 Software Release Notes to determine feature support
in the latest software release.
3.7.17
Audio Inputs Expansion Header J1900 (33)
The Open-Q 660 µSOM Development Kit Audio subsystem is built around the Qualcomm Audio Codec
WCD9335. There are a few headers that expose capabilities of WCD9335 for the user. The Audio Inputs
Expansion Header J1900 (33) provides signals to handle up to six microphones.
Figure 20. Audio Inputs Expansion Header J1900 (33)
19 LPI_GPIO_8_SPI_1_C
S_N
Low Power APQ GPIO
8, SPI1 Chip Select Neg.
20 LPI_GPIO_10_SPI_1_
MOSI
Low Power APQ GPIO
10, SPI1 Master Output
21 LPI_GPIO_9_SPI_1_C
LK
Low Power APQ GPIO
9, SPI1 Clock
22 LPI_GPIO_11_SPI_1_
MISO
Low Power APQ GPIO
11, SPI1 Master Input
23 No Net
24 LPI_GPIO_1_PWR_E
N
Low Power APQ GPIO
1, Power Enable
