 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
SC16IS740 Datasheet(PDF) 12 Page - NXP Semiconductors |
|
|
|||||||||||||||||||||||||||||
SC16IS740 Datasheet(HTML) 12 Page - NXP Semiconductors |
|
|
12 / 63 page  SC16IS740_750_760 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2011. All rights reserved. Product data sheet Rev. 7 — 9 June 2011 12 of 63 NXP Semiconductors SC16IS740/750/760 Single UART with I2C-bus/SPI interface, 64-byte FIFOs, IrDA SIR There are two other enhanced features relating to software flow control: • Xon Any function (MCR[5]): Receiving any character will resume operation 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. 7.3.1 RX When software flow control operation is enabled, the SC16IS740/750/760 will compare incoming data with Xoff1/Xoff2 programmed characters (in certain cases, Xoff1 and Xoff2 must be received sequentially). When the correct Xoff characters 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 IRQ to go LOW. To resume transmission, an Xon1/Xon2 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. 7.3.2 TX Xoff1/Xoff2 character is transmitted when the RX FIFO has passed the HALT trigger level programmed in TCR[3:0] or the selectable trigger level in FCR[7:6] Xon1/Xoff2 character is transmitted when the RX FIFO reaches the RESUME trigger level programmed in TCR[7:4] or RX FIFO falls below the lower selectable trigger level in FCR[7:6]. The transmission of Xoff/Xon(s) follows the exact same protocol as transmission of an ordinary character from the FIFO. This means that even if the word length is set to be 5, 6, or 7 bits, then the 5, 6, or 7 least significant bits of XOFF1/XOFF2 or 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 11 shows an example of software flow control. |
Similar Part No. - SC16IS740_11 |
|
Similar Description - SC16IS740_11 |
|
|
Link URL |
| Privacy Policy |
| ALLDATASHEET.COM |
| Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Datasheet Upload | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
| Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
|
Family Site : ic2ic.com |
icmetro.com |
English ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
