w83627thg Winbond Electronics Corp America, w83627thg Datasheet - Page 20

• Manufacturer Part Number: w83627thg
• Description: Winbond Lpc I/o
• Manufacturer: Winbond Electronics Corp America

3.4
PNPCSV#
SYMBOL
HEFRAS
PENKBC
SOUTA
DSRA#
DSRB#
DTRA#
DTRB#
CTSA#
CTSB#
RTSA#
RTSB#
SINA
SINB
Serial Port Interface
PIN
49
78
50
79
51
80
52
81
53
82
54
I/O
I/O8t
I/O
I/O
I/O
I/O
IN
I/O
IN
IN
IN
IN
IN
12t
tt
t
t
t
t
8t
8t
8t
8t
t
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.
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.
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 kΩ is recommended if intends to pull up.
(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.
UART A Data Terminal Ready. An active low signal informs the
modem or data set that the controller is ready to communicate.
During power-on reset, this pin is pulled down internally and is
defined as PNPCSV# , which provides the power-on value for
CR24 bit 0 ( PNPCSV# ). A 4.7 kΩ is recommended if intends to
pull up. (clear the default value of FDC, UARTs, PRT, Game port
and MIDI port)
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.
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 (ENKBC). A 4.7 kΩ resistor is recommended if intends to pull
up. (enable KBC)
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W83627THF/W83627THG
Publication Release Date: September 26, 2006
FUNCTION
Revision 1.2