công cụ tìm kiếm bảng dữ liệu linh kiện điện tử |
|
TL16C752 bảng dữ liệu(PDF) 7 Page - Texas Instruments |
|
TL16C752 bảng dữ liệu(HTML) 7 Page - Texas Instruments |
7 / 33 page TL16C752 3.3-V DUAL UART WITH 64-BYTE FIFO SLLS305 – MAY 1999 7 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 functional description (continued) 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 1 shows software flow control options. There are two other enhanced features relating to S/W flow control: – Xon Any Function [MCR950: Operation will resume after receiving any character after recognizing the Xoff character. NOTE: 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 R FIFO. Table 1. Software Flow Control Options EFR[0:3] BIT 3 BIT 2 BIT 1 BIT 0 Tx, Rx SOFTWARE FLOW CONTROLS 0 0 X X No transmit flow control 1 0 X X Transmit Xon1, Xoff1 0 1 X X Transmit Xon2, Xoff2 1 1 X X Transmit Xon1, Xon2: Xoff1, Xoff2 X X 0 0 No receive flow control X X 1 0 Receiver compares Xon1, Xoff1 X X 0 1 Receiver compares Xon2, Xoff2 1 0 1 1 Transmit Xon1, Xoff1 Receiver compares Xon1 and Xon2, Xoff1 and Xoff2 0 1 1 1 Transmit Xon2, Xoff2 Receiver compares Xon1 and Xon2, Xoff1 and Xoff2 1 1 1 1 Transmit Xon1, Xon2: Xoff1, Xoff2Xoff1 Receiver compares Xon1 and Xon2: Xoff1 and Xoff2 0 0 1 1 No transmit flow control Receiver compares Xon1 and Xon2: Xoff1 and Xoff2 RX When software flow control operation is enabled, the TL16C752 will compare incoming data with Xoff1/2 programmed characters (in certain cases Xoff1 and Xoff2 must be received sequentially1). 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 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. NOTE: If a Parity, Framing or Break error occurs while receiving a software flow control character, this character will be treated as normal data and will be written to the RCV FIFO. 1. When pairs of Xon/Xoff characters are programmed to occur sequentially, received Xon1/Xoff1 characters must be written to the Rx FIFO if the subsequent character is not Xon2/Xoff2. |
Số phần tương tự - TL16C752 |
|
Mô tả tương tự - TL16C752 |
|
|
Link URL |
Chính sách bảo mật |
ALLDATASHEET.VN |
Cho đến nay ALLDATASHEET có giúp ích cho doanh nghiệp của bạn hay không? [ DONATE ] |
Alldatasheet là | Quảng cáo | Liên lạc với chúng tôi | Chính sách bảo mật | Trao đổi link | Tìm kiếm theo nhà sản xuất 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 |