3
DESCRIPTION OF PIN FUNCTIONS
BUFFER
TYPE
BUFFER TYPE
PER FUNCTION
(NOTE 1)
QFP
NAME
TOTAL
SYMBOL
NOTES
PIN #
PROCESSOR/HOST LPC INTERFACE (10)
23:20
Multiplexed
Command,
4
LAD[3:0]
PCI_IO
PCI_IO
Address, Data [3:0]
Frame
PCI_I
PCI_O
PCI_I
PCI_I
PCI_ICLK
PCI_IO
24
25
26
27
29
30
1
1
1
1
1
1
LFRAME#
LDRQ#
PCI_RESET# PCI_I
LPCPD#
PCI_CLK
SER_IRQ
CLOCKS (4)
CLOCKI32
PCI_I
PCI_O
Encoded DMA Request
PCI Reset
Power Down
PCI Clock
2
3
PCI_I
PCI_ICLK
PCI_IO
Serial IRQ
IS
6
32.768KHz Trickle Clock
Input
1
IS
19
123
14.318MHz Clock Input
1
1
CLOCKI
ICLK
IS
IS
IS
IS
11, 14
14
24MHz Crystal (terminal 1)
/ 48MHz Clock Input
124
51
52
54
55
24MHz Crystal (terminal 2)
1
1
1
1
1
OCLK
FAN CONTROL (4)
IS
IS
(I/O8/OD8)/I
(I/O8/OD8)/I
General Purpose I/O
/Fan Tachometer 2
General Purpose I/O
/Fan Tachometer 1
General Purpose I/O
/Fan Speed Control 2
General Purpose I/O
/Fan Speed Control 1
GP30/
IO8
FAN_TACH2
GP31/
IO8
FAN_TACH1
(I/O12/OD12)/
(O12/OD12)
(I/O12/OD12)/
(O12/OD12)
4
4
GP32/FAN2
GP33/FAN1
IO12
IO12
INFRARED INTERFACE (2)
IS/(IS/O8/OD8)
61
62
Infrared Rx
1
IRRX2/GP34
IS/O8
/General Purpose I/O
Infrared Tx
O12/(I/O12/OD12)
5, 6
1
IRTX2/GP35
IO12
/General Purpose I/O
POWER PINS (16)
VCC
53,
Power
4
7
65,93,1
25
7, 31,
60,76,
101,
Ground
VSS
102,
128
40
44
18,
113,
122
Analog Ground
Reference Voltage
Trickle Voltage
1
1
3
AVSS
VREF
VTR
7
FDD INTERFACE (14)
IS
16
11
10
Read Disk Data
Write Gate
Write Disk Data
1
1
1
nRDATA
nWGATE
nWDATA
IS
O12
O12
(O12/OD12)
(O12/OD12)
SMSC DS – LPC47M14X
Page 10
Rev. 03/19/2001
SMSC [ SMSC CORPORATION ]
