SCH3112I-NE SMSC [SMSC Corporation], SCH3112I-NE Datasheet - Page 105

• Manufacturer Part Number: SCH3112I-NE
• Description: LPC IO with 8042 KBC, Reset Generation, HWM and Multiple Serial Ports
• Manufacturer: SMSC [SMSC Corporation]

LPC IO with 8042 KBC, Reset Generation, HWM and Multiple Serial Ports
Datasheet
SMSC SCH311X
Note 8.3
Serial ports 1 and 2 may be placed in the powerdown mode by clearing the
associated activate bit located at CR30 or by clearing the associated power bit
located in the Power Control register at CR22. Serial ports 3,4,5,6 (if available)
may be placed in the powerdown mode by clearing the associated activate bit
located at CR30. When in the powerdown mode, the serial port outputs are
tristated. In cases where the serial port is multiplexed as an alternate function,
the corresponding output will only be tristated if the serial port is the selected
alternate function.
DATASHEET
89
Rev 0.2 (09-28-04)