DESCRIPTION OF PIN FUNCTIONS
PIN
No./
QFP
BUFFER
TYPE
PER
BUFFER
TYPE
NAME
TOTAL
SYMBOL
NOTES
FUNCTION
(NOTE 1)
3
Motor On 0
Write Protected
Track 0
1
1
1
1
1
nMTR0
nWRTPRT
nTRKO
nINDEX
GP40/
O12
IS
IS
IS
(O12/OD12)
IS
IS
IS
(I/O12/OD12)/
(O12/OD12)
15
14
13
1
Index Pulse Input
General Purpose
I/O/Drive Density
Select 0
IO12
DRVDEN0
2
General Purpose
I/O/Drive Density
Select 1
1
GP41/
DRVDEN1
IO12
(I/O12/OD12)/
(O12/OD12)
SERIAL PORT 1 INTERFACE (8)
84
85
87
Receive Serial Data 1
Transmit Serial Data 1
Request to Send 1
1
1
1
RXD1
TXD1
nRTS1/
SYSOP
IS
O12
O8
IS
O12
O8
88
89
86
91
90
Clear to Send 1
1
1
1
1
1
nCTS1
nDTR1
nDSR1
nDCD1
nRI1
I
I
Data Terminal Ready 1
Data Set Ready 1
Data Carrier Detect 1
Ring Indicator 1
O6
O6
I
I
I
I
I
I
SERIAL PORT 2 INTERFACE (8)
95
96
General Purpose I/O
/Receive Serial Data 2
(Infrared Rx)
General Purpose I/O
/Transmit Serial Data 2
(Infrared Tx)
1
GP52/RXD2( IS/O8
IRRX)
(IS/O8/OD8)
/IS
1
GP53/TXD2( IO12
IRTX)
(I/O12/
OD12)/O12
5
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
1
GP55/
nRTS2
IO8
IO8
IO8
IO8
IO8
(I/O8/OD8)/
O8
GP56/
nCTS2
GP57/
nDTR2
GP54/
nDSR2
(I/O8/OD8)/I
100
97
(I/O8/OD8)/
O8
(I/O8/OD8)/I
94
General Purpose
GP51/
(I/O8/OD8)/I
I/O/Data Carrier Detect
2
nDCD2
92
General Purpose
1
GP50/nRI2
IO8
(I/O8/OD8)/I
I/O/Ring Indicator 2
PARALLEL PORT INTERFACE (17)
66
67
68
69
70
71
72
Initiate Output
Printer Select Input
Port Data 0
Port Data 1
Port Data 2
1
1
1
1
1
1
1
nINIT
nSLCTIN
PD0
PD1
PD2
OP14
OP14
IOP14
IOP14
IOP14
IOP14
IOP14
(OD14/OP14)
(OD14/OP14)
IOP14
IOP14
IOP14
Port Data 3
Port Data 4
PD3
PD4
IOP14
IOP14
Page 7
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