SMSC DS – LPC47M192
Page 16
Rev. 03/30/05
DATASHEET
QFP PIN#
NAME
DESCRIPTION
BUFFER
NAME
IO8
PWR
WELL
VCC
NOTES
97
GP54/
nDSR2
General Purpose I/O. GPIO can be
configured as an Open-Drain Output.
Data Set Ready 2 Input. See nDSR1 pin
description above.
General Purpose I/O. GPIO can be
configured as an Open-Drain Output.
Data Carrier Detect 2 Input. See nDCD1 pin
description above.
General Purpose I/O. GPIO can be
configured as an Open-Drain Output.
Ring Indicator 2 Input. See nRI1 pin
description above.
PARALLEL PORT INTERFACE (17)
This output is bit 2 of the printer control
register. This is used to initiate the printer
when low. Refer to Parallel Port description
for use of this pin in ECP and EPP mode.
Can be configured as an Open-Drain Output.
This active low output selects the printer.
This is the complement of bit 3 of the Printer
Control Register. Refer to Parallel Port
description for use of this pin in ECP and
EPP mode.
Can be Configured as an Open-Drain
Output.
Port Data 0 I/O
Port Data 1 I/O
Port Data 2 I/O
Port Data 3 I/O
Port Data 4 I/O
Port Data 5 I/O
Port Data 6 I/O
Port Data 7 I/O
This high active input from the printer
indicates that it has power on. Bit 4 of the
Printer Status Register reads the SLCT
input. Refer to Parallel Port description for
use of this pin in ECP and EPP mode.
Another status input 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.
This is a status input 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.
A low active input 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.
5
94
GP51/
nDCD2
IO8
VCC
5
92
GP50/
nRI2
IO8
VCC
5
66
nINIT
OP14
VCC
67
nSLCTIN
OP14
VCC
68
69
70
71
72
73
74
75
77
PD0
PD1
PD2
PD3
PD4
PD5
PD6
PD7
SLCT
IOP14
IOP14
IOP14
IOP14
IOP14
IOP14
IOP14
IOP14
I
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
78
PE
I
VCC
79
BUSY
I
VCC
80
nACK
I
VCC