DESCRIPTION OF PIN FUNCTIONS
PIN
No./QFP
16
11
10
12
8
9
17
5
3
15
14
13
1
2
84
85
87
88
89
86
91
90
95
96
98
99
100
NAME
TOTAL
FDD INTERFACE (14)
Read Disk Data
1
Write Gate
1
Write Disk Data
1
Head Select
1
Step Direction
1
Step Pulse
1
Disk Change
1
Drive Select 0
1
Motor On 0
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 (Note 4,
1
Note 7)
Request to Send 2/Sys Addr 12 (Note 6)
1
Clear to Send 2/Sys Addr 13
1
Data Terminal Ready/Sys Addr 14 (Note 6)
1
nRDATA
nWGATE
nWDATA
nHDSEL
nDIR
nSTEP
nDSKCHG
nDS0
nMTR0
nWRTPRT
nTRKO
nINDEX
DRVDEN0
DRVDEN1
RXD1
TXD1
nRTS1/
SYSOP
nCTS1
nDTR1
nDSR1
nDCD1
nRI1
RXD2/IRRX
TXD2/IRTX
nRTS2/SA12
nCTS2/SA13
nDTR2/
SA14
IS
O24/OD24
O24/OD24
O24/OD24
O24/OD24
O24/OD24
IS
O24/OD24
O24/OD24
IS
IS
IS
O24/OD24
O24/OD24
I
O4
O4/I
I
O4
I
I
I
I
O24PD
O4/I
I/I
O4/I
SYMBOL
BUFFER
TYPE
7
SMSC [ SMSC CORPORATION ]
