Neoway N75 - Table 2-2 Pin Description

N75
Hardware User Guide
Copyright © Neoway Technology Co., Ltd
7
P7
GPIO of PM chipset can be
divided into three types: 1.2V,
1.8V, and VBAT. They are
used for output because their
IO cannot adapt automatically.
V
IH
=0.65*V
IO
~(V
IO
+0.3V),
V
IL
=-0.3V~0.35*V
IO
V
OH
=(V
IO
-0.45)V~V
IO
V
OL
=0V~0.45V
(V
IO
is GPIO voltage, 1.2V/1.8V/VBAT)
When V
IO
is 1.8V
High: 0.9mA
Medium: 0.6mA
Low: 0.15 mA
P8
Level of GPIO for power
management chipset, fixed to
1.8V
V
IH
=1.26V~2.1V
V
IL
=-0.3V~0.63V
V
OH
=1.35V~1.8V
V
OL
=0V~0.45V
High: 0.9mA
Medium: 0.6mA
Low: 0.15 mA
Table 2-2 Pin Description
Signal
Pin
I/O
Function
Level
Feature
Remarks
Power Interface
VBAT
27, 28,
29
PI
Main power supply input
V
max
=4.3V
Supply at most 2A
DVDD_1P8
45
PO
1.8V power output
V
norm
=1.8V
I
max
=50mA
Used only for level
shifting.
Leave this pin
floating if it is not
used.
DVDD_XO_1P8
53
PO
1.8V power output
V
norm
=1.8V
I
max
=20mA
Used to pull up the
crystal oscillator of
external WLAN
module
Leave this pin
floating if it is not
used.
GND
1, 14, 17, 20, 26,
30, 31, 44, 49,
74, 75, 77, 91,
93, 95, 97, 98,
99, 100
Ground
Connect all GND
pins to the ground
plane.
Control Interfaces
RESET_N
32
DI
Module reset input
P3
Triggered by low
level to reset the
module.