- 您现在的位置：买卖IC网 > PDF目录3765 > SC16C550BIA44,512 (NXP Semiconductors)IC UART SINGLE W/FIFO 44-PLCC PDF资料下载
参数资料
| 型号： | SC16C550BIA44,512 |
| 厂商： | NXP Semiconductors |
| 文件页数： | 3/48页 |
| 文件大小： | 0K |
| 描述： | IC UART SINGLE W/FIFO 44-PLCC |
| 标准包装： | 26 |
| 特点： | 可编程 |
| 通道数： | 1，UART |
| FIFO's： | 16 字节 |
| 电源电压： | 2.5V，3.3V，5V |
| 带自动流量控制功能： | 是 |
| 带故障启动位检测功能： | 是 |
| 带调制解调器控制功能： | 是 |
| 带CMOS： | 是 |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 44-LCC（J 形引线） |
| 供应商设备封装： | 44-PLCC |
| 包装： | 管件 |
| 其它名称： | 935274387512 SC16C550BIA44 SC16C550BIA44-ND |
第1页第2页当前第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页
SC16C550B_5
NXP B.V. 2008. All rights reserved.
Product data sheet
Rev. 05 — 1 October 2008
11 of 48
NXP Semiconductors
SC16C550B
5 V, 3.3 V and 2.5 V UART with 16-byte FIFOs
6.3 Autoow control
Autoow control is comprised of auto-CTS and auto-RTS (see Figure 6). With auto-CTS,
the CTS input must be active before the transmitter FIFO can emit data. With auto-RTS,
RTS becomes active when the receiver needs more data and noties the sending serial
device. When RTS is connected to CTS, data transmission does not occur unless the
receiver FIFO has space for the data; thus, overrun errors are eliminated using UART 1
and UART 2 from a SC16C550B with the autoow control enabled. If not, overrun errors
occur when the transmit data rate exceeds the receiver FIFO read latency.
6.3.1 Auto-RTS
Auto-RTS data ow control originates in the receiver timing and control block (refer to
Figure 1 “Block diagram of SC16C550B”) and is linked to the programmed receiver FIFO
trigger level (see Figure 6). When the receiver FIFO level reaches a trigger level of 1, 4,
or 8 (see Figure 8), RTS is de-asserted. With trigger levels of 1, 4, and 8, the sending
UART may send an additional byte after the trigger level is reached (assuming the
sending UART has another byte to send) because it may not recognize the de-assertion of
RTS until after it has begun sending the additional byte. RTS is automatically reasserted
once the RX FIFO is emptied by reading the receiver buffer register. When the trigger level
is 14 (see Figure 9), RTS is de-asserted after the rst data bit of the 16th character is
present on the RX line. RTS is reasserted when the RX FIFO has at least one available
byte space.
6.3.2 Auto-CTS
The transmitter circuitry checks CTS before sending the next data byte (see Figure 6).
When CTS is active, it sends the next byte. To stop the transmitter from sending the
following byte, CTS must be released before the middle of the last stop bit that is currently
being sent (see Figure 7). The auto-CTS function reduces interrupts to the host system.
When ow control is enabled, CTS level changes do not trigger host interrupts because
the device automatically controls its own transmitter. Without auto-CTS, the transmitter
sends any data present in the transmit FIFO and a receiver overrun error may result.
Fig 6.
Autoow control (auto-RTS and auto-CTS) example
RX
FIFO
FLOW
CONTROL
TX
FIFO
PARALLEL
TO SERIAL
TX
FIFO
RX
FIFO
UART 1
UART 2
D7 to D0
RX
TX
RTS
CTS
TX
RX
CTS
RTS
D7 to D0
002aaa228
SERIAL TO
PARALLEL
SERIAL TO
PARALLEL
FLOW
CONTROL
FLOW
CONTROL
FLOW
CONTROL
PARALLEL
TO SERIAL
相关PDF资料 |
PDF描述 |
|---|---|
| SC16C550BIA44,518 | IC UART SINGLE W/FIFO 44-PLCC |
| SC16IS750IPW,128 | IC UART I2C/SPI 24-TSSOP |
| SC16IS740IPW/Q900, | IC UART SINGLE W/FIFO 16-TSSOP |
| XR16L788CQ-F | IC UART 64B 3.3V OCTAL 100QFP |
| XR16C864CQ-F | IC UART FIFO 128B QUAD 100QFP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| SC16C550BIA44-S | 功能描述:UART 接口集成电路 16CB 2.5V-5V 1CH UART 16B FIFO RoHS:否 制造商:Texas Instruments 通道数量:2 数据速率:3 Mbps 电源电压-最大:3.6 V 电源电压-最小:2.7 V 电源电流:20 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:LQFP-48 封装:Reel |
| SC16C550BIB48 | 功能描述:UART 接口集成电路 16CB 2.5V-5V 1CH UART 16B FIFO RoHS:否 制造商:Texas Instruments 通道数量:2 数据速率:3 Mbps 电源电压-最大:3.6 V 电源电压-最小:2.7 V 电源电流:20 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:LQFP-48 封装:Reel |
| SC16C550BIB48,128 | 功能描述:UART 接口集成电路 16CB 2.5V-5V 1CH UART 16B FIFO RoHS:否 制造商:Texas Instruments 通道数量:2 数据速率:3 Mbps 电源电压-最大:3.6 V 电源电压-最小:2.7 V 电源电流:20 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:LQFP-48 封装:Reel |
| SC16C550BIB48,151 | 功能描述:UART 接口集成电路 1CH. UART 16B FIFO RoHS:否 制造商:Texas Instruments 通道数量:2 数据速率:3 Mbps 电源电压-最大:3.6 V 电源电压-最小:2.7 V 电源电流:20 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:LQFP-48 封装:Reel |
| SC16C550BIB48,157 | 功能描述:UART 接口集成电路 16CB 2.5V-5V 1CH RoHS:否 制造商:Texas Instruments 通道数量:2 数据速率:3 Mbps 电源电压-最大:3.6 V 电源电压-最小:2.7 V 电源电流:20 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:LQFP-48 封装:Reel |
发布紧急采购，3分钟左右您将得到回复。