Phytec phyCORE-LPC2292/94, Hardware Manual

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phyCORE-LPC2292/94
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PHYTEC Meßtechnik GmbH 2006 L-658e_5
16.3.12 Battery Connector BAT1
The mounting space BAT1 ( see PCB stencil ) is provided for
connection of a battery that buffers the RTC on the
phyCORE-LPC2292/94. In the event of a VCC operating voltage
failure the RTC is automatically supplied with power from the
connected battery. There is also the option of buffering the SRAMs
with an external battery. This optional setting is configured with
Jumper J25 (
see section 3.11 ). In most cases an SRAM buffer is not
recommended since the SRAM devices draw their operating current
from VBAT during runtime of the module and therefore cause rapid
battery discharge. It is the user's responsibility to ensure sufficient
SRAM power supply during runtime. The optional battery required for
the RTC buffering (
refer to section 10 ) is available through PHYTEC
(order code BL-011).
16.3.13 DS2401 Silicon Serial Number
Communication to a DS2401 Silicon Serial Number can be imple-
mented in various software applications for the definition of a node
address or as copy protection in networked applications. The DS2401
can be soldered on space U10 or U9 on the Carrier Board, depending
on the type of device packaging being used.
The Silicon Serial Number Chip mounted on the phyCORE Carrier
Board HD200 can be connected to port pin P0.9 of the LPC2292/94
available at GPIO1 (JP19 = closed).
Jumper Setting Description
JP19 closed Port pin P0.9 (GPIO1) of the LPC2292/94
is used to access the Silicon Serial Number
Table 77: JP19 Jumper Configuration for Silicon Serial Number Chip