LPC47M112_07 SMSC [SMSC Corporation], LPC47M112_07 Datasheet - Page 172

• Manufacturer Part Number: LPC47M112_07
• Description: Enhanced Super I/O Controller with LPC Interface
• Manufacturer: SMSC [SMSC Corporation]

Enhanced Super I/O Controller with LPC Interface
Datasheet
Note 1: The TXD2_MODE bit is a VTR powered bit that is reset on VTR POR only.
SMSC DS – LPC47M112
KRST_GA20
Default = 0x00
on VCC POR,
VTR POR and
HARD RESET
IR Option Register
Default = 0x02
on VCC POR,
VTR POR and
HARD RESET
IR
Timeout
Default = 0x03
on VCC POR,
VTR POR and
HARD RESET
NAME
Half
NAME
Duplex
Table 69 - KYBD, Logical Device 7 [Logical Device Number = 0x07]
REG INDEX
REG INDEX
0xF0
R/W
0xF1 R/W
0xF2
KRESET and GateA20 Select
Bit[7] Polarity Select for P12
Bit[6] M_ISO. Enables/disables isolation of mouse
signals into 8042. Does not affect MDAT signal to mouse
wakeup (PME) logic.
1=block mouse clock and data signals into 8042
0= do not block mouse clock and data signals into 8042
Bit[5] K_ISO.
signals into 8042.
keyboard wakeup (PME) logic.
1=block keyboard clock and data signals into 8042
0= do not block keyboard clock and data signals into
8042
Bit[4] MLATCH
(default)
Bit[3] KLATCH
(default)
Bit[2] Port 92 Select
Bit[1] Reserved
= 0 MINT is the 8042 MINT ANDed with Latched MINT
= 1 MINT is the latched 8042 MINT
= 0 KINT is the 8042 KINT ANDed with Latched KINT
= 1 KINT is the latched 8042 KINT
= 0 P12 active low (default)
= 1 P12 active high
= 0 Port 92 Disabled
= 1 Port 92 Enabled
Bit[0] Receive Polarity
= 0
= 1
Bit[1] Transmit Polarity
= 0
= 1
Bit[2] Duplex Select
= 0
= 1
Bits[5:3] IR Mode
= 000
= 001
= 010
= 011
= 1xx
Bit[6] IR Location Mux
= 0
= 1
Bit[7] Reserved, write 0.
Bits [7:0]
These bits set the half duplex time-out for the IR port.
This value is 0 to 10msec in 100usec increments.
0= blank during transmit/receive
1= blank during transmit/receive + 100usec
. . .
DATASHEET
Active High (Default)
Active Low
Full Duplex (Default)
Standard COM Functionality (Default)
IrDA
ASK-IR
Reserved
Reserved
Use Serial port TXD2 and RXD2 (Default)
Use alternate IRRX2 (pin 61) and IRTX2 (pin
62)
Active High
Active Low (Default)
Half Duplex
Page 172
Enables/disables isolation of keyboard
Does not affect KDAT signal to
DEFINITION
DEFINITION
STATE
STATE
C
Rev. 02-16-07