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LPC47M14X Datasheet(PDF) 78 Page - SMSC Corporation

No. de pieza LPC47M14X
Descripción Electrónicos  128 PIN ENGANCED SUPER I/O CONTROLLER WITH AN LPC INTERFACE AND USB HUB
PDF  205 Pages
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Fabricante Electrónico  SMSC [SMSC Corporation]
Página de inicio  http://www.smsc.com
Logo SMSC - SMSC Corporation

LPC47M14X Datasheet(HTML) 78 Page - SMSC Corporation

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SMSC DS – LPC47M14X
Page 78
Rev. 03/19/2001
6.9
PARALLEL PORT
The LPC47M14x 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:
DATA PORT
BASE ADDRESS + 00H
STATUS PORT
BASE ADDRESS + 01H
CONTROL PORT
BASE ADDRESS + 02H
EPP ADDR PORT
BASE ADDRESS + 03H
EPP DATA PORT 0
BASE ADDRESS + 04H
EPP DATA PORT 1
BASE ADDRESS + 05H
EPP DATA PORT 2
BASE ADDRESS + 06H
EPP DATA PORT 3
BASE ADDRESS + 07H
The bit map of these registers is:
D0
D1
D2
D3
D4
D5
D6
D7
NOTE
DATA PORT
PD0
PD1
PD2
PD3
PD4
PD5
PD6
PD7
1
STATUS
PORT
TMOUT
0
0
nERR
SLCT
PE
nACK
nBUSY
1
CONTROL
PORT
STROBE AUTOFD
nINIT
SLC
IRQE
PCD
0
0
1
EPP ADDR
PORT
PD0
PD1
PD2
PD3
PD4
PD5
PD6
PD7
2
EPP DATA
PORT 0
PD0
PD1
PD2
PD3
PD4
PD5
PD6
PD7
2
EPP DATA
PORT 1
PD0
PD1
PD2
PD3
PD4
PD5
PD6
PD7
2
EPP DATA
PORT 2
PD0
PD1
PD2
PD3
PD4
PD5
PD6
PD7
2
EPP DATA
PORT 3
PD0
PD1
PD2
PD3
PD4
PD5
PD6
PD7
2
Note 1: These registers are available in all modes.
Note 2: These registers are only available in EPP mode.



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