W83627EHF Datasheet, PDF (19/141 Pages) Winbond – evolving product from Winbonds most popular I/O family

W83627EHF/EF, W83627EHG/EG
5.4 Serial Port & Infrared Port Interface
SYMBOL PIN
CTSA#
49
GP67
CTSB#
78
SYMBOL PIN
GP47***
DSRA#
50
GP66
DSRB#
79
GP46*
RTSA#
HEFRAS
51
I/O
IN_t
I/OD_12t
IN_t
I/O
I/OD_12t
IN_t
I/OD_12t
IN_t
I/OD_12t
OUT₈
IN_t
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.
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(20K±
30%) and is defined as HEFRAS, which provides the power-on
value for CR26 bit 6 (HEFRAS). A 1 kΩ is reserved to pull down
and a 1 kΩ is recommended if intends to pull up. (select 4EH as
configuration I/O port′s address)
GP65
I/O_{8 General purpose I/O port 6 bit 5.}
RTSB#
GP45***
80
OUT₈
UART B Request To Send. An active low signal informs the
modem or data set that the controller is ready to send data.
I/OD_8t General purpose I/O port 4 bit 5.
DTRA#
OUT₈
UART A Data Terminal Ready. An active low signal informs the
modem or data set that the controller is ready to communicate.
52
PENROM
During power-on reset, this pin is pulled down internally(20K ±
30%)and is defined as PENROM disable, which provides the
IN_{t power-on value for CR24 bit 1 (ENROM). A 1 kΩ is reserved to}
pull down and a 1 kΩ resistor is recommended if intends to pull-
up to enable ROM.
GP64
I/O₈ General purpose I/O port 6 bit 4.
Publication Release Date: January 18, 2006
-13-
Revision 1.0