參數(shù)資料
型號(hào)： SC16C2550BIN40
廠商： NXP SEMICONDUCTORS
元件分類： 微控制器/微處理器
英文描述： 5 V, 3.3 V and 2.5 V dual UART, 5 Mbit/s (max.), with 16-byte FIFOs
中文描述： 2 CHANNEL(S), 5M bps, SERIAL COMM CONTROLLER, PDIP40
封裝： 0.600 INCH, PLASTIC, MO-015, SOT129-1, DIP-40
文件頁(yè)數(shù)： 17/42頁(yè)
文件大?。?/td> 200K
代理商： SC16C2550BIN40
Philips Semiconductors
SC16C2550B
5 V, 3.3 V and 2.5 V dual UART, 5 Mbit/s (max.), with 16-byte FIFOs
Product data
Rev. 02 — 14 December 2004
17 of 42
9397 750 14449
Koninklijke Philips Electronics N.V. 2004. All rights reserved.
7.2.1
IER versus Transmit/Receive FIFO interrupt mode operation
When the receive FIFO (FCR[0] = logic 1), and receive interrupts (IER[0] = logic 1)
are enabled, the receive interrupts and register status will reflect the following:
The receive RXRDY interrupt (Level 2 ISR interrupt) is issued to the external CPU
when the receive FIFO has reached the programmed trigger level. It will be cleared
when the receive FIFO drops below the programmed trigger level.
Receive FIFO status will also be reflected in the user accessible ISR register when
the receive FIFO trigger level is reached. Both the ISR register receive status bit
and the interrupt will be cleared when the FIFO drops below the trigger level.
The receive data ready bit (LSR[0]) is set as soon as a character is transferred
from the shift register (RSR) to the receive FIFO. It is reset when the FIFO is
empty.
When the Transmit FIFO and interrupts are enabled, an interrupt is generated
when the transmit FIFO is empty due to the unloading of the data by the TSR and
UART for transmission via the transmission media. The interrupt is cleared either
by reading the ISR register, or by loading the THR with new data characters.
7.2.2
IER versus Receive/Transmit FIFO polled mode operation
When FCR[0] = logic 1, resetting IER[0-3] enables the SC16C2550B 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
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
SC16C2550BIN40,112 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
SC16C2550IA44 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Dual UART with 16 bytes of transmit and receive FIFOs and infrared (IrDA) encoder/decoder
SC16C2550IA44,512 功能描述:UART 接口集成電路 16C 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
SC16C2550IA44,518 功能描述:UART 接口集成電路 16C 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
SC16C2550IA44,529 功能描述:UART 接口集成電路 16C 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
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