NXP Semiconductors
UMxxxxx
Install Guide
All information provided in this document is subject to legal disclaimers.
Preliminary 1
— September 6, 2013
© NXP B.V. 2013. All rights reserved.
37 of 70
5.5
Daughter Card Ports
Accessory circuit cards called Daughter Cards may be attached to any ports (Port A – Port D),
connectors CN1 – CN4 respectively, see figure 5.24. Each port carries the same signals, regardless of
physical location. Daughter Cards have jumpers to select whether connection to Bus1 or Bus2 is
required. Port A is shown in figure 5.23; Port B – Port D are identical, and effectively in parallel.
Fig 5.23 Port A
Fig 5.24 Daughter Card Connectors
(Port A and Port B shown)
5.6
Port E
The two independent I2C Buses (Bus1 and Bus2) can be joined electrically to create a single I2C Bus.
The link may be made by wire jumper or by an add-on board with an I2C Bus Buffer device installed.
The PCA9617A Bus Buffer Demo Board (OM13398) (Supplied in the kit) is an example. The Fm+
Development Board (OM13260) may also be operated with nothing connected to Port E (CN12).
The Port E signal pins are arranged to be symmetrical, permitting the card to be rotated 180degress,
effectively changing the direction of the signals through the card. See figure 5.25 and 5.26. Note: When
Summary of Contents for OM13260
Page 71: ......