Input/Output Address Areas; Overview Of The Internal Module Registers; Battery Status Register (Read-Only); Mram Address Register - Siemens SIMATIC IPC277D Operating Instructions Manual

9.5.4

Input/output address areas

9.5.4.1

Overview of the internal module registers

The following addresses are used for the internal registers:
Register type
Watchdog register

Battery status register (read-only)

(Page 133)
9.5.4.2 Battery status register (read-only)
The status of the CMOS battery is monitored; the status (two-tier) can be read from the
battery status register.
9.5.4.3

MRAM address register

MRAM occupies a 512 KB memory address area that can be read via PCI registers.
Meaning of the bits
MRAM address register
PCI register address:
MRAM base address register
8010 2010h
SIMATIC IPC277D
Operating Instructions, 12/2016, A5E03409486-AE
Addresses
See Intel Atom E6xx data sheet
(http://www.intel.com/content/www/us/en/intelligent-
systems/medical-applications/atom-e6xx-series-datasheet.html)
RTC_low:
GPIO_BAR(D31:F0 offset 44-47h) + offset 08h bit 1
RTC_fail: GPIO_BAR(D31:F0 offset 44-47h) + offset 08h bit 2
PCI register content:
MRAM memory address (default)
9040 0000h
Address is assigned dynamically
(depending on device configura-
tion)
Technical specifications
9.5 Hardware description
Length of the memory area
80000 h
133