參數(shù)資料
型號: SC16C752BIBS,157
廠商: NXP Semiconductors
文件頁數(shù): 3/47頁
文件大?。?/td> 0K
描述: IC DUAL UART 64BYTE 32HVQFN
標(biāo)準(zhǔn)包裝: 2,450
通道數(shù): 2,DUART
FIFO's: 64 字節(jié)
電源電壓: 2.5V,3.3V,5V
帶自動流量控制功能:
帶故障啟動位檢測功能:
帶調(diào)制解調(diào)器控制功能:
安裝類型: 表面貼裝
封裝/外殼: 32-VFQFN 裸露焊盤
供應(yīng)商設(shè)備封裝: 32-HVQFN(5x5)
包裝: 托盤
其它名稱: 935276389157
SC16C752BIBS
SC16C752BIBS-ND
SC16C752B
All information provided in this document is subject to legal disclaimers.
NXP B.V. 2010. All rights reserved.
Product data sheet
Rev. 6 — 30 November 2010
11 of 47
NXP Semiconductors
SC16C752B
5 V, 2.2 V and 2.5 V dual UART, 5 Mbit/s (max.), with 64-byte FIFOs
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] = Fh) set to 60, and Xon threshold (TCR[7:4] = 8h) set to 32. Both have the
interrupt receive threshold (TLR[7:4] = Dh) set to 52.
UART 1 begins transmission and sends 52 characters, at which point UART2 will
generate an interrupt to its processor to service the receive FIFO, but assume the
interrupt latency is fairly long. UART1 will continue sending characters until a total of 60
characters have been sent. At this time, UART2 will transmit a 0Fh to UART1, informing
UART1 to halt transmission. UART1 will likely send the 61st character while UART2 is
sending the Xoff character. Now UART2 is serviced and the processor reads enough data
out of the receive FIFO that the level drops to 32. UART2 will now send a 0Dh to UART1,
informing UART1 to resume transmission.
Fig 7.
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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SC16C752IB48 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Dual UART with 64-byte FIFO
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