BUFFER
TYPE
BUFFER TYPE
PER FUNCTION
(NOTE 1)
(O12/OD12)
(O12/OD12)
(O12/OD12)
IS
QFP
NAME
Head Select
Step Direction
Step Pulse
Disk Change
Drive Select 0
Motor On 0
Write Protected
Track 0
TOTAL
SYMBOL
nHDSEL
NOTES
PIN #
12
8
9
4
5
1
1
1
1
1
1
1
1
1
1
O12
nDIR
O12
O12
IS
O12
O12
IS
IS
IS
IO12
nSTEP
nDSKCHG
nDS0
nMTR0
nWRTPRT
nTRKO
nINDEX
(O12/OD12)
(O12/OD12)
3
IS
IS
IS
15
14
13
1
Index Pulse Input
(I/O12/OD12)/
General Purpose I/O/Drive
GP40/
(O12/OD12)
Density Select 0
DRVDEN0
(I/O12/OD12)/
(O12/OD12)
2
General Purpose I/O/Drive
Density Select 1
1
GP41/
IO12
DRVDEN1
SERIAL PORT 1 INTERFACE (8)
84
85
87
88
89
86
91
90
Receive Serial Data 1
Transmit Serial Data 1
Request to Send 1
Clear to Send 1
Data Terminal Ready 1
Data Set Ready 1
Data Carrier Detect 1
Ring Indicator 1
1
1
1
1
1
1
1
1
RXD1
TXD1
IS
O12
O8
I
IS
O12
O8
I
nRTS1
nCTS1
nDTR1
nDSR1
nDCD1
nRI1
O6
O6
I
I
I
I
I
I
SERIAL PORT 2 INTERFACE (8)
(IS/O8/OD8)/IS
95
96
General Purpose I/O
1
GP52/RXD2
IS/O8
(IRRX)
/Receive Serial Data
2
/Infrared Rx
General Purpose I/O
(I/O12/OD12)/O12
5
1
GP53/TXD2
(IRTX)
IO12
/Transmit Serial Data 2
/Infrared Tx
(I/O8/OD8)/O8
(I/O8/OD8)/I
(I/O8/OD8)/O8
(I/O8/OD8)/I
98
99
General Purpose I/O
/Request to Send 2
General Purpose I/O
/Clear to Send 2
General Purpose I/O
/Data Terminal Ready
General Purpose I/O
/Data Set Ready 2
1
1
1
1
GP55/nRTS2
GP56/nCTS2
GP57/nDTR2
GP54/nDSR2
IO8
IO8
IO8
IO8
100
97
94
92
General Purpose I/O/Data
1
1
GP51/nDCD2 IO8
GP50/nRI2 IO8
(I/O8/OD8)/I
(I/O8/OD8)/I
Carrier Detect 2
General Purpose I/O/Ring
Indicator 2
PARALLEL PORT INTERFACE (17)
66
67
68
69
70
71
72
73
74
Initiate Output
Printer Select Input
Port Data 0
Port Data 1
Port Data 2
Port Data 3
Port Data 4
Port Data 5
Port Data 6
nINIT
nSLCTIN
PD0
OP14
OP14
IOP14
IOP14
IOP14
IOP14
IOP14
IOP14
IOP14
(OD14/OP14)
(OD14/OP14)
IOP14
IOP14
IOP14
IOP14
IOP14
IOP14
IOP14
1
1
1
1
1
1
1
1
1
PD1
PD2
PD3
PD4
PD5
PD6
SMSC DS – LPC47M14X
Page 11
Rev. 03/19/2001
SMSC [ SMSC CORPORATION ]
