參數(shù)資料
型號： SC16C2550
廠商： NXP Semiconductors N.V.
英文描述： Dual UART with 16 bytes of transmit and receive FIFOs and infrared (IrDA) encoder/decoder
中文描述： 雙UART具有16字節(jié)的發(fā)送和接收FIFO和紅外線（IrDA）編碼器/解碼器
文件頁數(shù)： 19/46頁
文件大?。?/td> 603K
代理商： SC16C2550
Philips Semiconductors
SC16C2550
Dual UART with 16 bytes of transmit and receive FIFOs and IrDA
encoder/decoder
Product data
Rev. 03 — 19 June 2003
19 of 46
9397 750 11621
Koninklijke Philips Electronics N.V. 2003. All rights reserved.
7.2.2
IER versus Receive/Transmit FIFO polled mode operation
When FCR[0] = logic 1, resetting IER[0-3] enables the SC16C2550 in the FIFO
polled mode of operation. In this mode, interrupts are not generated and the user
must poll the LSR register for TX and/or RX data status. Since the receiver and
transmitter have separate bits in the LSR either or both can be used in the polled
mode by selecting respective transmit or receive control bit(s).
LSR[0] will be a logic 1 as long as there is one byte in the receive FIFO.
LSR[1-4] will provide the type of receive errors, or a receive break, if encountered.
LSR[5] will indicate when the transmit FIFO is empty.
LSR[6] will indicate when both the transmit FIFO and transmit shift register are
empty.
LSR[7] will show if any FIFO data errors occurred.
7.3 FIFO Control Register (FCR)
This register is used to enable the FIFOs, clear the FIFOs, set the receive FIFO
trigger levels, and select the DMA mode.
7.3.1
DMA mode
Mode 0 (FCR bit 3 = 0):
Set and enable the interrupt for each single transmit or
receive operation, and is similar to the 16C450 mode. Transmit Ready (TXRDY) on
PLCC44 and LQFP48 packages will go to a logic 0 whenever the FIFO (THR, if FIFO
is not enabled) is empty. Receive Ready (RXRDY) on PLCC44 and LQFP48
packages will go to a logic 0 whenever the Receive Holding Register (RHR) is loaded
with a character.
Mode 1 (FCR bit 3 = 1):
Set and enable the interrupt in a block mode operation. The
transmit interrupt is set when the transmit FIFO is empty. TXRDY on PLCC and
LQFP48 packages remains a logic 0 as long as one empty FIFO location is available.
The receive interrupt is set when the receive FIFO fills to the programmed trigger
level. However, the FIFO continues to fill regardless of the programmed level until the
FIFO is full. RXRDY on PLCC44 and LQFP48 packages transitions LOW when the
FIFO reaches the trigger level, and transitions HIGH when the FIFO empties.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
SC16C2550B 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:5 V, 3.3 V and 2.5 V dual UART, 5 Mbit/s (max.), with 16-byte FIFOs
SC16C2550B_07 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:5 V, 3.3 V and 2.5 V dual UART, 5 Mbit/s (max.), with 16-byte FIFOs
SC16C2550BIA44 功能描述:UART 接口集成電路 16CB 2.5V-5V 2CH UART 16B 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
SC16C2550BIA44,512 功能描述:UART 接口集成電路 16CB 2.5V-5V 2CH 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
SC16C2550BIA44,518 功能描述:UART 接口集成電路 2CH. UART 16B 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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