Neoway N723-EA - Page 21

N723-EA Hardware User Guide
Chapter 4 Module Pins
Copyright © Neoway Technology Co., Ltd. All rights reserved.
21
RMII_RX_D1
18
DI
Data receiving bit 1
P4
Leave this pin floating if it is not used.
RMII_CLK
21
DI
Data clock
P4
Leave this pin floating if it is not used.
RMII_RX_DV
24
DI
Valid when receiving data
P4
Leave this pin floating if it is not used.
RMII_TX_EN
25
DO
Enable data sending
P4
Leave this pin floating if it is not used.
RMII_INT_N
90
DI
Interrupt input
P4
Leave this pin floating if it is not used.
RMII_RST_N
78
DO
Reset signal output
P3
Leave this pin floating if it is not used.
MDIO
MDIO_CLK
22
DO
MDIO clock
P4
Leave this pin floating if it is not used.
MDIO_DATA
23
B
MDIO data
P4
Connecting a 4.7 kΩ external pull-up resistor
is required.
Leave this pin floating if it is not used.
USIM Interface
USIM_VCC
35
PO
USIM power output
P1
Iomax=50 mA.
USIM_DATA
36
B
USIM data input and
output
P1
Connecting a 4.7 kΩ pull-up resistor to
USIM_VCC is required.
USIM_CLK
37
DO
USIM clock output
P1
Leave this pin floating if it is not used.
USIM_RESET
38
DO
USIM reset
P1
Leave this pin floating if it is not used.
USIM_DET
39
DI
USIM detection
P3
It is recommended to connect this pin to
VDD_1P8 through a 47 kΩ pull-up resistor if
it is not used.
USB Interface
USB_VBUS
40
PI
Voltage detection
3.5 V to 5.2
V, typical
value: 5.0 V
Used for software download and data
transmission. DM and DP adopt differential
routing, and the differential impedance must