W83697HFFDC Information Storage Devices, Inc, W83697HFFDC Datasheet - Page 75
W83697HFFDC
Manufacturer Part Number
W83697HFFDC
Description
LPC Interface I/o Plus Game/midi Port, Fan Control, Flash ROM I/f
Manufacturer
Information Storage Devices, Inc
Datasheet
1.W83697HFFDC.pdf
(167 pages)
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6.2.3 Printer Control Latch and Printer Control Swapper
The system microprocessor can read the contents of the printer control latch by reading the printer
control swapper. Bit definitions are as follows:
Bit 7, 6: These two bits are a logic one during a read. They can be written.
Bit 5: Direction control bit
Bit 4: A 1 in this position allows an interrupt to occur when
Bit 3: A 1 in this bit position selects the printer.
Bit 2: A 0 starts the printer (50 microsecond pulse, minimum).
Bit 1: A 1 causes the printer to line-feed after a line is printed.
Bit 0: A 0.5 microsecond minimum high active pulse clocks data into the printer. Valid data must be
6.2.4 EPP Address Port
The address port is available only in EPP mode. Bit definitions are as follows:
When this bit is a logic 1, the parallel port is in input mode (read); when it is a logic 0, the parallel
port is in output mode (write). This bit can be read and written. In SPP mode, this bit is invalid
and fixed at zero.
present for a minimum of 0.5 microseconds before and after the strobe pulse.
1
7
7
6
1
6
5
5
4
3
4
- 66 -
2
3
1
2
0
ACK#
1
STROBE
AUTO FD
INIT
SLCT IN
IRQ ENABLE
DIR
0
changes from low to high.
Publication Release Date: Feb. 2002
PD0
PD1
PD2
PD3
PD4
PD5
PD6
PD7
W83697HF/F
Revision 0.70
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