Table 72 - KYBD, Logical Device 7 [Logical Device Number = 0x07]
NAME
KRST_GA20
REG INDEX
DEFINITION
KRESET and GateA20 Select
STATE
0xF0
R/W
Bit[7] Polarity Select for P12
Default = 0x00
on VCC POR,
VTR POR and
HARD RESET
= 0 P12 active low (default)
= 1 P12 active high
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. Enables/disables isolation of keyboard
signals into 8042. Does not affect KDAT signal to
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
= 0 MINT is the 8042 MINT ANDed with Latched MINT
(default)
= 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’
Table 73 - PME, Logical Device A
DEFINITION
Bit[0] (CLK32_PRSN)
NAME
CLOCKI32
REG INDEX
0xF0
STATE
C
0=32kHz clock is connected to the CLKI32
pin (default)
1=32kHz clock is not connected to the CLKI32
(R/W)
Default = 0x00
on VTR POR
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
Table 74 – MPU-401 [Logical Device Number = 0x0B]
NAME
MPU-401 Primary
Base I/O Address
High Byte
REG INDEX
0x60 R/W Bit[0] A8
Bit[1] A9
DEFINITION
STATE
C
Bit[2] A10
Bit[3] A11
Default = 0x03
Bit[4] “0”
on HARD RESET,
SOFT RESET, VCC
POR and VTR POR
MPU-401 Primary
Bit[5] “0”
Bit[6] “0”
Bit[7] “0”
0x61 R/W Bit[0] “0”
C
Page 158
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