LPC47N237-MD SMSC [SMSC Corporation], LPC47N237-MD Datasheet - Page 44

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

Chapter 9
Note 9.1
Note 9.2
Revision 0.3 (10-26-04)
DATA PORT
STATUS
PORT
CONTROL
PORT
EPP ADDR
PORT
EPP DATA
PORT 0
EPP DATA
PORT 1
EPP DATA
PORT 2
EPP DATA
PORT 3
The LPC47N237 incorporates an IBM XT/AT compatible parallel port. This supports the optional PS/2
type bi-directional parallel port (SPP), the Enhanced Parallel Port (EPP) and the Extended Capabilities
Port (ECP) parallel port modes. Refer to the Configuration Registers for information on disabling, power
down, changing the base address of the parallel port, and selecting the mode of operation.
The parallel port also incorporates SMSC's ChiProtect circuitry, which prevents possible damage to the
parallel port due to printer power-up.
The functionality of the Parallel Port is achieved through the use of eight addressable ports, with their
associated registers and control gating. The control and data port are read/write by the CPU, the status
port is read/write in the EPP mode. The address map of the Parallel Port is shown below.
The bit map of these registers is:
These registers are available in all modes.
These registers are only available in EPP mode.
STROBE AUTOFD
TMOUT
PD0
PD0
PD0
PD0
PD0
PD0
D0
Parallel Port
DATA PORT
STATUS PORT
CONTROL PORT
EPP ADDR PORT
EPP DATA PORT 0
EPP DATA PORT 1
EPP DATA PORT 2
EPP DATA PORT 3
PD1
PD1
PD1
PD1
PD1
PD1
D1
0
DATASHEET
nINIT
PD2
PD2
PD2
PD2
PD2
PD2
D2
0
BASE ADDRESS + 00H
BASE ADDRESS + 01H
BASE ADDRESS + 02H
BASE ADDRESS + 03H
BASE ADDRESS + 04H
BASE ADDRESS + 05H
BASE ADDRESS + 06H
BASE ADDRESS + 07H
nERR
Page 44
PD3
SLC
PD3
PD3
PD3
PD3
PD3
D3
SLCT
IRQE
PD4
PD4
PD4
PD4
PD4
PD4
D4
3.3v I/O Controller for Port Replicators and Docking Stations
PCD
PD5
PD5
PD5
PD5
PD5
PD5
PE
D5
nACK
PD6
PD6
PD6
PD6
PD6
PD6
D6
0
nBUSY
PD7
PD7
PD7
PD7
PD7
PD7
D7
0
SMSC DS – LPC47N237
NOTE
(Note
(Note
(Note
(Note
(Note
(Note
(Note
(Note
9.1)
9.1)
9.1)
9.2)
9.2)
9.2)
9.2)
9.2)