LPC47N237-MD SMSC [SMSC Corporation], LPC47N237-MD Datasheet - Page 15

• Manufacturer Part Number: LPC47N237-MD
• Description: 3.3V I/O CONTROLLER FOR PORT REPLICATORS AND DOCKING STATIONS
• Manufacturer: SMSC [SMSC Corporation]

3.3v I/O Controller for Port Replicators and Docking Stations
SMSC DS – LPC47N237
PIN#
90
91
66
67
68
69
70
71
72
73
74
75
(NOTE 4.1)
nSLCTIN
NAME
nDCD
nINIT
PD0
PD1
PD2
PD3
PD4
PD5
PD6
PD7
nRI
Active low Ring Indicator inputs for the
serial port. Handshake signal which notifies
the UART that the telephone ring signal is
detected by the modem. The CPU can
monitor the status of nRI signal by reading
bit 6 of Modem Status Register (MSR). A
nRI signal state change from low to high
after the last MSR read will set MSR bit 2 to
a 1. If bit 3 of Interrupt Enable Register is
set, the interrupt is generated when nRI
changes state.
Note: Bit 6 of MSR is the complement of
This pin can be used for wakeup.
serial port. Handshake signal which notifies
the UART that carrier signal is detected by
the modem. The CPU can monitor the
status of nDCD signal by reading bit 7 of
Modem Status Register (MSR). A nDCD
signal state change from low to high after
the last MSR read will set MSR bit 3 to a 1.
If bit 3 of Interrupt Enable Register is set,
the interrupt is generated when nDCD
changes state.
Note: Bit 7 of MSR is the complement of
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
Active low Data Carrier Detect inputs for the
nRI.
nDCD.
PARALLEL PORT INTERFACE (17)
DESCRIPTION
DATASHEET
Page 15
(NOTE 4.2)
BUFFER
NAME
IOP14
IOP14
IOP14
IOP14
IOP14
IOP14
IOP14
IOP14
OP14
OP14
I
I
WELL
(NOTE
PWR
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VTR
4.3)
Revision 0.3 (10-26-04)
(Note 4.7)
NOTES