Neoway N723-EA - Network and Connection; Ethernet; Figure 5-28 Reference Design of the I2 C

N723-EA Hardware User Guide
Chapter 5 Application Interfaces
Copyright © Neoway Technology Co., Ltd. All rights reserved.
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Figure 5-28 Reference design of the I2C
Device
(Slave)
N723-EA
(Master)
VDD_1P8
I2C_SDA
I2C_SCL
GND
I2C_SDA
I2C_SCL
GND
4.7KΩ
R1
4.7KΩ
R2
Schematic Design Guidelines:
If the level of the slave device does not match that of the N723-EA, level conversion is required; see
Figure 5-20 Recommended level shifting circuit 1.
PCB Design Guidelines:
⚫
Avoid cross routing between the I2C cable and other signal cables as much as possible. If cross-
routing cannot be avoided, keep the signal cables perpendicular to other cables to reduce
coupling.
⚫
Keep the signal cables away from areas where static electricity may be introduced as much as
possible.
⚫
It is recommended that signal cables be wrapped with left and right ground wires.
5.4 Network and Connection
N723-EA supports Ethernet and Wi-Fi network connection methods.
5.4.1 Ethernet
RMII
Signal
Pin
I/O
Function description
Remarks
RMII_TX_D0
16
DO
Data sending bit 0
Leave this pin floating if it is not used.
RMII_TX_D1
15
DO
Data sending bit 1
Leave this pin floating if it is not used.
RMII_RX_D0
19
DI
Data receiving bit 0
Leave this pin floating if it is not used.
RMII_RX_D1
18
DI
Data receiving bit 1
Leave this pin floating if it is not used.