Table 16. Audio codec, audio jacks, and audio expansion connector
Part identifier
Manufacturing part number
Description
U13
WM8904
Audio codec. It receives analog audio from J5 jack, encodes it as
digital signals, decodes digital signals back to analog audio, and
sends it to J6 jack.
J5
SJ-3524-SMT
Audio input jack. It receives audio data from an external audio
source and sends it to audio codec.
J6
Audio output (headphone output) jack. It sends out audio data
received from audio codec.
J44
TMM-112-01-G-D
2x12 pin header for connecting an external audio device
Two jumpers (JP19 and JP18) are provided for testing digital audio input/output to/from audio codec. JP19 is used to enable/
disable digital audio input to audio codec. JP18 is used to enable/disable digital audio output from audio codec.
2.7 HS SPI interface
The target MCU has a high-speed SPI (HS SPI) controller, which is accessible through its Flexcomm 8 module. The HS SPI
controller can act as a SPI master or slave. It supports up to four SPI slave select inputs/outputs (SS0-SS3). In the LPC55S36-EVK
board, the HS SPI connections are supported through slave selects 0, 1, and 3.
The figure below shows the HS SPI diagram of the LPC55S36-EVK board.
LPC5536
MCU-Link
SPI NOR flash
Voltage
translator
Motor 2 +
Arduino socket
connector J92
FC8
mikroBUS socket
connector J7
Target side
Slave
Debugger side
Master
Slave select 0
Master
Slave
Slave select 3
Master
Slave
Slave select 1
Master/
slave
Slave
Figure 9. HS SPI diagram
The table below describes the HS SPI connections on the LPC55S36-EVK board.
NXP Semiconductors
LPC55S36-EVK Functional Description
LPC55S36-EVK Board User Manual, Rev. 1, 24 January 2022
User Manual
33 / 49