Advanced I/O Controller with Motherboard GLUE Logic
Datasheet
REGISTER
TEST 7
ADDRESS
CHIP (GLOBAL) CONTROL REGISTERS
0x29 R/W Bit[0] LD_NUM
DESCRIPTION
= 0 New LD Numbering (selected when pin 117 is
Default = 0x00
(when pin 117 is
NC)
NC)
= 1 SMSC LD Numbering (selected when pin 117 is
connected to VTR)
0x01 (when pin 117
is connected to
VTR)
Pin 117 is used to select the mode of the logical
device numbering. This pin affects the LD_NUM bit
as follows:
on VCC POR,
VTR POR and
HARD RESET
The pin has an internal pull-down resistor that
selects the non-SMSC mode. To select this
mode, the pin should be left unconnected. This
configuration clears the LD_NUM bit to ‘0’ and
the associated functionality corresponds to the
existing functionality in the part when the
LD_NUM bit=0.
Connecting this pin to VTR will select the
SMSC mode of the logical device numbering.
This configuration sets the LD_NUM bit to ‘1’
and the associated functionality corresponds to
the existing functionality in the part when the
LD_NUM bit=1.
Bits[7:1] Reserved
TEST 6
0x2A R/W Test Modes: Reserved for SMSC. Users should not
write to this register, may produce undesired results.
Default = 0x00, on
VCC POR and
VTR POR
TEST 4
0x2B R/W Test Modes: Reserved for SMSC. Users should not
write to this register, may produce undesired results.
Default = 0x00, on
VCC POR and
VTR POR
TEST 5
0x2C R/W Bit[7] Test Mode: Reserved for SMSC. Users
should not write to this bit, may produce undesired
results.
Default = 0x00, on
VCC POR and
VTR POR
Bit[6] 8042 Reset:
1 = put the 8042 into reset
0 = take the 8042 out of reset
Bits[5:0] Test Mode: Reserved for SMSC. Users
should not write to this bit, may produce undesired
results.
TEST 1
0x2D R/W Test Modes: Reserved for SMSC. Users should not
write to this register, may produce undesired results.
Default = 0x00, on
VCC POR and
VTR POR
TEST 2
0x2E R/W Test Modes: Reserved for SMSC. Users should not
write to this register, may produce undesired results.
Default = 0x00, on
VCC POR and
VTR POR
Revision 1.8 SMSC/Non-SMSC Register Sets (02-24-05)
176
SMSC LPC47M182
DATASHEET
SMSC [ SMSC CORPORATION ]
