Smart LTE Module Series
Smart EVB User Guide
Smart_ EVB_User_Guide
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ESD
33pF
ESD
ESD
ESD
33pF
33pF
33pF
100pF
100pF
MIC1_P
MIC1_N
EAR_P
EAR_N
FB
EVB
M
IC
_
B
IA
S
U701 MIC
Earphone
Figure 21: Reference Circuit Design for Microphone and Earphone Interfaces
3.8. (U)SIM Interfaces (J503/J504)
The Smart EVB provides the following two (U)SIM card (2.95V or 1.8V) connectors:
⚫
J503: (U)SIM1 card connector
⚫
J504: (U)SIM2 card connector
The following figure shows the simplified interface schematic for J503.
(U)SIM card connector
USIM_GND
USIM_CLK
USIM_ DATA
USIM_ RST
USIM_GND
EVB
J503
C7
C2
C3
Push-Push
USIM_VDD
USIM_DATA
USIM_RST
USIM_CLK
USIM_ PRE
GND
USIM_DETECT
CD2
CD1
USIM_VPP
C6
USIM _VDD
C1
C5
GND
Figure 22: Simplified Interface Schematic for (U)SIM1 Card Connector (J503)