Table 32: Supply Voltage Range; Table 33: Gpio In Signal Levels; Table 34: Gpio Out Signal Levels - GE VR11 Reference Manual

GE Intelligent Platforms – VR11, VP11 Hardware Reference Manual, Second Edition
b
. TPS2034D (Texas Instruments)
Supply voltage range
The following ranges are defined by the VME64 specification ANSI/VITA 1-
1994 for VME64 and ANSI/VITA 1.1-1997 for VME64 Extensions. The
voltages have to be measured at the backplane.

Table 32: Supply voltage range

Supply Voltage and tolerance
+5 V 5.0 V +0.250 V / -0.125 V
+5 V STDBY 5.0 V +0.250 V / -0.125 V
+3.3 V 3.3 V +0.150 V / -0.050 V
+12 V 12.0 V +0.60 V / -0.36 V
GPIO 0...7
This general purpose I/O pins can be used as inputs, with following signal
levels:

Table 33: GPIO IN signal levels

level voltage
low -0.5 V ... +0.8 V
high +2.0 V ... +3.45 V
When used as outputs, the following signal levels are supplied:

Table 34: GPIO OUT signal levels

level voltage
low -0.4 V at 6 mA sinking
high +2.4 V at 3 mA sourcing
Isolation
The Isolation of the Ethernet outputs whether front or rear is limited to 500 V
peak against GND and any other supply voltage.
By itself the onboard digital ground GND and the front panel/chassis frame
ground FGND are isolated on the VR11 with a layout distance of more than 0.3
mm in all PCB layers. However, most standard devices (keyboard, mouse, and
monitor) except Ethernet will connect FGND and GND directly in the device.
Also standard racks (our starter cage too) connect both grounds at the power
supply for safety reasons.
KB/MS, CRT-DCD
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