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參數(shù)資料
| 型號(hào)： | W83977TF |
| 廠商： | WINBOND ELECTRONICS CORP |
| 英文描述： | Multi-Function I/O Port Controller(用于個(gè)人計(jì)算機(jī)的多功能輸入/輸出口控制器) |
| 中文描述： | 多功能I / O端口控制器（用于個(gè)人計(jì)算機(jī)的多功能輸入/輸出口控制器） |
| 文件頁(yè)數(shù)： | 16/160頁(yè) |
| 文件大小： | 1012K |
| 代理商： | W83977TF |
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W83977TF
PRELIMINARY
Publication Release Date: April 1998
-8-
Revision 0.62
1.3 Serial Port Interface
SYMBOL
PIN
41
48
I/O
IN
t
FUNCTION
CTSA
CTSB
Clear To Send is the modem control input.
The function of these pins can be tested by reading Bit 4 of the
handshake status register.
DSRA
DSRB
42
49
IN
t
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.
RTSA
43
I/O
8t
UART A Request To Send. An active low signal informs the
modem or data set that the controller is ready to send data.
HEFRAS
During power-on reset, this pin is pulled down internally and is
defined as HEFRAS, which provides the power-on value for CR26
bit 6 (HEFRAS). A 4.7 k
is recommended if intends to pull up.
(select 370H as configuration I/O port
′
s address)
RTSB
50
I/O
8t
UART B Request To Send. An active low signal informs the
modem or data set that the controller is ready to send data.
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 intends to pull up.
(clear 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 intends to pull
up. (enable 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 intends 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.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| W83977TF(EOL) | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:W83877TF plus KBC. CIR. RTC |
| W83977TF_98 | 制造商:WINBOND 制造商全稱:Winbond 功能描述:WINBOND I/O |
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| W83977TF-AW | 制造商:WINBOND 制造商全稱:Winbond 功能描述:WINBOND I/O |
| W83977TF-P | 制造商:WINBOND 制造商全稱:Winbond 功能描述:I/O chip disk drive adapter |
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