PIN
No./QFP
NAME
TOTAL
SYMBOL
nCTS2
BUFFER TYPE
127
128
125
122
120
Clear to Send 2
1
I
Data Terminal Ready
Data Set Ready 2
Data Carrier Detect 2
Ring Indicator 2
1
nDTR2
nDSR2
nDCD2
nRI2
O4
1
I
I
I
1
1
PARALLEL PORT INTERFACE (17)
96-103
95
Parallel Port Data Bus
Printer Select
8
1
1
1
1
1
PD[0:7]
nSLCTIN
nINIT
IOP14
OP14
94
Initiate Output
Auto Line Feed
Strobe Signal
OP14
110
111
107
108
106
105
109
nALF
OP14
nSTROBE
BUSY
OP14
Busy Signal
I
I
I
I
I
Acknowledge Handshake
Paper End
1
1
1
1
nACK
PE
Printer Selected
Error at Printer
SLCT
nERROR
KEYBOARD/MOUSE INTERFACE (6)
70
71
72
73
75
Keyboard Data
Keyboard Clock
Mouse Data
1
1
1
1
1
KDAT
KCLK
MDAT
MCLK
IOD16
IOD16
IOD16
IOD16
O4
Mouse Clock
Keyboard Reset
KBDRST
(Note 2)
76
Gate A20
1
A20M
O4
Note 1 The “n” as the first letter of a signal name indicates an “Active Low” signal.
Note 2 KBDRST is active low.
Note 3 This pin defaults to an output and low.
10
SMSC [ SMSC CORPORATION ]
