Intel S2600CP Technical Product Specification - Page 181

Intel® Server Board S2600CP and Server System P4000CP TPS Intel® Server System P4000CP Power System Options 13.4.4 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. 13.4.4.1 System PWOK requirements The system will connect the PWOK signal to 3.3V or 5V by 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. Table 136. System PWOK Requirements Motherboard pull-up voltage 5V 3.3V MIN resistance value (ohms) 10K 6.8K 13.4.5 PSON Signal 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. 13.4.6 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. 13.4.6.1 Addressing The PDB address the power supply as follows on the PDB. 0 = open, 1 = grounded Table 137. PDB addressing PDB addressing Address0/Address1 Power supply PMBus* device address Power Supply Position 1 0/0 B0h Power Supply Position 2 0/1 B2h Revision 1.2 165 Intel order number G26942-003