Serial Peripheral Interface (Spi); Spi Boot - Kontron COMe-cBTi6R E3845 8GB/16S User Manual

4.6

Serial Peripheral Interface (SPI)

The Serial Peripheral Interface Bus or SPI bus is a synchronous serial data link standard named by Motorola that operates
in full duplex mode. 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. Sometimes SPI is called a "four wire"
serial bus, contrasting with three, two, and one wire serial buses.
4.7

SPI boot

The COMe-cBTi6R supports boot from an external SPI Flash. It can be configured by pin A34 (BIOS_DIS#0) and pin B88
(BIOS_DIS1#) in following configuration:
BIOS_DIS0#
open
GND
open
GND
Recommended SPI boot flash types for 8-SOIC package
Size
16Mbit
16Mbit
16Mbit
16Mbit
16Mbit
16Mbit
16Mbit
16Mbit
16Mbit
Size
32Mbit
32Mbit
32Mbit
32Mbit
32Mbit
32Mbit
32Mbit
Size
64Mbit
64Mbit
64Mbit
64Mbit
64Mbit
64Mbit
64Mbit
64Mbit
64Mbit
64Mbit
34
Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com.
Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from
The SPI interface can only be used with a SPI flash device to boot from external BIOS on the
baseboard.
BIOS_DIS1#
open
open
GND
GND
By default only SPI Boot Device 1 is used in configuration 3 & 4. Both SPI Boot Devices are
used by splitting the BIOS with modified descriptor table in customized versions only
Manufacturer
Atmel
Atmel
Atmel
Atmel
Macronix
Macronix
SST/Microchip
Winbond
Winbond
Manufacturer
Atmel
Atmel
Macronix
Macronix
SST/Microchip
Winbond
Winbond
Manufacturer
Atmel
Atmel
Macronix
Macronix
Macronix
SST/Microchip
Winbond
Winbond
Winbond
Winbond
COMe-cBTi6R / Features and Interfaces
Function
Boot on-module BIOS
Boot baseboard LPC FWH
Baseboard SPI = Boot Device 1, on-module SPI = Boot
Device 2
Baseboard SPI = Boot Device 2, on-module SPI = Boot
Device 1
Part Number
AT26DF161
AT26DF161A
AT25DF161
AT25DQ161
MX25L1605A(D)(36E)(06E)
MX25L1635D
SST25VF016B
W25X16BV
W25Q16BV(CV)
Part Number
AT25/26DF321
AT25DF321A
MX25L3205A(D)(06E)
MX25L3225D(35D)(36D)
SST25VF032B
W25X32BV
W25Q32BV,
Part Number
AT25DF641(A)
AT25DQ641
MX25L6405D(45E)(36E)(06E)(73E)
MX25L6455E
MX25U6435F
SST25VF064C
W25X64BV
W25Q64BV(CV)(FV)
W25Q64DW
W25Q64FW
Device ID
0x1F4600
0x1F4601
0x1F4602
0x1F8600
0xC22015
0xC22415
0xBF2541
0xEF3015
0xEF4015
Device ID
0x1F4700
0x1F4701
0xC22016
0xC25E16
0XBF254A
0xEF3016
0xEF4016
Device ID
0x1F4800
0x1F8800
0xC22017
0xC22617
0xC22537
0xBF254B
0xEF3017
0xEF4017
0XEF6017
0XEF6017