Hangzhou Tuya Inc.
NM1 Module Hardware Design Manual
https://www.tuya.com
Page 13 of 29
Pin No. Analog Signal
Definition
Pin Attribute
Input/
Output
Pin Voltage (V)
Remarks
21
USB_DP
USB+ signal
N/A
N/A
N/A
22
USB_DM
USB– signal
N/A
N/A
N/A
23
USB_EINT
USB_EINT
N/A
24
VIO18_EXT
1.8 V output power (In
PSM mode, no voltage is
output.)
O
Vmin = 1.53 V
Vnorm = 1.8 V
N/A
25
DVDD_IO
NC
NC
NC
N/A
26
NC
NC
N/A
N/A
N/A
27
GND
GND
N/A
N/A
N/A
28
UART1_RXD
Auxiliary serial interface
that receives data
I
1.8
N/A
29
UART1_TXD
Auxiliary serial interface
that transmits data
O
1.8
N/A
30
UART1_CTS
Determines whether data
is received.
N/A
1.8
N/A
31
UART1_RTS
Determines whether data
is transmitted.
N/A
1.8
N/A
32
I2C0_SDA
I
2
C0 data
I/O
N/A
N/A
33
I2C0_SCL
I
2
C0 clock
O
N/A
N/A
34
GND
GND
N/A
N/A
N/A
35
RF_ANT
RF antenna
Characteristic impedance of 50 ohms
36
GND
GND
N/A
N/A
N/A
37
GND
GND
N/A
N/A
N/A
38
RXD_DBG
Debugging serial
interface that receives
data
I
1.8
N/A
39
TXD_DBG
Debugging serial
interface that transmits
data
O
1.8
N/A
40
GND
GND
N/A
N/A
N/A
41
GND
GND
N/A
N/A
N/A
42
VSYS_BB
Input power
I
Vmin = 2.1 V
Vnorm = 3.3 V
Vmax = 3.63 V
N/A
43
VBAT_BOOST
Input power
I
Vmin = 2.1 V
Vnorm = 3.3 V
Vmax = 3.63 V
N/A
