W83L517D Datasheet, PDF (18/138 Pages) Winbond – LPC SUPER I/O

W83L517D
1.3 Multi-Mode Parallel Port (Conts’)
Version 0.6
SYMBOL
PIN
AFD#
37
(DRVDEN0)
I/O
OD₁₂
OD₁₂
OD₁₂
FUNCTION
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.
STB#
38
OD₁₂ 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.
1.4 Serial Port Interface and Infrared Port
SYMBOL PIN
CTSA#
39
DSRA#
41
RTSA#
42
I/O
In_t
In_t
I/O_8t
FUNCTION
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.
(HEFRAS)
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 selects 4EH as configuration I/O port′s address)
11
Publication Release Date: Apr. 2000
Revision 0.60