10.3 Power Sequencing And Reset Distribution - Intel S5500WB12V Specification

Power Subsystem Intel® Server Board S5500WB TPS
The SSI uses the standard 24-pin and 8-pin power headers along with the 5pin Control
connector. The 12-V only uses two 8-pin power headers, a 7-pin control header and a 6 pin
HDD power connector. For maximum rack server efficiency, a DC 12-V only power supply is
recommended. Appendix A shows connector pin outs.
PMbus communications between the power supply and server board must comply with both
SMBus and I2C Bus timing requirements.

10.3 Power Sequencing and Reset Distribution

The IBMC device is integrated into the power control and reset logic of the system. This design
reduces the discrete logic requirements of previous generations and at the same time permits
FW to manage certain features related to the power on/off control and the reset logic.
84 Revision 1.9
Intel order number E53971-008