參數(shù)資料
型號(hào)： SC16C752
廠商： NXP Semiconductors N.V.
英文描述： Dual UART with 64-byte FIFO
中文描述： 雙UART具有64字節(jié)FIFO
文件頁(yè)數(shù)： 9/47頁(yè)
文件大?。?/td> 604K
代理商： SC16C752
Philips Semiconductors
SC16C752
Dual UART with 64-byte FIFO
Product data
Rev. 04 — 20 June 2003
9 of 47
9397 750 11635
Koninklijke Philips Electronics N.V. 2003. All rights reserved.
6.3 Software flow control
Software flow control is enabled through the enhanced feature register and the
modem control register. Different combinations of software flow control can be
enabled by setting different combinations of EFR[3:0].
Table 3
shows software flow
control options.
Remark:
When using software flow control, the Xon/Xoff characters cannot be used
for data characters.
There are two other enhanced features relating to software flow control:
Xon Any function (MCR[5]):
Operation will resume after receiving any character
after recognizing the Xoff character. It is possible that an Xon1 character is
recognized as an Xon Any character, which could cause an Xon2 character to be
written to the RX FIFO.
Special character (EFR[5]):
Incoming data is compared to Xoff2. Detection of the
special character sets the Xoff interrupt (IIR[4]) but does not halt transmission. The
Xoff interrupt is cleared by a read of the IIR. The special character is transferred to
the RX FIFO.
6.3.1
RX
When software flow control operation is enabled, the SC16C752 will compare
incoming data with Xoff1,2 programmed characters (in certain cases, Xoff1 and Xoff2
must be received sequentially). When the correct Xoff character are received,
transmission is halted after completing transmission of the current character. Xoff
detection also sets IIR[4] (if enabled via IER[5]) and causes INT to go HIGH.
To resume transmission, an Xon1,2 character must be received (in certain cases
Xon1 and Xon2 must be received sequentially). When the correct Xon characters are
received, IIR[4] is cleared, and the Xoff interrupt disappears.
Table 3:
EFR[3]
0
1
0
1
X
X
X
1
Software flow control options (EFR[0:3])
EFR[2]
EFR[1]
EFR[0]
0
X
X
0
X
X
1
X
X
1
X
X
X
0
0
X
1
0
X
0
1
0
1
1
TX, RX software flow controls
no transmit flow control
transmit Xon1, Xoff1
transmit Xon2, Xoff2
transmit Xon1, Xon2, Xoff1, Xoff2
no receive flow control
receiver compared Xon1, Xoff1
receiver compares Xon2, Xoff2
transmit Xon1, Xoff1
receiver compares Xon1 and Xon2, Xoff1 and Xoff2
transmit Xon2, Xoff2
receiver compares Xon1 and Xon2, Xoff1 and Xoff2
transmit Xon1, Xon2, Xoff1, Xoff2
receiver compares Xon1 and Xon2, Xoff1 and Xoff2
0
1
1
1
1
1
1
1
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SC16C752B 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:5 V, 3.3 V and 2.5 V dual UART, 5 Mbit/s (max.), with 64-byte FIFOs
SC16C752B_10 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:5 V, 2.2 V and 2.5 V dual UART, 5 Mbit/s (max.), with 64-byte FIFOs
SC16C752BIB48 制造商:NXP Semiconductors 功能描述:IC UART DUAL 64BYTE FIFO 16C752 制造商:NXP Semiconductors 功能描述:IC, UART, DUAL, 64BYTE FIFO, 16C752 制造商:NXP Semiconductors 功能描述:IC, UART, DUAL, 64BYTE FIFO, 16C752, No. of Channels:2, Data Rate:5Mbps, Supply Voltage Min:2.25V, Supply Voltage Max:5.5V, Digital IC Case Style:LQFP, No. of Pins:48, Operating Temperature Min:-40C, Operating Temperature Max:85C, , RoHS Compliant: Yes
SC16C752BIB48,128 功能描述:UART 接口集成電路 16CB 2.5V-5V 2CH RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 數(shù)據(jù)速率:3 Mbps 電源電壓-最大:3.6 V 電源電壓-最小:2.7 V 電源電流:20 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:LQFP-48 封裝:Reel
SC16C752BIB48,151 功能描述:UART 接口集成電路 16CB 2.5V-5V 2CH RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 數(shù)據(jù)速率:3 Mbps 電源電壓-最大:3.6 V 電源電壓-最小:2.7 V 電源電流:20 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:LQFP-48 封裝:Reel
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