Hardware Interfaces Board Interface Specification EXT-iCore-3576Q38 V0.2 interfaces include: 1 x USB3.0 OTG(Type-C) 1 x USB2.0 (One Of 24Pin On Extension interface) 1 x MIPI-DPHY-CSI 1 x TF Card 1 x WIFI 1 x Bluetooth 1 x Ethernet(up to 100Mbps) 1 × Mic Input(2P-1.25mm) 1 × Speaker Out(4P-1.25mm) 1 x RS485 1 x TTL (One Of 24Pin On Extension interface) 1 x RTC battery (4P-1.25mm) The details are shown below: Special Notice EXT-iCore-3576Q38 Bluetooth not support PCM . Please refer to the iCore-3576Q38 specification for all interfaces.