FDC37N769_07 SMSC [SMSC Corporation], FDC37N769_07 Datasheet - Page 74

• Manufacturer Part Number: FDC37N769_07
• Description: 3.3V Super I/O Controller with Infrared Support for Portable Applications
• Manufacturer: SMSC [SMSC Corporation]

PARALLEL PORT
The FDC37N769 incorporates an IBM XT/AT compatible parallel port. The FDC37N769 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 FDC37N769 Configuration Registers and the following hardware configuration
description for information on disabling, powering down, changing the base address, and selecting the mode of
operation of the parallel port.
The FDC37N769 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 and bit encoding of the Parallel Port registers is shown in
Table
Note
Note
Note
SMSC DS – FDC37N769
1
2
3
62
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
2,3
2,3
2,3
2,3
; the Parallel Port Connector is shown in Table 63.
These registers are available in all modes.
These registers are only available in EPP mode.
For EPP mode, IOCHRDY must be connected to the ISA bus.
2,3
1
1
1
ADDRESS
OFFSET
BASE
00H
01H
02H
03H
04H
05H
06H
07H
STROBE
Table 62 - Parallel Port Registers
TMOUT
DATASHEET
PD0
PD0
PD0
PD0
PD0
PD0
D0
AUTOFD
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PD1
PD1
PD1
PD1
PD1
PD1
D1
0
nINIT
PD2
PD2
PD2
PD2
PD2
PD2
D2
0
nERR
PD3
SLC
PD3
PD3
PD3
PD3
PD3
D3
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
D6
0
nBUSY
PD7
AD7
PD7
PD7
PD7
PD7
D7
Rev. 02-16-07
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