w83l517g Winbond Electronics Corp America, w83l517g Datasheet - Page 17

• Manufacturer Part Number: w83l517g
• Description: Winbond Lpc I/o For Notebook W83l517d/ W83l517d-f
• Manufacturer: Winbond Electronics Corp America

Multi-Mode Parallel Port, continued
4.4
(DRVDEN0)
(HEFRAS)
SYMBOL
SYMBOL
DSRA#
CTSA#
RTSA#
Serial Port Interface and Infrared Port
AFD#
STB#
PIN
39
41
42
PIN
37
38
I/O
I/O
In
In
t
t
8t
OD
OD
OD
OD
I/O
-
-
12
12
12
12
Clear To Send. It is the modem control input.
The function of these pins can be tested by reading bit 4 of
the handshake status register.
Data Set Ready. An active low signal indicates the modem
or data set is ready to establish a communication link and
transfer data to the UART.
UART A Request To Send. An active low signal informs the
modem or data set that the controller is ready to send data.
During power-on reset, this pin is pulled down internally and
is defined as HEFRAS and configuration port’s address is
slected to 2Eh, which provides the power-on value for CRXX
bit X (HEFRAS). A 4.7 kΩ resistor is recommended if intends
to pull up and
address)
PRINTER MODE: AFD#
An active low output from this pin causes the printer to
auto feed a line after a line is printed. This pin is pulled
high internally. Refer to the description of the parallel
port for the definition of this pin in ECP and EPP mode.
EXTENSION FDD MODE: DRVDEN0
This pin is for Extension FDD B; its function is the
same as the DRVDEN0 pin of FDC.
EXTENSION 2FDD MODE: DRVDEN0
This pin is for Extension FDD A and B; its function is
the same as the DRVDEN0 pin of FDC.
PRINTER MODE: STB#
An active low output is used to latch the parallel data
into the printer. This pin is pulled high internally. Refer
to the description of the parallel port for the definition of
this pin in ECP and EPP mode.
EXTENSION FDD MODE: This pin is a tri-state output.
EXTENSION 2FDD MODE: This pin is a tri-state
output.
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W83L517D/W83L517D-F
selects 4EH as configuration I/O port′s
FUNCTION
Publication Release Date: May 23, 2005
FUNCTION
Revision 1.0