w83627ehf Winbond Electronics Corp America, w83627ehf Datasheet - Page 19

• Manufacturer Part Number: w83627ehf
• Description: W83627ehf/ef W83627ehg/eg Winbond Lpc I/o
• Manufacturer: Winbond Electronics Corp America

5.4
PENROM
SYMBOL
HEFRAS
SYMBOL
GP47***
GP45***
DSRA#
DSRB#
DTRA#
CTSA#
CTSB#
RTSA#
RTSB#
GP46*
GP67
GP66
GP65
GP64
Serial Port & Infrared Port Interface
PIN
PIN
49
78
50
79
51
80
52
I/OD
I/OD
I/OD
I/OD
I/OD
OUT
OUT
OUT
I/O
I/O
I/O
I/O
IN
IN
IN
IN
IN
IN
t
t
t
t
t
t
8
8
12t
12t
12t
12t
8t
8
8
8
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.
General purpose I/O port 6 bit 7.
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.
FUNCTION
General purpose I/O port 4 bit 7.
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 6 bit 6.
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(20ÞD
Æø¼ and is defined as HEFRAS, which provides the power-on
value for CR26 bit 6 (HEFRAS).
and a 1 k: is recommended if intends to pull up. (select 4EH as
configuration I/O portcs 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 D
Æø¼and 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.
W83627EHF/EF, W83627EHG/EG
and a 1 k: resistor is recommended if intends to pull-
-13-
Publication Release Date: January 18, 2006
FUNCTION
A 1 k: is reserved to pull down
A 1 k: is reserved to
Revision 1.0