Neoway N723-EA - Page 18

N723-EA Hardware User Guide
Chapter 4 Module Pins
Copyright © Neoway Technology Co., Ltd. All rights reserved.
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IL DD_P20.3V ~ 0.3 VV - =
OH(Min) DD_P2 0.2VV V -=
OL(Max) 0.2VV =
3.0V level feature:
IH DD_P22.0V ~ 0.3VVV=+
IL 0.3V ~ 0.8V - V=
OH(Min) 2.4VV =
OL(Max) 0.4VV =
GPIO
P3
1.8 V
digital IO
1.8 V power
Input:
IH DD_P3 DD_P30.7 V ~ V 0.2VV =  +
IL DD_P30.3V ~ 0.3 VV - =
Output:
OH(Min) DD_P3 0.2VV V -=
OL(Max) 0.2VV =
RMII
P4
RMII
interface
1.8 V or 3.3 V
1.8 V level feature:
IH DD_P4 DD_P40.7 V ~ V 0.2VV =  +
IL DD_P40.3V ~ 0.3 VV - =
OH(Min) DD_P4 0.2VV V -=
OL(Max) 0.2VV =
3.3V level feature:
IH DD_P42.0V ~ 0.3VVV=+
IL 0.3V ~ 0.8V - V=
OH(Min) 2.4VV =
OL(Max) 0.4VV =
⚫ If you need to use the PCM/I2S or RMII function, contact Neoway FAEs.
⚫ The power domains of PWRKEY_N is VBAT, and direct connection of GPIOs in different power
domains is prohibited, as that will result in voltage backflow.
⚫ RMII only supports 1.8 V level by default. If supporting 3.3 V level is required, ensure that the
hardware supports it.
⚫ SD/eMMC supports 1.8 V level by default. If supporting 3.0 V level is required, the firmware should
be configured; ensure whether it is configured before using the pin.
⚫ The GPIO interface is equipped with the interrupt function. If you need to use the interrupt function,
contact Neoway FAE; otherwise, the software interrupt priority may be abnormal and unpredictable
risks may arise when the module is running.