LPC47M172 SMSC Corporation, LPC47M172 Datasheet - Page 182

• Manufacturer Part Number: LPC47M172
• Description: ADVANCED I/O CONTROLLER WITH MOTHERBOARD GLUE LOGIC
• Manufacturer: SMSC Corporation

Advanced I/O Controller with Motherboard GLUE Logic
Datasheet
SMSC/Non-SMSC Register Sets (Rev. 02-27-04)
TEST 7
Default = 0x00
(when pin 117 is
NC)
0x01(when pin 117
is connected to
VTR)
on VCC POR,
VTR POR and
HARD RESET
TEST 6
Default = 0x00, on
VCC POR and
VTR POR
TEST 4
Default = 0x00, on
VCC POR and
VTR POR
TEST 5
Default = 0x00, on
VCC POR and
VTR POR
TEST 1
Default = 0x00, on
VCC POR and
VTR POR
TEST 2
Default = 0x00, on
VCC POR and
VTR POR
REGISTER
ADDRESS
CHIP (GLOBAL) CONTROL REGISTERS
0x2C R/W
0x2D R/W
0x2A R/W
0x2B R/W
0x2E R/W
0x29 R/W
DATASHEET
Bits[7:1] Reserved
Bit[0] LD_NUM
= 0 New LD Numbering (selected when pin 117 is
NC)
= 1 SMSC LD Numbering (selected 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:
Test Modes: Reserved for SMSC. Users should not
write to this register, may produce undesired results.
Test Modes: Reserved for SMSC. Users should not
write to this register, may produce undesired results.
Bit[7] Test Mode: Reserved for SMSC. Users
should not write to this bit, may produce undesired
results.
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 Modes: Reserved for SMSC. Users should not
write to this register, may produce undesired results.
Test Modes: Reserved for SMSC. Users should not
write to this register, may produce undesired results.
Page 182
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.
DESCRIPTION
SMSC LPC47M172