AMBA Design Kit Technical Reference Manual - ARM Information ...

APB Components4.3 Peripheral to bridge multiplexorThe peripheral to bridge multiplexor, MuxP2B, connects the read data outputs of eachAPB slave to the APB bridge module, using the PSELx signals to select the requireddata source. The default configuration is sixteen slots. The read data is switched for theduration of an APB transfer, when the PSELx signal is valid. A default value of zero isused when no slaves are selected. Figure 4-5 shows the peripheral to bridge multiplexorblock diagram.Peripheral to bridgemultiplexor moduleRead datamultiplexorsFigure 4-5 Peripheral to bridge multiplexor module componentsNoteThe MuxP2B is used with the Ahb2Apb which is AMBA 2.0 version compatible. A newerversion, the MuxPToB is available to support APB 3.0. It is used with the AhbToApb, whichis AMBA version 3.0 compatible.4.3.1 Signal descriptionsThe peripheral to bridge multiplexor uses only AMBA signals. For a description of theAMBA signals, see AMBA signals on page 1-3.4-12 Copyright © 2003, 2007 ARM Limited. All rights reserved. ARM DDI 0243C