W83627DHG Datasheet, PDF (24/268 Pages) Winbond – WINBOND LPC I/O

W83627DHG
5.4 Serial Port & Infrared Port Interface
SYMBOL
RIA#
GP60
DCDA#
GP61
SOUTA
PENKBC
GP62
SINA
GP63
DTRA#
PENROM
GP64
RTSA#
HEFRAS
GP65
DSRA#
GP66
PIN
I/O
DESCRIPTION
57
IN_t
Ring Indicator. An active-low signal indicates that a ring signal is
being received from the modem or the data set.
I/OD_12t General-purpose I/O port 6 bit 0.
56
INt
Data Carrier Detection. An active-low signal indicates the modem
or data set has detected a data carrier.
I/OD_12t
O₈
General-purpose I/O port 6 bit 1.
UART A Serial Output. This pin 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, and the power-on values are shown at
54
IN_t
CR24 bit 2. The PCB layout should reserve space for a 1-kΩ
resistor to pull down this pin to ensure the disabling of KBC, and a
1-kΩ resistor is recommended to pull the pin up If wish to enable
KBC.
I/O₈ General-purpose I/O port 6 bit 2.
53
IN_t
Serial Input. This pin is used to receive serial data through the
communication link.
I/OD_12t
O₈
General-purpose I/O port 6 bit 3.
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 PENROM disabled, and the power-on values are
52
IN_t
shown at CR24 bit 1 (ENROM). The PCB layout should reserve
space for a 1-kΩ resistor to pull down this pin to ensure the
disabling of SPI interface, and a 1-kΩ resistor is recommended to
pull the pin up if wish to enable ROM.
I/O₈ General-purpose I/O port 6 bit 4.
O₈
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
51
bit 6 (HEFRAS). The PCB layout should reserve space for a 1-kΩ
IN_t resistor to pull down this pin so as to ensure the selection of I/O
port’s configuration address to 2EH, and a 1-kΩ resistor is
recommended to pull it up if 4EH is selected as I/O port′s
configuration address.
I/O₈
General-purpose I/O port 6 bit 5.
Data Set Ready. An active-low signal indicates the modem or
50
IN_t data set is ready to establish a communication link and transfer
data to the UART.
I/OD_12t General-purpose I/O port 6 bit 6.
Publication Release Date: Aug, 22, 2007
-12-
Version 1.4