User's Manual
LE920 Hardware User Guide
1vv0301026 Rev.8 2015-01-03
Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights
Reserved. Page 21 of 88
3. LE920 Module Connections
3.1. PIN-OUT
PAD
Signal
I/O
Function
Type
COMMENT
USB HS 2.0 Communication Port
D19
USB_D+
I/O
USB differential Data(+)
F19
USB_D-
I/O
USB differential Data(-)
A18
USB_VBUS
AI
Power sense for the internal USB transceiver
Power
2.2V – 5.25V
@ max 5mA
Asynchronous UART – Prog. / data +HW Flow Control
AH19
C103/TXD
I
Serial data input (TXD) from DTE
1.8V
AF19
C104/RXD
O
Serial data output to DTE
1.8V
AC18
C108/DTR
I
Input for Data terminal ready signal (DTR) from DTE
1.8V
AA18
C105/RTS
I
Input for Request to send signal (RTS) from DTE
1.8V
AK19
C106/CTS
O
Output for Clear to send signal (CTS) to DTE
1.8V
AE18
C109/DCD
O
Output for Data carrier detect signal (DCD) to DTE
1.8V
AG18
C107/DSR
O
Output for Data set ready signal (DSR) to DTE
1.8V
AJ18
C125/RING
O
Output for Ring indicator signal (RI) to DTE
1.8V
Asynchronous Auxiliary UART
AB19
TXD_AUX
O
Auxiliary UART (TX Data to DTE)
1.8V
AD19
RXD_AUX
I
Auxiliary UART (RX Data from DTE)
1.8V
SPI – Serial Peripheral Interface
P19
SPI_CLK
O
SPI Clock output
1.8V
M19
SPI_MISO
I
SPI data Master Input Slave output
1.8V
K19
SPI_MOSI
O
SPI data Master Output Slave input
1.8V
N18
SPI_CS
O
SPI Chip select output
1.8V
SDIO – Secure Digital I/O
AH17
SD/MMC_CMD
O
SD Command
1.8/2.95V
AD17
SD/MMC_CLK
O
SD Card Clock
1.8/2.95V
Y17
SD/MMC_DATA0
I/O
SD Serial Data 0
1.8/2.95V
AF17
SD/MMC_DATA1
I/O
SD Serial Data 1
1.8/2.95V
AB17
SD/MMC_DATA2
I/O
SD Serial Data 2
1.8/2.95V
W17
SD/MMC_DATA3
I/O
SD Serial Data 3
1.8/2.95V
U17
SD/MMC_CD
I
SD card detect input
1.8V
Active Low
Wi-Fi (SDIO) control Interface
AB3
WiFi_SD_CMD
O
Wi-Fi SD Command
1.8V
AM3
WiFi_SD_CLK
O
Wi-Fi SD Clock
1.8V
AD3
WiFi_SD _DATA0
I/O
Wi-Fi SD Serial Data 0
1.8V
AF3
WiFi_SD _DATA1
I/O
Wi-Fi SD Serial Data 1
1.8V