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ERTEC 200P-2 Manual
Technical data subject to change
Version 1.0
GDMA) is sent to the IO-RAM as instances of single access; this minimizes the lockout
time for the communicative instance for the IO_RAM.
2.3.8 PROFINET-IP
2.3.8.1 PN-IP Interfaces
2.3.8.1.1 AHB Interface
The PN-IP is connected to the multi-layer AHB over an AHB master and an AHB slave
interface.
Over the AHB master interface, the PN-IP can transfer data over the multi-layer AHB as
the active bus master. At the same time, other AHB masters can access PN-IP resources
over the AHB slave interface.
The AHB interfaces of the PN-IP do not support split or retry functions. All other transfer
types, transfer sizes and burst operations as per the AMBA specifications are supported (
see chapter 7.2.)
2.3.8.1.2 Interrupt Management
All interrupt events generated by mechanisms of the PN-IP can be provided over CPUs
connected with Interrupt Management. Three CPU systems (CPU subsystems) are sup-
ported. These are as follows for the ERTEC 200P:
ARM926 subsystem
Event unit in PER-IF (external host CPU)
PN stack and application SW allocation in the CPU systems is not fixed. Individual inter-
rupt event assignment to interrupt inputs / interrupt controllers of the CPUs is therefore
universally applicable. For the ARM926 and host subsystem, the specific number of all
interrupt events occurring in the PN-IP is provided. This is done as follows:
with a CPU-specific interrupt controller (PN-ICU) that generates two group interrupts
each for all interrupt events for the ARM926 (PN-ICU 2) / external host (PN-ICU 3)
PN_IRQ2/3(
1:0
)
with a CPU-specific multiplexer structure (PN-MUX) that provides 14 selectable PN
interrupt events for the ARM926 (PN-ICU 2) / external host (PN-ICU 3) as single in-
terrupts
PN_IRQ2/3(
15:2
).
Figure 5:
Diagram of Interrupt Management in the PN-IP
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