ADLINK Technology I-Pi SMARC User Manual page 31

I-Pi-SMARC User's Guide
5.10.2 ESPI
Name Pin Description
#
ESPI_CS0# P54 ESPI1 Master Chip Select 0
ESPI_CS1# P55 ESPI1 Master Chip Select 1
ESPI_CK P56 ESPI Master Clock output
ESPI_RESET# S58 ESPI Reset
ESPI_ALERT0# S43 ESPI ALERT
ESPI_ALERT1# S44
ESPI_IO_0 P58 ESPI Master Data Input /
ESPI_IO_1 P57 Output.
ESPI_IO_2 S56
ESPI_IO_3 S57
Page 24
I/O I/O Power PU /
Type Level Domain PD
O 1.8V Standby
CMOS
O 1.8V Standby
CMOS
O 1.8V Standby
CMOS
O 1.8V Standby
CMOS
I OD 1.8V Standby
CMOS
I/O 1.8V Standby
CMOS
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Comments
Reset the eSPI interface for both master and slaves.
eSPI Reset# is typically driven from eSPI master to eSPI slaves
This pin is used by eSPI slave to request service from eSPI.master.Alert# is
an open-drain output from the slave.
This pin is optional for Single Master-Single Slave configuration where
I/O[1] can be used to signal the Alert event.
ESPI_IO_0 can also be used as SPI1_DO (MOSI)
ESPI_IO_1 can also be used as SPI1_DIN (MISO)
In Single I/O mode, ESPI_IO_0 is the eSPI master output / eSPI slave input
(MOSI) whereas ESPI_IO_1 is the SPI master input / eSPI slave output
(MISO).
SGET SMARC Rev 2.1