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2.3.2.2 Configuration host mode ­ switch (S2)
The host mode is evaluated by the Second Stage Bootloader during boot.
The Second Stage Bootloader uses this setting to initialize the selected
Dual­Port Memory Mode in the host interface.
Note:
The S2 Switch was altered in the hardware revision 4 of the NXHX
board. Please note the different settings relating to hardware
revisions ≤ 3 and 4 shown in the tables below.
Hardware revisions 1 – 3:
S2 1 2 Function
ON ON Serial Dual­Port Memory Mode (SPI Slave
Mode 3)
OFF
OFF ON Parallel Dual­Port Memory Mode
16 bit mode
OFF OFF Parallel Dual­Port Memory Mode
8 bit mode
Table 9: Configuration ­ Switch S2, host mode (valid for hardware revisions 1 – 3)
Since hardware revision 4:
S2 1 2 Function
ON ON Serial Dual­Port Memory Mode (SPI Slave
Mode 3)
OFF
OFF ON Parallel Dual­Port Memory Mode
8 bit mode
OFF OFF Parallel Dual­Port Memory Mode
16 bit mode
Table 10: Configuration ­ Switch S2, host mode (valid since hardware revision 4)
Position (22) in section Printed circuit board [
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page 11].
2.3.2.3 MMIO general input ­ switch (S30)
These four signals can be used by the user software.
S30 SW Signal Connected to Description
1 MMIO36 with 1.5 kΩ to +3.3 V ON = Pull­up connected
OFF = No Pull­up connected
2 MMIO37 with 1.5 kΩ to +3.3 V
3 MMIO38 with 1.5 kΩ to +3.3 V
4 MMIO39 with 1.5 kΩ to +3.3 V
Table 11: DIL­Switch S30
Position (8) in section Printed circuit board [
}
page 11].
NXHX 51­ETM | Development Board
DOC120606HW06EN | Revision 6 | English | 2015­01 | Released | Public © Hilscher 2012 – 2015