
SMSC LPC47B27x
- 166 -
Rev. 08-10-04
DATASHEET
Table 72 - KYBD, Logical Device 7 [Logical Device Number = 0x07]
REG INDEX
= 1 MINT is the latched 8042 MINT
Bit[3] KLATCH
= 0 KINT is the 8042 KINT ANDed with Latched KINT
(default)
= 1 KINT is the latched 8042 KINT
Bit[2] Port 92 Select
= 0 Port 92 Disabled
= 1 Port 92 Enabled
Bit[1] Reserved
Bit[0] Reserved
0xF1 - 0xFF
Reserved - read as ‘0’
NAME
DEFINITION
STATE
Table 73 - PME, Logical Device A
NAME
REG INDEX
0xF0
(R/W)
DEFINITION
STATE
C
CLOCKI32
Default = 0x00
on VTR POR
Bit[0] (CLK32_PRSN)
0=32kHz clock is connected to the CLKI32
pin (default)
1=32kHz clock is not connected to the CLKI32
pin (pin is grounded)
Bit[1] SPEKEY_EN. This bit is used to turn the logic
for the “wake on specific key” feature on and off. It will
disable the 32kHz clock input to the logic when turned
off. The logic will draw no power when disabled.
0= “Wake on specific key” logic is
on (default)
1= “Wake on specific key” logic is off
Bits[7:2] are reserved
Bit[1:0]
00 = Bits in PP mode Register control the FDC on the
parallel port, the FDC_PP pin function is not used.
01 = The FDC_PP pin controls the FDC on the PP as
follows: (non-inverted polarity) when the pin is low, the
parallel port pins are used for a floppy disk controller:
drive 0 is on FDC pins, drive 1 is on parallel port pins
10 = The FDC_PP pin controls the FDC on the PP as
follows: (non-inverted polarity) when the pin is low, the
parallel port pins are used for a floppy disk controller:
drive 0 is on parallel port pins and drive 1 is on parallel
port pins
11 = Reserved
Bits[7:2] Reserved
FDC_PP
Default = 0x00
on VTR POR
0xF1
(R/W)
C
Table 74 – MPU-401 [Logical Device Number = 0x0B]
REG INDEX
0x60 R/W
Bit[1] A9
Bit[2] A10
Bit[3] A11
Bit[4] “0”
Bit[5] “0”
Bit[6] “0”
Bit[7] “0”
0x61 R/W
Bit[1] A1
Bit[2] A2
Bit[3] A3
Bit[4] A4
Bit[5] A5
NAME
DEFINITION
STATE
C
MPU-401 Primary
Base I/O Address
High Byte
Default = 0x03
on HARD RESET,
SOFT RESET, VCC
POR and VTR POR
MPU-401 Primary
Base I/O Address
Low Byte
Default = 0x30
on HARD RESET,
Bit[0] A8
Bit[0] “0”
C