TQFP
PIN #
72
BUFFER
TYPE
NAME
nInitiate
Output/
FDC
SYMBOL
DESCRIPTION
nINIT
(OD14/OP1 This output is bit 2 of the printer control register. This
4)/OD12
is used to initiate the printer when low.
Refer to Parallel Port description for use of this pin in
ECP and EPP mode.
nDirection
Control
(Note3)
nAutofeed
Output/
FDC
nDIR
See FDC Pin definition.
74
75
59
nAUTOFD (OD14/OP1 This output goes low to cause the printer to
4)/OD12
automatically feed one line after each line is printed.
The nAUTOFD output is the complement of bit 1 of
the Printer Control Register.
nDensity
Select
Refer to Parallel Port description for use of this pin in
ECP and EPP mode.
(Note3)
nDENSEL
See FDC Pin definition.
nStrobe
Output/
nSTROBE (OD14/OP1 An active low pulse on this output is used to strobe
4)/OD12
the printer data into the printer. The nSTROBE
output is the complement of bit 0 of the Printer Control
Register.
FDC nDrive
Select 0
(Note3)
Refer to Parallel Port description for use of this pin in
ECP and EPP mode.
nDS0
BUSY
See FDC Pin definition.
Busy/
FDC
I/OD12
This is a status output from the printer, a high
indicating that the printer is not ready to receive new
data. Bit 7 of the Printer Status Register is the
complement of the BUSY input. Refer to Parallel Port
description for use of this pin in ECP and EPP mode.
See FDC Pin definition.
nMotor On
1
nMTR1
nACK
60
58
57
73
nAcknowl-
edge/FDC
nDrive
I/OD12
I/OD12
I/OD12
I/OD12
A low active output from the printer indicating that it
has received the data and is ready to accept new
data. Bit 6 of the Printer Status Register reads the
nACK input. Refer to Parallel Port description for use
of this pin in ECP and EPP mode.
Select 1
nDS1
See FDC Pin definition.
Paper End/ PE
FDC nWrite
Data
Another status output from the printer, a high
indicating that the printer is out of paper. Bit 5 of the
Printer Status Register reads the PE input. Refer to
Parallel Port description for use of this pin in ECP and
EPP mode.
nWRDATA
SLCT
See FDC Pin definition.
Printer
This high active output from the printer indicates that
it has power on. Bit 4 of the Printer Status Register
Selected
Status/
reads the SLCT input.
Refer to Parallel Port
FDC nWrite
Gate
description for use of this pin in ECP and EPP mode.
See FDC Pin definition.
nWGATE
nError/FDC nERROR
A low on this input from the printer indicates that there
is a error condition at the printer. Bit 3 of the Printer
Status register reads the nERR input. Refer to
Parallel Port description for use of this pin in ECP and
EPP mode.
nHead
Select
nHDSEL
PD0
See FDC Pin definition.
69
68
67
Port Data
0/FDC
IOP14/IS Port Data 0
nIndex
nINDEX
PD1
See FDC Pin definition.
IOP14/IS Port Data 1
Port Data
1/FDC
nTrack 0
Port Data
2/FDC
nTRK0
PD2
See FDC Pin definition.
IOP14/IS Port Data 2
nWrite
nWRTPRT
See FDC Pin definition.
Protected
SMSC DS – FDC37N769
Page 11 of 137
Rev. 12/21/2000
SMSC [ SMSC CORPORATION ]
