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FDC37M70X Datasheet(PDF) 81 Page - List of Unclassifed Manufacturers

Part No. FDC37M70X
Description  Enhanced Super I/O Controller with Wake-Up
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Maker  ETC [List of Unclassifed Manufacturers]
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81
PARALLEL PORT
The FDC37M70x 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 FDC37M70x also provides a mode for
support of the floppy disk controller on the
parallel port.
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
AD7
2,3
EPP DATA
PORT 0
PD0
PD1
PD2
PD3
PD4
PD5
PD6
PD7
2,3
EPP DATA
PORT 1
PD0
PD1
PD2
PD3
PD4
PD5
PD6
PD7
2,3
EPP DATA
PORT 2
PD0
PD1
PD2
PD3
PD4
PD5
PD6
PD7
2,3
EPP DATA
PORT 3
PD0
PD1
PD2
PD3
PD4
PD5
PD6
PD7
2,3
Note 1: These registers are available in all modes.
Note 2: These registers are only available in EPP mode.
Note 3: For EPP mode, IOCHRDY must be connected to the ISA bus.




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