Dragino MS14, Development Instruction, Page: 8 / 10

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ms14 development instruction
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3.2 Connectors and Pins
3.2.1 Connector Map
Connector PIN Description
2 x 8 ROUTER CON
VDD33 3.3 V power output
VDD5_LDO 5V power output
COLD_RESET COLD_RESET
GND GND
GPIO20 GPIO20, SLIC_FS_IN, I2S_SD
GPIO19 GPIO19, SLIC_FS_OUT, I2S_WS
GPIO22 GPIO22, SLIC_DATA_IN, I2S_MICIN
GPIO21 GPIO21, SLIC_DATA_OUT, I2S_MCK
GPIO23 GPIO23, SPDIF_OUT
GPIO18 GPIO18, SLIC_CLK, I2S_CK
GND GND
GPIO24 GPIO24
UART_RX UART_RX
UART_TX UART_TX
RAW_VCC Connect to POWER Input net
SENSOR_LED Connect to SENSOR_LED, active LOW
2 x 7 ROUTER CON POS1 ~ POS12 To Sensor OUT screw terminal. With 5V ESD protect
2 x 5 JTAG CON
GPIO26 GPIO26
GPIO27 GPIO27
JTAG_TMS JTAG_TMS
JTAG_TCK JTAG_TCK
JTAG_TDI JTAG_TDI
JTAG_TDO JTAG_TDO
GPIO15 GPIO15
GPIO16 GPIO16
3.2.2 COLD_RESET pin
MS14 has a COLD_RESET pin which can reset itself via hardware. This can be used for hardware
watchdog to reset the ms14 in case there is software issue.
The COLD_RESET pin is in the 2x8 connector and active level of this pin is low . Since MS14
already has a pull up resistor for this pin. In the daughter board design, developer only needs to
connect the IO pins from MCU to this COLD_RESET pin directly and control it via daughter board.