Neoway N75 - Control Interfaces; Pwrkey_N; Figure 3-6 Reference Design of Startup Controlled by Button; Table 3-1 VDD_1 P8 Electrical Features

N75
Hardware User Guide
Copyright © Neoway Technology Co., Ltd
19
protector should be added.
Table 3-1 VDD_1P8 electrical features
Parameter
Minimum
Typical
Maximum
Remarks
Output Voltage
1.76V
1.8V
1.84V
Temperature range: -40°C ~ +85°C
Output Current
50 mA
Do not use this pin to load any components.
3.2 Control Interfaces
Signal
Pin
I/O
Function
Remarks
RESET_N
32
DI
Module reset input
Reset at low level
PWRKEY_N
33
DI
ON/OFF button
Triggered by low level (recommended)
N750 provides PWRKEY_N and RESET_N to power up and reset the module respectively.
3.2.1 PWRKEY_N
N75 allows startup by the following controls:
⚫
Button
⚫
MCU
The values of R1 and R2 are determined by the IO domain of MCU. The voltage across the base
of the triode should not exceed 1.8V.
⚫
Automatic startup after powered up
Figure 3-6 Reference design of startup controlled by button
ESD
N75
module
PWRKEY_N
S1
R1
1kΩ