User's Manual

LE910 V2 HARDWARE USER GUIDE 1VV0301200 Rev.2 Preliminary • 2015-08-04 42 of 81
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5.5.2 SPI
The LE910 V2 Module is provided by one SPI interface. The SPI interface defines two handshake lines for flow
control and mutual wake-up of the modem and the Application Processor: SRDY (slave ready) and MRDY (master
ready). The AP has the master role, that is, it supplies the clock.
The following table is listing the available signals:
PAD
Signal
I/O
Function
Type
NOTE
D15
SPI_MOSI
I
SPI MOSI
CMOS 1.8V
Shared with TX_AUX
E15
SPI_MISO
O
SPI MISO
CMOS 1.8V
Shared with RX_AUX
F15
SPI_CLK
I
SPI Clock
CMOS 1.8V
H15
SPI_MRDY
I
SPI_MRDY
CMOS 1.8V
J15
SPI_SRDY
O
SPI_SRDY
CMOS 1.8V
NOTE:
Due to the shared functions, when the SPI port is used, it is not possible to use the
AUX_UART port.
5.5.2.1 SPI Connections
SPI_MISO
SPI_MOSI
SPI_CLK
SPI_MRDY
SPI_SRDY
E15
D15
F15
H15
J15
LE910 V2
AP