Neoway N75 - Page 18

N75
Hardware User Guide
Copyright © Neoway Technology Co., Ltd
8
PWRKEY_N
33
DI
ON/OFF button
(recommended)
P3
Triggered by low
level
Embedded with
diode switch and a
200 kΩ pull-up
resistor
Around 0.8V when
the pin is floating
UART Interface
UART5_TXD
46
DO
UART5 data transmitting
P3
Used for data
transmission.
Leave them
floating if they are
not used.
UART5_RXD
47
DI
UART5 data receiving
P3
USIM interface
USIM1_VCC
35
PO
USIM1 power output
P1 I
max
=50mA
The module is
compatible with
1.8V and 2.85V
USIM cards.
Connect DATA pin
to USIM_VCC
through a 10 kΩ
pull-up resistor.
Leave them
floating if they are
not used.
USIM1_DATA
36
IO
USIM data IO
P1
USIM1_CLK
37
DO
USIM1 clock output
P1
USIM1_RESET
38
DO
USIM1 reset
P1
USIM1_DET
39
DI
USIM1 detect
P3
USB interface
VBUS
40
PI
Charging voltage check
3.3V to 5.2V,
TYP: 5V
In compliance with
USB2.0 protocol
Used for firmware
download and data
transmission.
USB_DM
41
AIO
USB data minus
USB_DP
42
AIO
USB data plus
USB_ID
43
AI
OTG detect
Leave this pin
floating if it is not
used.
ADC interface
ADC2
88
AI
Analog-to-digital signal
conversion
V
max
=1.7V;
V
min
=0.1V
15-bit, detectable
voltage ranging
from 0.1V to 1.7V
Leave this pin