User's Manual

GE864- QUAD Har dwar e User Guide
1vv0300872 Rev.1 2010-04-02
- All Rights Reserved. Page 45 of 77
A power sour ce of the internal interface voltage corresponding to the 2.8VCMOS high
level is available at the VAUX pin on the connector,
A maximum of 9 resistors of 47 KΩ pull- up can be connected to the PWRMON pin,
pr ovided no other devices are connected to it and the pul led-up lines are GE864-
QUAD input lines connected to open collector outputs in order to avoid latch-up
pr oblems on the GE864-QUAD.
Care must be taken to avoid latch-up on the GE864-QUAD and the use of this output
line to power electronic devices shall be avoided, especially for devices that generate
spikes and noise such as switching level translators, micro controller s, failure in any
of these condition can severely compr omise the GE864-QUAD functionality.
NOTE:
The input lines wor king at 2.8VCMOS can be pulled- up with 47KΩ resistors that can
be connected dir ectly to the VAUX line provided they are connected as in this
example.
In case of repr ogramming of the module has to be considered the use of the RESET
line to start corr ectly the activity.
The preferable configuration is having an external supply for the buffer.