FDC37B77X SMSC Corporation, FDC37B77X Datasheet - Page 81

• Manufacturer Part Number: FDC37B77X
• Description: ENHANCED SUPER I/O CONTROLLER WITH WAKE UP FEATURES
• Manufacturer: SMSC Corporation

The FDC37B77x incorporates an IBM XT/AT
compatible parallel port.
optional PS/2 type bi-directional parallel port
(SPP), the Enhanced Parallel Port (EPP) and
the Extended Capabilities Port (ECP) parallel
port modes.
Registers for information on disabling, power
down, changing the base address of the parallel
port, and selecting the mode of operation.
The FDC37B77x also provides a mode for
support of the floppy disk controller on the
parallel port.
DATA PORT
STATUS PORT
CONTROL PORT
EPP ADDR PORT
The bit map of these registers is:
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.
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
STROBE
TMOUT
Refer to the Configuration
PD0
PD0
PD0
PD0
PD0
PD0
D0
BASE ADDRESS + 00H
BASE ADDRESS + 01H
BASE ADDRESS + 02H
BASE ADDRESS + 03H
AUTOFD
PD1
PD1
PD1
PD1
PD1
PD1
This supports the
D1
0
nINIT
PD2
PD2
PD2
PD2
PD2
PD2
D2
0
PARALLEL PORT
nERR
PD3
SLC
PD3
PD3
PD3
PD3
PD3
D3
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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:
EPP DATA PORT 0
EPP DATA PORT 1
EPP DATA PORT 2
EPP DATA PORT 3
SLCT
IRQE
PD4
PD4
PD4
PD4
PD4
PD4
D4
PCD
PD5
PD5
PD5
PD5
PD5
PD5
D5
PE
nACK
PD6
PD6
PD6
PD6
PD6
PD6
BASE ADDRESS + 04H
BASE ADDRESS + 05H
BASE ADDRESS + 06H
BASE ADDRESS + 07H
D6
0
nBUSY
PD7
AD7
PD7
PD7
PD7
PD7
D7
0
Note
2,3
2,3
2,3
2,3
2,3
1
1
1