Artesyn MVME2502 Installation and Use (April 2015) - Manual (Page 102)

Functional Description
MVME2502 Installation and Use (6806800R96E) 102
4.14 Reset/Control CPLD
The CPLD provides the following functions:
 Power control and fault detection
 Reset sequence and reset management
 Status and control registers
 Miscellaneous control logic
 Watchdog timer
 32-bit Tick Timer
 Clock generator
 Switch decoder and LED controller
4.15 Power Management
The MVME2502 backplane is utilized to derive +3.3V, +2.5V, +1.8V, +1.5V, +1.2V, +1.05V
voltage rail. Each voltage rail is controlled by the CPLD through an enable pin of the regulator,
while the output is monitored through power good signal. If a voltage rail fails, the CPLD will
disable all of the regulators. To restart the system, the chassis power switch must be power-
cycled.
4.15.1 On-board Voltage Supply Requirement
The on-board power supply is considered to be out of regulation if the output voltage level is
below the minimum required power or goes beyond the maximum.
Table 4-5 Voltage Supply Requirement
Voltage Rail
Voltage Rail Requirement
Minimum Maximum
+3.3 V 3.15 V 3.45 V
+2.5 V 2.375 V 2.625 V
+1.8 V 1.7 V 1.9 V