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The PM uses the following outputs to control the CP6924:
•
Power and Reset control of the payload
•
IMPB A and IMPB B support
•
LED HEALTHY (not on CP6924-RC)
•
Unit Computer reset
The Peripheral Manager provides additional feature and is equipped with following peripherals:
•
The FRU Data Flash device contains the CP6924 FRU information
•
Internal watchdog monitoring PM operation
•
The external watchdog is implemented in glue logic. The PM will be reset if its alive signal fails. The watchdog is dis-
abled in case of a local update.
•
CompactPCI IPMB-O interface
3.3.1
Voltage Sensors
The Peripheral Manager has 6 AD converters. Two analog multiplexer are used to measure all voltages on the CP6924. The
following table shows the settings of the multiplexer control signals.
Table 3-2:
Peripheral Manager AD Input and Voltage Assignment
Signal
MUX_V_0V9_VTT
0
MUX_V_1V0
0
MUX_V_1V2
0
MUX_V_1V25
0
MUX_V_1V8
1
MUX_V_2V5
1
MUX_V_3V3
1
MUX_V_3V3_SUS
0
MUX_V_3V3_CPLD
0
MUX_V_3V3_CPCI
0
MUX_V_5V_CPCI
0
MUX_V_5V_IPMB_PWR
1
3.3.2
Current sensors
The current of the backplane voltages can be measured by the Peripheral Manager internal A/D converters AD0_4 and
AD0_5. The current is measured indirectly by the voltage drop of the sense resistor. The voltage drop is amplified
with a fixed gain of 50.
I=UADC/(R*50)
V_5V_CPCI_CURRENT is connected to AD0_4
V_3V3_CPCI_CURRENT is connected to AD0_5
28
PM_AD1_
PM_AD2_
Nominal
SEL
SEL
Voltage
0
0.9V
1
1.0V
0
1.2V
1
1.25V
X
1.8V
X
2.5V
X
3.3V
1
3.3V
0
3.3V
0
3.3V
0
5V
X
5V
Voltage
PM AD PIN
divider Factor
AD0_0
2.6
AD0_0
2.6
AD0_1
2.353
AD0_1
2.353
AD0_0
1
AD0_1
1.231
AD0_2
1.634
AD0_2
1.634
AD0_2
1.634
AD0_3
1.634
AD0_3
2.434
AD0_3
2.434
CP6924-1 User Guide
Amplifier Gain
6.11
6.11
4.32
4.32
1(no amp)
1(no amp)
1(no amp)
1(no amp)
1(no amp)
1(no amp)
1(no amp)
1(no amp)
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