2.9.2. AHB expansion

This section describes the AHB expansion features of the IoT Subsystem.

AHB initiator ports

Two AHB INITIATOR ports permit external AHB masters to be connected to the IoT Subsystem. These ports are prefixed with INITEXP<0..1>:

  • INITEXP0 port is reserved for the AHB DMA master port of the BlueTooth Radio.

  • INITEXP1 port can be used to connect any additional AHB master to the system.

Note

If one of the initiator ports is not used, then it must be tied off properly at SoC integration level.

AHB target ports

Two AHB TARGET ports permit external AHB masters to be connected to the IoT Subsystem. These ports are prefixed with TARGETEXP<0..1>:

  • TARGETEXP0 port is reserved for the AHB DMA slave port of the BlueTooth Radio.

  • TARGETEXP1 port can be used to connect any additional AHB slave to the system.

Note

If one of the target ports is not used, then the default slave must be connected to the port.

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