W83627F Information Storage Devices, Inc, W83627F Datasheet - Page 20

• Manufacturer Part Number: W83627F
• Description: LPC Interface I/o Plus Kbc, Game Port, Midi Port
• Manufacturer: Information Storage Devices, Inc

1.4 Serial Port Interface
CTSA#
CTSB#
DSRA#
DSRB#
RTSA#
HEFRAS
DTRA#
PNPCVS#
RTSB#
DTRB#
SINA
SINB
SOUTA
PENKBC
SOUTB
PEN48
DCDA#
DCDB#
RIA#
RIB#
SYMBOL
49
78
50
79
51
52
80
81
53
82
54
83
56
84
57
85
PIN
IN
IN
O
IN
O
IN
O
O
IN
O
IN
O
IN
IN
IN
8C
8C
8C
8C
8C
8C
t
t
cd
cd
t
cd
cd
t
t
I/O
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, which provides the power-on value for CR26 bit
6 (HEFRAS). A 4.7 k
(select 4EH as configuration I/O port s address)
UART B 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 PNPCVS# , which provides the power-on value for CR24
bit 0, A 4.7k
to clear the default value of FDC, UARTs, and LPT setting)
UART B Request To Send. An active low signal informs the modem
or data set that the controller is ready to send data.
UART B Data Terminal Ready. An active low signal informs the
modem or data set that controller is ready to communicate.
Serial Input. It is used to receive serial data through the
communication link.
UART A Serial Output. It is used to transmit serial data out to the
communication link.
During power-on reset, this pin is pulled down internally and is
defined as PENKBC, which provides the power-on value for CR24 bit
2 (PENKBC). A 4.7 k
up. ( enable KBC)
UART B Serial Output. During power-on reset, this pin is pulled
down internally and is defined as PEN48, which provides the power-
on value for CR24 bit 6 (EN48). A 4.7 k
intends to pull up.
Data Carrier Detect. An active low signal indicates the modem or
data set has detected a data carrier.
Ring Indicator. An active low signal indicates that a ring signal is
being received from the modem or data set.
is recommended if intends to pull up.(This bit is used
- 16 -
resistor is recommended if intends to pull
is recommended if intends to pull up.
FUNCTION
Publication Release Date:November 2002
resistor is recommended if
W83627HF/F
Revision 2.0