參數(shù)資料
型號： NS16C2752
廠商： National Semiconductor Corporation
英文描述： Dual UART with 16-byte/64-byte FIFOs and up to 5 Mbit/s Data Rate
中文描述： 雙UART與16-byte/64-byte FIFO和高達(dá)5 Mbit / s的數(shù)據(jù)速率
文件頁數(shù)： 25/43頁
文件大?。?/td> 881K
代理商： NS16C2752
6.0 Register Set
(Continued)
6.14 ENHANCED FEATURE REGISTER (EFR)
This register enables the enhanced features of the device.
TABLE 20. EFR (0x2, LCR = 0xBF)
Bit
7
Bit Name
Default
Auto CTS
Flow Ctl
Ena
R/W
Def
R/W
0
Description
Automatic CTS Flow Control Enable
1 = Enable automatic CTS flow control. Data transmission stops when CTS input deasserts to
logic 1. Data transmission resumes when CTS returns to logic 0.
0 = Automatic CTS flow control is disabled (Default)
Automatic RTS Flow Control Enable
By setting EFR[6] to logic 1, RTS output can be used for hardware flow control. When Auto
RTS is selected, an interrupt is generated when the receive FIFO is filled to the programmed
trigger level and RTS de-asserts to a logic 1. The RTS output must be logic 0 before the auto
RTS can take effect. RTS pin functions as a general purpose output when hardware flow
control is disabled.
1 = Enable automatic RTS flow control.
0 = Automatic RTS flow control is disabled (Default)
Special Character Detect Enable
1 = Special character detect enabled. The UART compares each incoming received character
with data in Xoff-2 register (0x4, LCR = 0xBF). If a match is found, the received data will be
transferred to FIFO and IIR[4] is set to indicate the detection of a special character if IER[5] =
1. Bit 0 corresponds with the LSB of the received character. If flow control is set for
comparing Xon1, Xoff1 (EFR[1:0] = 10) then flow control and special character work normally;
If flow control is set for comparing Xon2, Xoff2 (EFR[1:0]=01) then flow control works
normally, but Xoff2 will not go to the FIFO, and will generate an Xoff interrupt and a special
character interrupt if IER[5] is enabled. Special character interrupts are cleared automatically
after the next received character.
0 = Special character detect disabled. (Default)
Enhanced Function Bits Enable
This bit enables IER[7:4], FCR[5:4], and MCR [7:5] to be changed. After changing the
enhanced bits, EFR[4] can be cleared to logic 0 to latch in the updated values. EFR[4] allows
compatibility with the legacy mode software by disabling alteration of the enhanced functions.
1 = Enables writing to IER[7:4], FCR[5:4], and MCR [7:5].
0 = Disable writing to IER[7:4], FCR[5:4], MCR [7:5] and, latching in updated value. Upon
reset, IER[7:4], IIR[5:4], FCR[5:4], and MCR [7:5] are cleared to logic 0. (Default)
6
Auto RTS
Flow Ctl
Ena
R/W
0
5
Special
Char Det
Ena
R/W
0
4
Enhanced
Fun Bit
Ena
R/W
0
N
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相關(guān)PDF資料
PDF描述
NS16C2752TVA Dual UART with 16-byte/64-byte FIFOs and up to 5 Mbit/s Data Rate
NS32203D DIRECT MEMORY ACCESS CONTROLLER
NS32203N DIRECT MEMORY ACCESS CONTROLLER
NS32382-10 MEMORY MANAGEMENT UNITS
NS32382-15 MEMORY MANAGEMENT UNITS
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
NS16C2752TVA 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Dual UART with 16-byte/64-byte FIFOs and up to 5 Mbit/s Data Rate
NS16C2752TVA/NOPB 功能描述:UART 接口集成電路 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
NS16C2752TVAX/NOPB 功能描述:UART 接口集成電路 Dual UART w/ 64-byte FIFO 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
NS16C2752TVS 制造商:Texas Instruments 功能描述:UART 2-CH 64Byte FIFO 3.3V/5V 48-Pin TQFP
NS16C2752TVS/NOPB 功能描述:UART 接口集成電路 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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