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The CPU board, B-CPU6 is made with PC-technology components. Radisys chipset and PLD
handle all timings and signaling for ISA type CPU bus.
The B-CPU6 contains an onboard flash memory where software can be downloaded from a
service pc via Software Download Tool.
2.1.1 Powerfail or standby
When the monitor is turned to standby or the mains voltage fails, NMI-interrupt is generated by
the power control logic. The interrupt signal in the CPU means that all supply voltages except
+5V for the CPU board will be switched off shortly. NMI interrupt service program then saves all
necessary parameters in the static RAM before supply voltages fail.
When hardware detects HALT command generated from power down; all the outputs to the
CPU motherboard are left floating in high impedance state. Only SDRAM refreshing cycle
continues to occur. The halt state will continue until a RESET pulse from the power control logic
circuit is received.
2.1.2 Watchdog functions
There are certain watchdog functions to ensure the monitor's performance. The UPI4NET
board and the optional display controller board interrupt the CPU board continuously in order
to state that they function properly. The CPU board refreshes the watchdog timer in the power
supply unit in order to prevent reset pulse. If the display controller or the CPU stops the
refreshing, the monitor will be reset in order to prevent false information to be displayed on the
screen. If the UPI4NET board stops the refreshment, the board will be reset internally.
2.1.3 SRAM M48T37V
The SRAM with a real-time clock is backed up by a lithium battery.
CAUTION
The IC contains a lithium battery. Discard the battery according to local
regulations.
2.1.4 Integrated Ethernet Controller
The Integrated Ethernet is illustrated in a block diagram shown in
Ethernet controller communicates with the CPU through the PCI bus interface. During the
startup sequence, the controller loads its address and some initialization from the memory.
Ethernet controller transmits data packets to the Datex-Ohmeda Network and receives data
packets from the network through the 10BASE-T transformer. The transformer filters and
transforms the data and also provides the isolation.
The Ethernet status LEDs indicate the status of the network communication. The status LEDs
are controlled by the network controller. The LEDs are not visible when the board is installed
into the monitor.
2.1.5 Integrated Display Controller
B-CPU6 board contains an integrated display controller, which is illustrated in a block diagram
shown in
through its DVI-I connector. The integrated display controller on B-CPU6 acts always as
primary display controller and uses resolution setting through software setting. B-CPU6 board
does not contain jumpers for address and resolution setting as B-DISPX board.
Figure
2. The display controller sends video signals in both analog and digital form
CPU Board and Software Licenses
Figure
2.
Document no. M1125637-04
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