Pn-Pll (Incl. 3X Application Timer Blocks); Figure 24: Block Diagram Of Pn-Mux For Pn_Irqx(2:1/15:2) Single Interrupts - Siemens ERTEC 200P-2 Manual

To flexible adaption of external HW events to Interrupt Management, they can be config-
ured separately over the IRQExt_Event register using Ext_IRQx_Level for the active
level. Either level or edge triggering can also be selected with Ext_IRQx_Edge.
PN-MUX
Each PN_IRQx(2:1/15:2) single interrupt is generated as shown here:
IRQControl_MUX
IRQ_SelectMUX
(n = 2...15)
0
1
85
60 63
Virtual
IRQ_Activate
register

Figure 24: Block diagram of PN-MUX for PN_IRQx(2:1/15:2) single interrupts

Event bits 63 - 60 are assigned bits(3:0) from the IRQ_Activate registers to allow a SW
event to be triggered with PN_IRQx(0/1:0) group interrupts and PN_IRQx(2:1/15:2) single
interrupts. Write access to the relevant register bits triggers a SW event as a pulse (8 ns
pulse). Write access in the IRQ_Activate registers is non-retentive. Read access always
returns a value of 0x0000.
For each interrupt output, you can set which PN-IP event or SW event is implemented
externally as a single interrupt over the IRQControl_MUXn register with IRQ_SelectMUX.
PN-IP event are assigned event numbers (IRQ_SelectMUX) in line with the assignment
(bit position) of the PN-IP events in the IRQEvent register.
The interrupt load of the selected single event in the connected CPU subsystems can be
reduced by writing IRQxControl_MUXn.IRQ_WaitTime. No new single event (single inter-
rupt) is entered in the external CPU subsystem while IRQ_WaitTime is running
(IRQ_WaitTime 0x000). During this time, the selected events are buffered in IRQxCon-
trol_MUXn.IRQ_Event and trigger a single interrupt as soon as IRQ_WaitTime
(IRQ_WaitTime = 0x000) is up. At the same time, the value saved in IRQ_Event is
cleared. The single
(IRQx_Control.IRQ_Length) with pulse extension. The current timer value can be read
back with read access. If there is another instance of read access to IRQxCon-
trol_MUXnbefore IRQ_WaitTime is up, the newly written value is used as IRQ_WaitTime.
This allows IRQ_WaitTime to be extended or shortened by writing the SW in time.
As long as IRQ_WaitTime is not written and therefore not used (i.e. IRQ_WaitTime =
0x000, default value), the selected single event (single interrupt) is connected straight to
the relevant CPU subsystems (combinatorial).

2.3.8.1.3 PN-PLL (incl. 3x Application Timer Blocks)

Copyright © Siemens AG 2016. All rights reserved
Technical data subject to change
IRQ_WaitTime
Reset
D
Q
14
Physical
IRQ_Control
registers
event is extended
232
14
Pulse
Extension
IRQ_Length
IRQ_Level
to the configured
1
IRQ(2:1/15:2)
pulse length
ERTEC 200P-2 Manual
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