Technical Description
miriac MPX-LX2160A User Manual
V1.4
34/73
© MicroSys Electronics GmbH 2020
4.9
Boot Mode Configuration
The MPX-LX2160A module offers the option of booting from different boot devices.
As previously mentioned, the boot source selection to the SoC is handled by the
CPLD.
The boot source can be selected by means of following pins:
Module Connector
Pin
Signal
I/O Range
Signal conditioning
ST2: A4
BOOT_SRC_SEL 0
3,3V
CPLD(PU)
ST2: A3
BOOT_SRC_SEL 1
3,3V
CPLD(PU)
ST2: A2
BOOT_SRC_SEL 2
3,3V
CPLD(PU)
ST2: A1
BOOT_SRC_SEL 3
3,3V
CPLD(PU)
Table 4-7 Boot select pins: pin assignments
Currently, five different boot devices are possible depending on
BOOT_SRC_SEL[3:0] as defined below:
SEL3
SEL2
SEL1
SEL0
Boot Source
Description
0xF
1
1
1
1
Flex-SPI Serial-NOR A
default
0xE
1
1
1
0
I²C EEPROM
0xD
0x9
0x5
0x1
X
X
0
1
SD Card
0xB
1
0
1
1
eMMC
0x7
0
1
1
1
Flex-SPI Serial-NOR B
Second NOR Flash
0xC
0xA
0x8
0x6
0x4
0x3
0x2
0x0
1
1
1
0
0
0
0
0
1
0
0
1
1
0
0
0
0
1
0
1
0
1
1
0
0
0
0
0
0
1
0
0
Reserved for future use.
(Currently selects SD
Card)
(All remaining settings)
Table 4-8 Boot devices: overview
The reserved settings are currently set to SD Card and can change in future
configurations.
