LPC47M14R-NC View Datasheet(PDF) - SMSC -> Microchip
Part Name
Description
MFG CO.
LPC47M14R-NC
SMSC -> Microchip
'LPC47M14R-NC' PDF : 205 Pages View PDF
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
STATUS PORT
CONTROL PORT
EPP ADDR PORT
BASE ADDRESS + 00H
BASE ADDRESS + 01H
BASE ADDRESS + 02H
BASE ADDRESS + 03H
EPP DATA PORT 0
EPP DATA PORT 1
EPP DATA PORT 2
EPP DATA PORT 3
BASE ADDRESS + 04H
BASE ADDRESS + 05H
BASE ADDRESS + 06H
BASE ADDRESS + 07H
The bit map of these registers is:
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
D0
D1
PD0
PD1
TMOUT
0
STROBE AUTOFD
PD0
PD1
PD0
PD1
PD0
PD1
PD0
PD1
PD0
PD1
D2
PD2
0
nINIT
PD2
PD2
PD2
PD2
PD2
D3
PD3
nERR
SLC
PD3
PD3
PD3
PD3
PD3
D4
PD4
SLCT
IRQE
PD4
PD4
PD4
PD4
PD4
D5
PD5
PE
PCD
PD5
PD5
PD5
PD5
PD5
D6
PD6
nACK
D7 NOTE
PD7
1
nBUSY 1
0
0
1
PD6 PD7
2
PD6 PD7
2
PD6 PD7
2
PD6 PD7
2
PD6 PD7
2
Note 1: These registers are available in all modes.
Note 2: These registers are only available in EPP mode.
SMSC DS – LPC47M14X
Page 78
Rev. 03/19/2001
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