W83627EHF_0611 Datasheet, PDF (19/144 Pages) Winbond – WINBOND LPC I/O

W83627EHF/EF, W83627EHG/EG
Serial Port & Infrared Port Interface, Continued.
SYMBOL
PIN
I/O
FUNCTION
Data Set Ready. An active low signal indicates the modem or
DSRB#
79
IN_{t data set is ready to establish a communication link and transfer}
data to the UART.
GP46*
RTSA#
I/OD_12t
OUT₈
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.
HEFRAS
51
During power-on reset, this pin is pulled down internally(20K±
30%) and is defined as HEFRAS, which provides the power-on
IN_{t 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.
DTRB#
GP44*
81
OUT₈
UART B Data Terminal Ready. An active low signal informs the
modem or data set that controller is ready to communicate.
I/OD_8t General purpose I/O port 4 bit 4.
SINA
GP63
53
IN_t
Serial Input. It is used to receive serial data through the
communication link.
I/OD₈ General purpose I/O port 6 bit 3.
SINB
IRRX
Serial Input. It is used to receive serial data through the
IN_t
communication link.
82
IR Receiver input.
GP43***
I/OD₁₂ General purpose I/O port 4 bit 3.
- 13 -
Publication Release Date: Nov. 2006
Revision 1.3