Sdio (Option); Serial Peripheral Interface (Spi); Spi Boot; Table 16: Spi Boot Pin Configuration - Kontron COMe-cEL6 User Manual

3.11. SDIO (option)

The SDIO feature is supported using the processor. To find out more about SDIO, contact Kontron Support.

3.12. Serial Peripheral Interface (SPI)

The Serial Peripheral Interface (SPI) bus is a synchronous serial data link where devices communicate in master/slave
mode, where the master device initiates the data frame. Multiple slave devices are allowed with individual slave
select (chip select) lines.
The SPI interface may only be used with a SPI Flash device to boot from the external BIOS on
the carrier board.
General purpose SPI connected to COMe instead of boot SPI requires a hardware
modification in the form of additional resistors and is implemented on request only.

3.12.1. SPI Boot

The SPI Flash chip stores the BIOS to be booted. The COMe-cEL6 supports SPI boot from the 32 MByte SPI Flash chip
on the module and the external 32 MByte SPI Flash chip on the carrier board. The pins A34 (BIOS_DIS0#) and pin B88
(BIOS_DIS1#) select the SPI Flash boot source, see Table 16: SPI Boot Pin Configuration.
The SPI flash chip on the carrier is required to be 32MByte (256MBit).

Table 16: SPI Boot Pin Configuration

BIOS_DIS0# BIOS_DIS1#
Open Open
Open GND
The BIOS cannot be split between two chips. Booting takes place either from the module SPI
Flash chip or from the carrier board SPI Flash chip.

Table 17: Supported SPI Boot Flash Types for 8-WSOIC Package

Size
32MB
32MB
32MB
32MB
www.kontron.com
Boot Bus
SPI
SPI
Manufacturer
Winbond
Macronix
Micron
Cypress
Function
Boot on on-module SPI
Boot on carrier board SPI
Part Number
W25Q256JV
MX25L25645GZ2I
MT25QL256ABA1EW9-0SIT
S25FL256LAGNFI010
COMe-cEL6 - User Guide, Rev.1.2
Device ID
EFh / 40h / 19h
C2h / 20h / 19h
20h / BA / 19h
01h / 60h / 19h
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