User's Guide

LE920A4 HW User Guide Module Connections
Doc#: 1VV0301261 Pin-out
Rev. 4.7.1 Page 25 of 124 2019-11-21
PAD Signal I/O Function Type Comment
LTE-WiFi Coexistence
AS3 WCI_TX O
Wireless coexistence interface
TXD
1.8V
AT2 WCI_RX I
Wireless coexistence interface
RXD
1.8V
SIM Card Interface 1
A10 SIMCLK1 O External SIM 1 signal – Clock 1.8/2.85V
B11 SIMRST1 O External SIM 1 signal – Reset 1.8/2.85V
B9 SIMIO1 I/O External SIM 1 signal - Data I/O 1.8/2.85V
Internally PU
10kΩ to
SIMVCC1
B7 SIMIN1 I External SIM1 signal - Presence 1.8V Active low
A8 SIMVCC1 - External SIM1 signal – power
supply for SIM1
1.8/2.85V
E8 Reserved for
ESIM_RST
I Reserved for eSIM signal – Reset 1.8/2.85V Reserved
SIM Card Interface 2
C16 SIMCLK2 O External SIM 2 signal – Clock 1.8/2.85V
D17 SIMRST2 O External SIM 2 signal – Reset 1.8/2.85V
E16 SIMIO2 I/O External SIM 2 signal – Data I/O 1.8/2.85V Internally PU
10kΩ to
SIMVCC2
C18 SIMIN2 I External SIM 2 signal – Presence 1.8V Active low
D15 SIMVCC2 - External SIM2 signal – Power
supply for SIM2
1.8/2.85V
Analog Audio interface
B5 EAR1_MT+ AO Earphone signal output1, phase + Audio
A4 EAR1_MT- AO Earphone signal output1, phase - Audio
B3 MIC1_MT+ AI Mic signal input1, phase + Audio
A2 MIC1_MT- AI Mic signal input1, phase - Audio
G6 MICBIAS AO Mic BIAS Audio
E2 EAR2_MT+ AO Earphone signal output2, phase + Audio