Electrical aspects common for both solutions
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4.5.3
System LED (SYS LED)
In order to indicate status information, the netX 90 supports a system LED
(SysLED). This is done by the signals RUN# (pin 39) and RDY# (pin 38).
Both are low-active and should be connected to a Duo-LED (colors yellow
and green) as shown in the figure below.
The meanings are as follows:
Signal
Color of
SysLED
Description
RDY#
Yellow
ROM code is active
RUN#
Green
Communication firmware is running
Table 11: RDY/RUN LED colors
Designers may use LEDs with other colors, but we strongly recommend
using this definition. Especially when interpreting blink codes for
troubleshooting, it is helpful, if customer and product support see the same
colors.
These signals are also used for activation of the alternative boot mode and
the console mode, see respective sections of this manual.
Figure 12: Console mode
netRAPID 90 | Design guide
DOC190601DG01EN | Revision 1 (Draft 10) | English | 2019-09 | Preliminary | Public
© Hilscher 2019