ADLINK LEC-BTS - Manual (Page 13)

Interfaces 9
LEC-BTS
3.10 SPI
The CPU implements an SPI controller, which supports two SPI Flash devices on the module for
BIOS storage.
3.11 Serial (UART)
The LEC-BTS provides three serial interfaces: Two ports are high-speed, 4-wire ports (with TX/
RX and RTS#/CTS#), and one port is 2-wire (with TX/RX only.)
3.12 I2S
The SMARC connector provides three pins for an LPE_I2S audio interface. The LPE_I2S inter-
face is brought out through the I2S0 pins on the SMARC connector.
3.13 SD/SDIO Interface
Four parallel data lines comprise the SD/SDIO interface, supporting SD Card sockets.
3.14 eMMC Interface
The LEC-BTS provides one 8-bit eMMC interface port, brought out from the CPU through the
SDMMC pins on the SMARC connector.
3.15 GPIO
The LEC-BTS provides 12 GPIO signals from the CMOS device on the module. The GPIO sig-
nals can be utilized for General Purpose IOs as well as camera, HDA, PWM, TACH, and CAN
interfaces.
3.16 LPC Debug
A 40-pin, front flip, DB40 connector allows access to debug and update the BIOS, BMC, and OS
code on the module. (Refer to “Debug (DB40)” on page 13.)
Table 3-1: GPIO Default Settings
SMARC Connector Pin Default Function
GPIO0 CAM0_PWR#
GPIO1 CAM1_PWR#
GPIO2 CAM0_RST#
GPIO3 CAM1_RST#
GPIO4 HDA_RST#
GPIO5 GPIO
GPIO6 GPIO
GPIO7 GPIO
GPIO8 GPIO
GPIO9 GPIO
GPIO10 GPIO
GPIO11 GPIO