W83627UHG Nuvoton Technology Corporation of America, W83627UHG Datasheet - Page 131

• Manufacturer Part Number: W83627UHG
• Description: IC I/O CONTROLLER 128-QFP
• Manufacturer: Nuvoton Technology Corporation of America

Specifications of W83627UHG

• Applications: PC's, PDA's
• Interface: LPC
• Voltage - Supply: 3.3V, 5V
• Package / Case: 128-XFQFN
• Mounting Type: Surface Mount
• Pin Count: 128
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

The CPU reads the contents of the printer control latch by reading the printer control swapper. The bit
definitions are as follows:
The address port is available only in EPP mode. Bit definitions are as follows:
The contents of DB0-DB7 are buffered (non-inverting) and output to ports PD0-PD7 during a write
operation. The leading edge of IOW# causes an EPP address write cycle to be performed, and the
trailing edge of IOW# latches the data for the duration of the EPP write cycle.
DEFAULT
NAME
BIT
BIT
7-6
NAME
11.2.3
11.2.4
5
4
3
2
1
0
5
4
3
2
1
0
BIT
BIT
PE. A logical 1 means the printer has detected the end of paper.
SLCT. A logical 1 means the printer is selected.
ERROR#. A logical 0 means the printer has encountered an error condition.
1
1
TMOUT. This bit is only valid in EPP mode. A logical 1 indicates that a 10- μ s time-out has
occurred on the EPP bus; a logical 0 means hat no time-out error has occurred. Writing a
logical 1 to this bit clears the time-out status bit; writing a logical 0 has no effect.
These two bits are always read as logical 1 and can be written.
DIR (Direction Control Bit). When this bit is logical 1, the parallel port is in the input mode
(read). When it is logical 0, the parallel port is in the output mode (write). This bit can be
read and written. In SPP mode, this bit is invalid and fixed at zero.
IRQ ENABLE. A logical 1 allows an interrupt to occur when ACK# changes from low to
high.
SLCT IN. a logical 1 selects the printer.
INIT#. A logical 0 starts the printer (50 microsecond pulse, minimum).
AUTO FD. A logical 1 causes the printer to line-feed after a line is printed.
STROBE. A logical 1 generates an active-high pulse for a minimum of 0.5 μ s to clock
data into the printer. Valid data must be presented for a minimum of 0.5 μ s before and
after the strobe pulse.
Printer Control Latch and Printer Control Swapper
EPP Address Port
7
1
PD7
7
6
1
PD6
6
DIR
NA
5
PD5
5
IRQ ENABLE
DESCRIPTION
DESCRIPTION
-116-
4
0
PD4
4
SLCT IN
NA
PD3
3
3
Publication Release Date: March 24, 2008
INIT#
NA
PD2
2
2
W83627UHG
AUTO FD
NA
PD1
1
1
Revision 1.44
STROBE
PD0
NA
0
0