hilscher NXHX 4000-JTAG+, Описание устройства

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2.3 Operating elements
2.3.1 S300 - DIP switches for selecting boot mode and PLL clock speed
For identifying the switches on the board, see position (1) in section
Positions of interfaces and operating elements [
}
page 12].
These switches allow you to:
·
select the boot mode
– select the standard boot mode
– enable the console mode
– enable the alternative boot mode
·
set the PLL clock speed for the Dual Cortex-A9 to either 400 MHz or
600 MHz
Boot mode
The ROM Code of the netX 4000 features an integrated bootloader that
automatically recognizes the selected boot mode and the initial state of the
device after reset.
The user can select a certain boot sequence option by setting the switches
No 1, No 2 and No 3 of
S300 accordingly (see table S300 boot sequence
configuration [
}
page 16]).
Example : If boot sequence option 1 is selected, the ROM resident
bootloader searches for a bootable image in the SQI Flash. If no image is
found, the bootloader continues its search according to the sequence. If the
loader cannot find any image in the sources, it automatically enters the
console mode to enable the initial provisioning of a firmware.
Standard boot mode
In standard boot mode, the ROM resident bootloader searches for a
“standard” bootable firmware image in the boot sources according to the
chosen boot sequence option (see table
S300 boot sequence
configuration [
}
page 16]).
Console mode
The purpose of the console mode is to enable the handling of firmware
programming – such as the download of a firmware to the SQI Flash – via a
USB connection (USB socket
X301 of the board) from a development PC
(Flasher Tool from Hilscher).
For information about how to use the Flasher Tool from Hilscher for
the NXHX 4000-JTAG+, see Getting Started document
NXHX
4000-JTAG+ Development Board , DOC171004GSxxEN.
Note:
Temporarily connecting
RDY
to ground ( S300-E ) while carrying out a
reset cycle forces the device into console mode regardless of the
initial state and boot mode settings.
NXHX 4000-JTAG+ | Device description
DOC170703HW02EN | Revision 2 | English | 2018-10 | Released | Public © Hilscher 2018