System Resources; Input/Output Address Areas; Overview Of The Internal Module Registers; Watchdog Control Register - Siemens SIMATIC IPC277G PRO Operating Instructions Manual

8.5.4

System resources

Currently allocated system resources
All system resources (hardware addresses, memory utilization, interrupt assignment, DMA
channels) are assigned dynamically by the Windows operating system, depending on the
hardware equipment, drivers and connected external devices. You can view the current
allocation of system resources or possible conflicts in the Control Panel.
Procedure
To view the system resources, proceed as follows:
1. Right-click the Windows Start menu and select "Device Manager".
2. Click on the View menu and turn on " Resources by type" or "Resources by connection".
All the interrupts show under the Interrupt request (IRQ) catalog.
8.5.5

Input/output address areas

8.5.5.1

Overview of the internal module registers

The following addresses are used for the internal registers:
Addresses
SIO logic device 8 CR F0h
SIO logic device 8 CR F1h
SIO logic device 8 CR F2h
SIO logic device 7 CR FDh
For more information and reference code for accessing to Super IO, contact Siemens
Technical support.
8.5.5.2

Watchdog control register

Bit
0
1
2
SIMATIC IPC277G PRO
Operating Instructions, 02/2022, A5E51373692-AA
Input/output unit
Watchdog control register (Page 109)
Watchdog counter register (Page 110)
Watchdog state register (Page 110)
Battery status register (Page 110)
Read/Write Meaning of the bits
state
Read/Write Watchdog Timer I Pulse or Level mode select:
• 0: Pulse mode
• 1: Level mode
Read/Write Not used for watchdog
Read/Write Not used for watchdog
Technical specifications
8.5 Hardware descriptions
109