Neoway N715-EA - USIM Interface Reference Designs

N715-EA Hardware User Guide
Chapter 5 Application Interfaces
Copyright © Neoway Technology Co., Ltd. All rights reserved.
45
kΩ pull-up resistor is
required.
USIM1_CLK
5
DO
USIM1 clock output
-
USIM1_RESET
7
DO
USIM1 reset
-
USIM1_DET
9
DI
USIM1 card plug
detection
1.8 V power domain If
unused, connect this pin to
VDD_1P8 through a 47 kΩ
resistor.
USIM2_VCC
136, 148
PO
USIM2 power output
1.8 V/3.0 V (self-adaptive)
USIM2_RESET
145
DO
USIM2 reset
-
USIM2_DATA
146
B
USIM2 data input and
output
Connect this pin to
USIM2_VCC through a 4.7
kΩ pull-up resistor.
USIM2_CLK
147
DO
USIM2 clock output
-
N715-EA provides 2 USIM card interfaces, self-adaptable to 1.8 V/3.0 V USIM cards, of which the
USIM1 interface supports the hot-swap function. USIM1 is the default USIM interface. Figure 5-20
shows the reference design of the USIM card interface.
There are hardware conflicts between USIM2 interface (pins 145# to 147#) and status indication interface (pins
52# to pin 54#). if you use USIM2 interface, please be sure to leave the status indication interface open; if you
use the status indication interface, leave the USIM2 interface open.
USIM2 is an optional signal, which is configured in the firmware. Therefore, pay attention to the difference in
firmware version. For more information about how to use the USIM2 interface, please contact Neoway FAEs.
Figure 5-19 Reference design of the USIM card interface (normally closed type)
USIM_CLK
USIM_RESET
USIM_VCC
USIM_DET
N715-EA Module
CLK
RST
VCC
R2
R3
R4
20Ω
20Ω
20Ω
1
.
4
5
USIM_DATA
R1 20Ω
DATA
VPP
GND
GND
USIM Card Slot
R5
4.7kΩ
R6
47kΩ
C1
C2
C3 C4
C6
D1
D2
D3
D4
D5
C5
1uF
CD
0.1uF
VDD_1P8