DESCRIPTION OF PIN FUNCTIONS
PIN
No./QFP
12
8
9
17
5
4
3
6
15
14
13
1
2
84
85
87
88
89
86
91
90
95
96
98
99
100
97
94
92
TOTAL
Head Select
1
Step Direction
1
Step Pulse
1
Disk Change
1
Drive Select 0
1
Drive Select 1
1
Motor On 0
1
Motor On 1
1
Write Protected
1
Track 0
1
Index Pulse Input
1
Drive Density Select 0
1
Drive Density Select 1
1
SERIAL PORT 1 INTERFACE (8)
Receive Serial Data 1
1
Transmit Serial Data 1
1
Request to Send 1
1
Clear to Send 1
1
Data Terminal Ready 1
1
Data Set Ready 1
1
Data Carrier Detect 1
1
Ring Indicator 1
1
SERIAL PORT 2 INTERFACE (8)
Receive Serial Data 2/Infrared Rx
1
Transmit Serial Data 2/Infrared Tx
1
Request to Send 2/Sys Addr 12
1
Clear to Send 2/Sys Addr 13
1
Data Terminal Ready/Sys Addr 14
1
Data Set Ready 2/Sys Addr 15
Data Carrier Detect 2/8042 P12
Ring Indicator 2/8042 P16
1
1
1
NAME
SYMBOL
nHDSEL
nDIR
nSTEP
nDSKCHG
nDS0
nDS1
nMTR0
nMTR1
nWRTPRT
nTRKO
nINDEX
DRVDEN0
DRVDEN1
RXD1
TXD1
nRTS1/
SYSOP
nCTS1
nDTR1
nDSR1
nDCD1
nRI1
RXD2/IRRX
TXD2/IRTX
nRTS2/SA12
nCTS2/SA13
nDTR2/
SA14
nDSR2/
SA15
nDCD2/P12
nRI2/P16
BUFFER
TYPE
O24/OD24
O24/OD24
O24/OD24
IS
O24/OD24
O24/OD24
O24/OD24
O24/OD24
IS
IS
IS
O24/OD24
O24/OD24
I
O4
O4/I
I
O4
I
I
I
I
O24
O4/I
I/I
O4/I
I/I
I/IO24
I/IO24
7
SMSC [ SMSC CORPORATION ]
