Technical Product Specification for Canoe Pass - Preminary - Intel

Intel ® Server Board S2600CP and Server System P4000CP TPS Intel ® Server System P4000CP Power System Options
13.5.4 PWOK (Power OK) Signal
The PDB connects the PWOK signals from the power supply modules and the DC/DC
converters to a common PWOK signal. This common PWOK signal connects to the PWOK pin
on P1. The DC/DC convert PWOK signals have open collector outputs.
13.5.4.1 System PWOK requirements
The system will connect the PWOK signal to 3.3V or 5V via a pull-up resistor. The maximum
sink current of the power supplies are 0.5mA. The minimum resistance of the pull-up resistor is
stated below depending upon the motherboard’s pull-up voltage. Refer to the CRPS power
supply specification for signal details.
13.5.5 PSON Signal
Table 148. System PWOK Requirements
Motherboard pull-up voltage MIN resistance value (ohms)
5V 10K
3.3V 6.8K
The PDB connects the power supplies PSON signals together and connect them to the PSON
signal on P1.
Refer to the CRPS power supply specification for signal details.
13.5.6 PMBus
The PDB has no components on it to support PMBus. It only needs to connect the power supply
PMBus signals (clock, data, SMBAlert#) and pass them to the 1x5 signal connector.
13.5.6.1 Addressing
The PDB address the power supply as follows on the PDB.
0 = open, 1 = grounded
Table 149. PDB addressing
Power Supply Position 1 Power Supply Position 2
PDB addressing Address0/Address1 0/0 0/1
Power supply PMBus device address B0h B2h
Revision 0.8 Intel Confidential
Intel order number G26942-003
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