Enhanced Super I/O Controller with Fast IR
Datasheet
PIN NO.
BUFFER
TYPE
NAME
TOTAL
SYMBOL
QFP/TQFP
12 /10
8 / 6
9 / 7
17 / 15
5 / 3
4 / 2
Head Select
Step Direction
Step Pulse
Disk Change
Drive Select 0
Drive Select 1
Motor On 0
Motor On 1
Write Protected
Track 0
Index Pulse Input
Drive Density Select 0
1
1
1
1
1
1
1
1
1
1
1
1
1
nHDSEL
nDIR
nSTEP
nDSKCHG
nDS0
O24/OD24
O24/OD24
O24/OD24
IS
O24/OD24
O24/OD24
O24/OD24
O24/OD24
IS
nDS1
3 / 1
6 / 4
nMTR0
nMTR1
nWRTPRT
nTRKO
nINDEX
DRVDEN0
15 / 13
14 / 12
13 / 11
1 / 99
2 / 100
IS
IS
O24/OD24
Drive Density Select 1/IR Mode Select/IRRX3
DRVDEN1/
O24/OD24/O
IRMODE/
24/I
IRRX3
SERIAL PORT 1 INTERFACE (8)
84 / 82
85 / 83
87 / 85
88 / 86
89 / 87
86 / 84
91 / 89
90 / 88
Receive Serial Data 1
Transmit Serial Data 1
Request to Send 1
Clear to Send 1
Data Terminal Ready 1
Data Set Ready 1
1
1
1
1
1
1
1
1
RXD1
TXD1
nRTS1/ SYSOP
I
O4
O4/I
I
nCTS1
nDTR1
nDSR1
nDCD1
O4
I
I
I
Data Carrier Detect 1
Ring Indicator 1
nRI1
SERIAL PORT 2 INTERFACE (8)
95 / 93
96 / 94
98 / 96
Receive Serial Data 2/Infrared Rx
1
1
1
RXD2/IRRX
TXD2/IRTX
I
Transmit Serial Data 2/Infrared Tx
O24
Request to Send 2/Sys Addr 12/ Parallel IRQ_5
nRTS2/SA12/IR
O4/I/O24/
Q5
OD24
(Note 3.1)
99 / 97
Clear to Send 2/Sys Addr 13/ Parallel IRQ_6
1
1
nCTS2/SA13/IR I/I/O24/ OD24
Q6
(Note 3.1)
100 / 98
Data Terminal Ready/Sys Addr 14/ Parallel IRQ_7
nDTR2/SA14/I
RQ7
O4/I/O24/
OD24
(Note 3.1)
97 / 95
94 / 92
92 / 90
Data Set Ready 2/Sys Addr 15/ Parallel
IRQ_10/nSMI
1
1
1
nDSR2/SA15/I
RQ10/
I/I/O24/OD 24
(Note 3.1)
nSMI
Data Carrier Detect 2/8042 P12/ Parallel IRQ_11
Ring Indicator 2/8042 P16/Parallel IRQ_12
nDCD2/P12/
I/IO24/O24/O
D24
(Note 3.1)
IRQ11
nRI2/P16/
IRQ12
I/IO24/O24/O
D24
(Note 3.1)
PARALLEL PORT INTERFACE (17)
68:75 /
66:73
Parallel Port Data Bus
8
PD[0:7]
IO24
SMSC FDC37C672
Page 13
Rev. 10-29-03
PRELIMINARY DATASHEET
SMSC [ SMSC CORPORATION ]
