參數(shù)資料
型號(hào)： SC16C754BIA68
廠商： NXP Semiconductors N.V.
元件分類： 收發(fā)器
英文描述： 5 V, 3.3 V and 2.5 V quad UART, 5 Mbit-s (max.) with 64-byte FIFOs
封裝： SC16C754BIA68<SOT188-2 (PLCC68)|<<http://www.nxp.com/packages/SOT188-2.html<1<Always Pb-free,;SC16C754BIA68<SOT188-2 (PLCC68)|<<http://www.nxp.com/packages/SOT188-2.html&
文件頁數(shù)： 13/51頁
文件大小： 253K
代理商： SC16C754BIA68
SC16C754B_4
NXP B.V. 2008. All rights reserved.
Product data sheet
Rev. 04 — 6 October 2008
13 of 51
NXP Semiconductors
SC16C754B
5 V, 3.3 V and 2.5 V quad UART, 5 Mbit/s (max.) with 64-byte FIFOs
6.3.2
TX
Xoff1/Xoff2 character is transmitted when the RX FIFO has passed the
halt
trigger level
programmed in TCR[3:0].
Xon1/Xon2 character is transmitted when the RX FIFO reaches the
resume
trigger level
programmed in TCR[7:4].
The transmission of Xoff/Xon(s) follows the exact same protocol as transmission of an
ordinary byte from the FIFO. This means that even if the word length is set to be 5, 6, or 7
characters, then the 5, 6, or 7 least significant bits of Xoff1/Xoff2 and Xon1/Xon2 will be
transmitted. (Note that the transmission of 5, 6, or 7 bits of a character is seldom done, but
this functionality is included to maintain compatibility with earlier designs.)
It is assumed that software flow control and hardware flow control will never be enabled
simultaneously.
Figure 8
shows an example of software flow control.
6.3.3
Software flow control example
6.3.3.1
Assumptions
UART1 is transmitting a large text file to UART2. Both UARTs are using software flow
control with single character Xoff (0Fh) and Xon (0Dh) tokens. Both have Xoff threshold
(TCR[3:0] = F) set to 60, and Xon threshold (TCR[7:4] = 8) set to 32. Both have the
interrupt receive threshold (TLR[7:4] = D) set to 52.
Fig 8.
Software flow control example
TRANSMIT FIFO
PARALLEL-TO-SERIAL
SERIAL-TO-PARALLEL
Xon1 WORD
Xon2 WORD
Xoff1 WORD
Xoff2 WORD
RECEIVE FIFO
PARALLEL-TO-SERIAL
SERIAL-TO-PARALLEL
Xon1 WORD
Xon2 WORD
Xoff1 WORD
Xoff2 WORD
UART2
UART1
002aaa229
data
Xoff–Xon–Xoff
compare
programmed
Xon-Xoff
characters
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
SC16C754BIA68,512 功能描述:UART 接口集成電路 16CB 2.5V-5V 4CH 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
SC16C754BIA68,518 功能描述:UART 接口集成電路 4CH. UART 64B 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
SC16C754BIA68,529 功能描述:UART 接口集成電路 16CB 2.5V-5V 4CH 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
SC16C754BIA68512 制造商:NXP Semiconductors 功能描述:IC QUAD UART FIFO 5MBPS 5.5V LCC-68
SC16C754BIA68-S 功能描述:UART 接口集成電路 16CB 2.5V-5V 4CH UART 64B 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
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