參數(shù)資料
型號(hào)： W83977CTF-AW
英文描述： PERIPHERAL (MULTIFUNCTION) CONTROLLER
中文描述： 周邊（多功能）控制器
文件頁數(shù)： 19/161頁
文件大?。?/td> 592K
代理商： W83977CTF-AW
W83977EF/ CTF
PRELIMINARY
Publication Release Date: March 1999
-10 -
Revision A1
1.3 Serial Port Interface, continued
SYMBOL
PIN
I/O
FUNCTION
DTRA#
PNPCSV#
44
I/O
8t
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 PNPCSV#, which provides the power-on value for
CR24 bit 0 (PNPCSV#). A 4.7 k
is recommended if intending to
pull up. (clears the default value of FDC, UARTs, and PRT).
DTRB#
51
I/O
8t
UART B Data Terminal Ready. An active low signal informs the
modem or data set that controller is ready to communicate.
SINA
SINB
45, 52
IN
t
Serial Input. Used to receive serial data through the
communication link.
SOUTA
46
I/O
8t
UART A Serial Output. Used to transmit serial data out to the
communication link.
PENKBC
During power-on reset, this pin is pulled down internally and is
defined as PENKBC, which provides the power-on value for
CR24 bit 2 (ENKBC). A 4.7 k
resistor is recommended if
intending to pull up. (enables KBC).
SOUTB
PEN48
53
I/O
8t
UART B Serial Output. During power-on reset, this pin is pulled
down internally and is defined as PEN48, which provides the
power-on value for CR24 bit 6 (EN48). A 4.7 k
resistor is
recommended if intending to pull up.
DCDA#
DCDB#
47
54
IN
t
Data Carrier Detect. An active low signal indicates the modem
or data set has detected a data carrier.
RIA#
RIB#
65
66
IN
t
Ring Indicator. An active low signal indicates that a ring signal is
being received from the modem or data set.
1.4 Infrared Interface
SYMBOL
IRRX
IRTX
PIN
37
38
I/O
IN
cs
OUT
12t
FUNCTION
Infrared Receiver Input.
Infrared Transmitter Output.
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