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A.5
System resources
A.5.1
Currently allocated system resources
All system resources (hardware addresses, memory configuration, allocation of interrupts,
DMA channels) are assigned dynamically by the Windows® operating system, depending on
the hardware configuration, drivers and connected external devices. You can view the
current configuration of system resources or possible conflicts with Windows® as follows:
1. Press the "Windows key" and "R" simultaneously.
The "Run" dialog box opens.
2. Enter "msinfo32" in the "Open" field.
3. Confirm your entry with "OK".
A.5.2
I/O address allocation
A.5.2.1
Overview of the internal module registers
The following addresses are used for the internal registers:
I/O address (hex)
280 h
Base address + offset 0
Base address + offset 2
Base address + offset 5
Base address + offset 6
Base address + offset 7
The following tables describe the system resources for the factory state of the device.
A.5.2.2
Output register user LED L1/L2/L3 (read/write)
The "PC ON/WD" LED indicates the progress of the device startup by pulsing yellow/green.
Once the boot process is completed, the "PC ON/WD" LED lights up continuously green. The
"PC ON/WD" LED cannot be influenced.
The status of the user LEDs L1/L2/L3 can be read and written as follows.
Note: Always use read-modify-write operations so that reserved bits are not overwritten. This
can lead to impairment of the functionality of the device.
SIMATIC IPC BX-32A
Operating Instructions, 09/2023, A5E52798407-AB
Input/output unit
Basic address
GPIO port select register
GPIO data register
WDT control register
WDT counter register
WDT status register
Hardware description
A.5 System resources
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