Specifications

Cinterion
®
EXS62-W/EXS82-W Hardware Interface Description
2.1 Application Interface
61
t EXS62-W_EXS82-W_HID_v01.200ee 2022-09-07
Public/ Released
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2.1.10 SPI Interface
The embedded processing option of EXSx2-W provides an SPI interface where four GPIO in-
terface lines can be configured as Serial Peripheral Interface (SPI). The SPI is a synchronous
serial interface allowing the module to control external sensors or components. The SPI inter-
face supports only master mode. The transmission rates are up to 6.5Mbit/s. The SPI interface
comprises the two data lines MOSI and MISO, the clock line SPI_CLK a well as the chip select
line SPI_CS.
The GPIO lines are also shared with the ASC1 signal lines as shown in Section 2.1.8.
The SPI interface can be configured and activated via embedded application. For more infor-
mation see [10].
In general, SPI supports four operation modes. The modes are different in clock phase and
clock polarity. The module’s SPI mode can be configured via embedded processing option.
Make sure the module and the connected slave device works with the same SPI mode.
Figure 18 shows the characteristics of the four SPI modes. The SPI modes 0 and 3 are the most
common used modes. For electrical characteristics please refer to Table 2.
Figure 18: Characteristics of SPI modes
SPI MODE 0 SPI MODE 1
SPI MODE 2 SPI MODE 3
Clock phase
Clock polarity
SPI_CS
MOSI
SPI_CLK
MISO
SPI_CS
MOSI
SPI_CLK
MISO
SPI_CS
MOSI
SPI_CLK
MISO
SPI_CS
MOSI
SPI_CLK
MISO
Sample Sample
Sample Sample