hilscher 7763.200, Manual

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Descriptions and drawings 14/72
Host interface mode
The host interface mode is selected by the signals SPI_MOSI (S1.3),
SPI_CLK (S1.4) and SPI_MISO (S1.5). The ROM code reads these signals
and uses them to initialize the host interface during the boot process. This
means that depending on the selected mode, signals are driven actively
from netX or from the host.
To select the right host interface mode consider the following:
1. specify the device that is physically connected to the host interface of
the netX and
2. specify which device netX has to use as source or destination device
during boot.
S1.3 S1.4 S1.5 Description Usable with
boot mode
No. Note
netX boots from the connected memory:
off off off Ignore host interface during boot
Use this setting, if netX should not boot from
the host interface.
1, 2, 4 ­
off off on SDRAM 16 bit data / 4 MByte
Use this setting, when using the module NXHX­
PHYSDR. SDRAM is used as destination
device.
1, 3, 4 Using this mode requires
additionally that the destination
device in the boot block of the
bootable image is set properly.
off on off SRAM 16 bit data / 4 MB
Use this setting, if you have connected parallel
Flash (CS0) at the host interface and netX has
to boot from it. The parallel Flash is used as
source device.
­ or ­
Use this setting, if you have connected static
RAM (CS0, 1, 2 or 3) at the host interface. The
static RAM is used as destination device.
1, 3, 4
on off on SDRAM 32 bit data / 4 MB
Use this setting, when using the module NXHX­
SDR. SDRAM is used as destination device.
1, 3, 4
Host CPU supported: Host CPU boots netX via Dual­Port Memory:
off on on Serial dual­port memory (SPM) mode
Use this setting, if you have connected a serial
dual­port memory at the host interface and netX
has to boot from it. The serial dual­port memory
is used as source device.
3 The dual­port memory is used
for booting netX. The netX waits
for the Host CPU, which has to
transfer the bootable image
(e. g. Second Stage
Bootloader). Therefore the Host
CPU has to use the mailboxes
of netX for transferring the boot
code.
on off off Parallel dual­port memory (DPM) 8 bit data /
2 KB
Use this setting, if you have connected a
parallel dual­port memory at the host interface
and netX has to boot from it. The parallel dual­
port memory is used as source device.
3
on on on Parallel dual­port memory (DPM) 8 bit data /
64 Kbyte
Use this setting, if you have connected a
parallel dual­port memory at the host interface
and netX has to boot from it. The parallel dual­
port memory is used as source device.
3
Reserved:
on on off Do not use this setting! ­ ­
Table 8: Host interface mode at X3 (settings)
NXHX 51­ETM | Development Board
DOC120606HW06EN | Revision 6 | English | 2015­01 | Released | Public © Hilscher 2012 – 2015