Advanced I/O Controller with Motherboard GLUE Logic
Datasheet
3.3
Pins That Require External Resistors
The following pins require external resistors:
Table 3.3 – Pins that Require External Resistors
SIGNAL NAME
SER_IRQ
nLDRQ
RESISTOR VALUE
10 kohm
100 kohm
NOTES
Pull-up to VCC
Pull-up to VCC
Pull-up to VCC
LAD[3:0]
100 kohm
MCLK
MDAT
KCLK
2.7 kohm
Pull-up to VREG_PS2. The
VREG_PS2 is the voltage
regulator for the PS/2 ports.
KDAT
GA20M
KBDRST
nIO_PME
nHDSEL
nWGATE
nWDATA
nSTEP
nDIR
nDS0
10 kohm
10 kohm
10 kohm
10 kohm
10 kohm
10 kohm
10 kohm
10 kohm
10 kohm
10 kohm
10 kohm
10 kohm
1 kohm
Pull-up to VCC
Pull-up to VCC
Pull-up to VTR
Pull-up required if used as
Open-Drain Output.
Pull-up to VCC.
nMTR0
DRVDEN1
DRVDEN0
nDSKCHG
nRDATA
Pull-up to VCC
Pull-up to VCC
1 kohm
nWRTPRT
1 kohm
Pull-up to VCC
nTRK0
nINDEX
REF5V
REF5V_STBY
nIDE_RSTDRV
nPS_ON
nBACKFEED_CUT
SCK_BJT_GATE
nCDC_DWN_ENAB
YLW_LED
nHD_LED
DDCSDA_3V
DDCSCL_3V
DDCSDA_5V
DDCSCL_5V
SMB_CLK_M
SMB_CLK_R
1 kohm
10 kohm
1 kohm
1 kohm
1 kohm
1 kohm
1 kohm
1 kohm
10 kohm
220 ohm
330 ohm
4.7 kohm
4.7 kohm
2.2 kohm
2.2 kohm
2.7 kohm
2.7 kohm
Pull-up to VCC
Pull-up to VCC
Pull-up to VCC5V
Pull-up to V_5P0_STBY
Pull-up to VCC5V
Pull-up to V_5P0_STBY
Pull-up to V_5P0_STBY
Pull-up to V_5P0_STBY
Pull-down to VSS
Pull-up to VTR
Pull-up to VCC
Pull-up to VCC
Pull-up to VCC
Pull-up to VCC5V
Pull-up to VCC5V
Pull-up to VCC
Pull-up to VTR
Revision 1.8 SMSC/Non-SMSC Register Sets (02-24-05)
24
SMSC LPC47M182
DATASHEET
SMSC [ SMSC CORPORATION ]
