w83627ef Winbond Electronics Corp America, w83627ef Datasheet - Page 19

• Manufacturer Part Number: w83627ef
• Description: Lpc Super I/o For Desktop & Server
• Manufacturer: Winbond Electronics Corp America

Serial Port & Infrared Port Interface, Continued.
PENROM
SYMBOL
HEFRAS
GP45***
GP43***
DSRB#
RTSA#
RTSB#
DTRA#
DTRB#
GP46*
GP44*
GP65
GP64
GP63
SINA
SINB
IRRX
PIN
79
51
80
52
81
53
82
I/OD
I/OD
I/OD
I/OD
OUT
OUT
OUT
OUT
I/OD
I/O
I/O
I/O
IN
IN
IN
IN
IN
t
t
t
t
t
8
8
12t
12
8t
8t
8
8
8
8
8
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.
General purpose I/O port 4 bit 6.
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(20K±
30%) and is defined as HEFRAS, which provides the power-on
value for CR26 bit 6 (HEFRAS).
and a 1 kΩ is recommended if intends to pull up. (select 4EH as
configuration I/O port′s address)
General purpose I/O port 6 bit 5.
UART B Request To Send. An active low signal informs the
modem or data set that the controller is ready to send data.
General purpose I/O port 4 bit 5.
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(20K ±
30%)and is defined as PENROM disable, which provides the
power-on value for CR24 bit 1 (ENROM).
pull down
up to enable ROM.
General purpose I/O port 6 bit 4.
UART B Data Terminal Ready. An active low signal informs the
modem or data set that controller is ready to communicate.
General purpose I/O port 4 bit 4.
Serial Input. It is used to receive serial data through the
communication link.
General purpose I/O port 6 bit 3.
Serial Input. It is used to receive serial data through the
communication link.
IR Receiver input.
General purpose I/O port 4 bit 3.
W83627EHF/EF, W83627EHG/EG
and a 1 kΩ resistor is recommended if intends to pull-
- 13 -
FUNCTION
A 1 kΩ is reserved to pull down
Publication Release Date: Nov. 2006
A 1 kΩ is reserved to
Revision 1.3