User's Manual

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Address : 1879 Lundy Ave, ste. 138, San Jose, CA 95131
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地址：天津市华苑产业区海泰西路 18 号西 3B-202（300384）
7
2.6 Pin Assignment
Name Type Pin # Description ALT Function 5V Tolerant Initial State
UART Interface
RXD I 13 Receive data Y
TXD O 14 Transmit data Y
RTS O 12 Request to send (active low) I2C Data Y
CTS I 11 Clear to send (active low) I2C Clock Y
Reserved
BOOT 0 I 9 Reserved
Power and Ground
VIN 8 VIN
GND 7 GND
LDOOUT 18 LDO OUTPUT 1.9V
Reset
RESETN I 10 Reset input (active low for 5 ms) 2.5V max
LPO
LPO I 15 Low power clock input (required)
GPIO – General Purpose Input/Output
GPIO [1] I/O 1 General Purpose Input/Output SPI MISO Y Input pull down
GPIO [2] I/O 2 General Purpose Input/Output
SPI
MOSI/I2S_SD
Y Floating
GPIO [3] I/O 3 General Purpose Input/Output
SPI SCLK/
I2S_SCK
Y Input pull down
GPIO [4] I/O 4 General Purpose Input/Output SPI SS/I2S_WS Y Input pull down
GPIO [5] I/O 5 General Purpose Input/Output I2C Data Y Input pull down
GPIO [6] I/O 6 General Purpose Input/Output I2C Clock Y Input pull down
GPIO [7] I/O 17 General Purpose Input/Output ADC 0 Y Input pull down
GPIO [8] I/O 16 General Purpose Input/Output ADC1 Y Input pull down