User Manual

Phone: [phone] | Fax: [phone] | E-mail: [e-mail]
Address : 1879 Lundy Ave, ste. 138, San Jose, CA 95131
电话：[phone] | 传真：[phone] 转 111 | E-mail: [e-mail]
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
8
Receive data
Y
TXD
O
6
Transmit data
Y
CTS
I
9
Clear to send (active low)
Y
RT S
O
10
Request to send (active low)
Y
Boot Loader
Boot 0
I
2
Reserved
Power and Ground
V
DD
22
V
DD
GND
21
GND
Reset
RESETN
I
3
Reset input (active low for 5 ms);
3.3V max
GPIO – General Purpose Input/Output
GPIO [0]
I/O
16
General Purpose Input/Output
SPI MISO
Y
Input pull down
GPIO [1]
I/O
17
General Purpose Input/Output
SPI MOSI
Y
Push-pull
GPIO [2]
I/O
18
General Purpose Input/Output
SPI SS
Y
Floating
GPIO [3]
I/O
1
General Purpose Input/Output
SPI CLK
Y
Input pull down
GPIO [4]
I/O
20
General Purpose Input/Output
ADC 0
3.3V max
Input pull down
GPIO [5]
I/O
11
General Purpose Input/Output
I2C SCL
Y
Input pull down
GPIO [6]
I/O
12
General Purpose Input/Output
I2C SDA
Y
Input pull up
GPIO [7]
I/O
13
General Purpose Input/Output
Y
Input pull up
GPIO [8]
I/O
4
General Purpose Input/Output
DAC 0
3.3V max
Input pull up
GPIO [9]
I/O
7
General Purpose Input/Output
DAC 1
3.3V max
Input pull up
GPIO [10]
I/O
5
General Purpose Input/Output
ADC 1
3.3V max
Input pull up
GPIO [11]
I/O
14
General Purpose Input/Output
OSC IN
Y
Input pull up
GPIO [12]
I/O
15
General Purpose Input/Output
OSC OUT
Y
Input pull up
LPO
LP O
I/O
19
LPO Inpu t
3.3V max