PIN
No./QFP
124
NAME
Transmit Serial Data 2/Infrared Tx (Note 3)
Request to Send 2
Clear to Send 2
Data Terminal Ready
Data Set Ready 2
TOTAL
SYMBOL
TXD2/IRTX
nRTS2
nCTS2
nDTR2
nDSR2
nDCD2
nRI2
BUFFER TYPE
1
1
1
1
1
1
1
O24
O4
I
126
127
128
125
122
120
O4
I
I
I
Data Carrier Detect 2
Ring Indicator 2
PARALLEL PORT INTERFACE (17)
96-103
95
94
110
111
107
108
106
105
109
Parallel Port Data Bus
Printer Select
Initiate Output
Auto Line Feed
Strobe Signal
Busy Signal
Acknowledge Handshake
Paper End
8
1
1
1
1
1
1
1
1
1
PD[0:7]
nSLCTIN
nINIT
nALF
nSTROBE
BUSY
nACK
PE
SLCT
nERROR
IOP14
OP14
OP14
OP14
OP14
I
I
I
I
I
Printer Selected
Error at Printer
KEYBOARD/MOUSE INTERFACE (6)
70
71
72
73
75
Keyboard Data
Keyboard Clock
Mouse Data
Mouse Clock
Keyboard Reset
1
1
1
1
1
KDAT
KCLK
IOD16
IOD16
IOD16
IOD16
O4
MDAT
MCLK
KBDRST
(Note 2)
A20M
76
Gate A20
1
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. When configured as IRTX (or IRTX2), this pin is low when
the IR block is not transmitting.
Note 4: EETI is the Either Edge Triggered Interrupt Input function.
9
SMSC [ SMSC CORPORATION ]
