Intel OCPRF100 MP - Manual (Page 139)

OCPRF100 MP Server System Technical Product Specification
Revision 1.0
132
cifically, this bus connects the FPC and BMC. Also, there may be an SMM based device on the
bus and a cluster card connector based device.
On the FPC, this bus consists of the I2C_BACKUP_SCL and the I2C_BACKUP_SDA signals.
10.2.12.3 I
2
C Development Support Jumpers
Development support jumpers on the I
2
C buses are provided to isolate I
2
C devices. These jump-
ers must first be enabled by removing Resistor Pack RP3A4 and RP3A5 and adding all J3 jump-
ers. Once enabled, specific I
2
C devices/sections can be isolated by removing the jumpers.
In production, the jumper blocks are not stuffed.
10.2.13 Miscellaneous
10.2.13.1 Signal RESET_OUTPUTS_L
The RESET_OUTPUTS_L signal is used to enable the output latch. Immediately after the micro-
controller comes out of a hard reset, this signal goes to the deasserted (high) state. In this state,
the output latch is output disabled, but retains any states written to it. The microcontroller initial-
izes the latch with proper values before the RESET_OUTPUTS_L signal is asserted (low).