LPC47B272-MS SMSC, LPC47B272-MS Datasheet - Page 107
![IC CTRLR SUPER I/O LPC 100-QFP](/photos/6/82/68212/qfp100-g1_pkg_sml.jpg)
LPC47B272-MS
Manufacturer Part Number
LPC47B272-MS
Description
IC CTRLR SUPER I/O LPC 100-QFP
Manufacturer
SMSC
Datasheet
1.LPC47B272-MS.pdf
(195 pages)
Specifications of LPC47B272-MS
Controller Type
I/O Controller
Interface
LPC
Voltage - Supply
3.3V
Current - Supply
15mA
Operating Temperature
0°C ~ 70°C
Mounting Type
Surface Mount
Package / Case
100-QFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
638-1019
Available stocks
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KDAT and MDAT signals cannot be isolated internal to the part. This causes an IO_PME# to be
generated if the keyboard and/or mouse PME events are enabled. Note that the keyboard and mouse
isolation bits only prevent the internal 8042 in the part from setting these status bits.
Case 1: Keyboard and/or Mouse Powered by VTR
The KBD and/or MOUSE status bits will be set upon a VTR POR if the keyboard and/or mouse are
powered by VTR. In this case, an IO_PME# will not be generated, since the keyboard and mouse PME
enable bits are reset to zero on a VTR POR. The BIOS software needs to clear these PME status bits
after power-up.
Case 2: Keyboard and/or Mouse Powered by VCC
The KBD and/or MOUSE status bits will be set upon a VCC POR if the keyboard and/or mouse are
powered by VCC. In this case, an IO_PME# will be generated if the enable bits were set for wakeup,
since the keyboard and mouse PME enable bits are VTR powered. Therefore, if the keyboard and
mouse are powered by VCC, the enable bits for keyboard and mouse events should be cleared prior to
entering a sleep state where VCC is removed (i.e., S3) to prevent a false PME from being generated. In
this case, the keyboard and mouse should only be used as PME and/or wake events from the S0 and/or
S1 states. The BIOS software needs to clear these PME status bits after power-up.
SMSC LPC47B27x
- 107 -
Rev. 04-17-07
DATASHEET
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