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LPC47M112 Datasheet(PDF) 84 Page - SMSC Corporation

Part # LPC47M112
Description  ENHANCED SUPER I/O CONTROLLER WITH LPC INTERFACE
PDF  208 Pages
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Manufacturer  SMSC [SMSC Corporation]
Direct Link  http://www.smsc.com
Logo SMSC - SMSC Corporation

LPC47M112 Datasheet(HTML) 84 Page - SMSC Corporation

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Enhanced Super I/O Controller with LPC Interface
Datasheet
SMSC DS – LPC47M112
Page 84
Rev. 02/02/2005
18 PARALLEL PORT
The LPC47M112 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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