NXP Semiconductors
UMxxxxx
Install Guide
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Preliminary 1
— September 6, 2013
© NXP B.V. 2013. All rights reserved.
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8.1
Theory of Operation
The Bridge Board is mostly a mechanical platform for the old style with a 9-pin, in-line, non-polarized
connector of NXP designed I2C demo boards that use a non-polarized nine position connector. Previous NXP
I2C demo boards were released with both vertical and horizontal mounting, and both male pins and female
sockets. The Bridge Board (OM13399) therefore has both styles. There is also a ‘Tester’ connector that allows
direct connection of the third party tools (see section 8 below). The Old style with a 9-pin, in-line, non-
polarized connector nine-circuit connector had only one I2C Bus, with SCL and SDA signals. The Fm+
Development Board Daughter Card ports have two I2C Buses (Bus1 and Bus2) signals. One or other I2C Bus can
be selected by jumpers. The power source may also be selected by jumper.
8.2
Circuit Description
The schematic diagram has a single sheet. For clarification only fragments of the schematic are shown
here. The full schematic should be downloaded if required. The circuit is simple.
8.2.1 Fm+ Development Board (OM13260) Connector (CN3)
Fig 8.3 Fm+ Development Board (OM13260) Connector (CN3)
The connector on the Bridge Board (OM13399) matches the Port connectors on the Fm+ Development Board
(OM13260) See figure 8.3. A Bridge Board (OM13399) can be attached to any Port A – Port D inclusive. It can’t
be connected to Port E due to mechanical arrangement of the Port E connector.
The Fm+ Development Board has two separate I2C Buses (Bus1 and Bus2) and one of these is selected by two
jumpers JP2 for SCL and JP3 for SDA.
Содержание OM13260
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