Technical Product Specification

Intel
®
Server Chassis P4000S Family TPS Chassis Power Sub-system
Revision 1.5 Intel order number G22850-006
69
2.4.4.1 System PWOK requirements
The system will connect the PWOK signal to 3.3V or 5V from 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 92. System PWOK Requirements
Motherboard pull-up voltage
MIN resistance value (ohms)
5V
10K
3.3V
6.8K
2.4.5 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.
2.4.6 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.
2.4.6.1 Addressing
The PDB address the power supply as follows on the PDB.
0 = open, 1 = grounded
Table 93. 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