Embedian SMARC-iMX8M Series, Руководство пользователя, Страница: 65 / 174

Embedian, Inc.
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SMARC-iMX8M Computer on Module User’s Manual v.1.0
2.1.13 SPI/eSPI Interface
The SMARC‐iMX8M module supports two NXP i.MX8M SPI interfaces that
are available off‐Module for general purpose use. One of them is
implemented as
eSPI interface by SMARC 2.0 definition. Each SPI channel
has two chip‐selects that can connect two SPI slave devices on each channel.
SPI devices will share the " SPI0_DIN ", " SPI0_DO " and " SPI0_CK " pins, but
each device will have its own chip select pin. The chip select signal is a low
active signal.
eSPI devices will share the "E SPI_IO_0 ", " ESPI_IO_1 ",
" ESPI_IO_2 ", " ESPI_IO_3 " and "E SPI_CK " pins, but each device will have its
own chip select pin. The chip select signal is also a low active signal.
The
SPI to CAN bus bridge uses the SPI0 interface with different chip select
signals ( SS2#, SS#3 ).