- 您现在的位置：买卖IC网 > PDF目录384931 > ST16C2550 (Exar Corporation) Dual UART with 16-Byte of Transmit and Receive FIFO(双通用异步接收器/发送器（带16字节接收和发送先进先出）) PDF资料下载
参数资料
| 型号： | ST16C2550 |
| 厂商： | Exar Corporation |
| 英文描述： | Dual UART with 16-Byte of Transmit and Receive FIFO(双通用异步接收器/发送器（带16字节接收和发送先进先出）) |
| 中文描述： | 双UART具有16的发送和接收FIFO（双通用异步接收器/发送器（带16字节接收和发送先进先出字节）） |
| 文件页数： | 10/34页 |
| 文件大小： | 314K |
| 代理商： | ST16C2550 |
第1页第2页第3页第4页第5页第6页第7页第8页第9页当前第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
ST16C2550
10
Rev. 3.40
with parity and one stop bit, the time out will be:
T = 4 X 7(programmed word length) + 12 = 40 bit times.
Character time = 40 / 10 [ (programmed word length =
7) + (parity = 1) + (stop bit = 1) + (start bit = 1) = 4
characters.
Programmable Baud Rate Generator
The 2550 supports high speed modem technologies
that have increased input data rates by employing
data compression schemes. For example a 33.6Kbps
modem that employs data compression may require a
115.2Kbps input data rate. A 128.0Kbps ISDN modem
that supports data compression may need an input
data rate of 460.8Kbps. The 2550 can support a
standard data rate of 921.6Kbps.
A single baud rate generator is provided for the trans-
mitter and receiver, allowing independent TX/RX chan-
nel control. The programmable Baud Rate Generator is
capable of operating with a crystal frequency of up to 24
MHz. However, with an external clock input on XTAL1
pin and a 2K ohms pull-up resistor on XTAL2 pin it can
extend its operation up to 64 MHz ( 4Mbps serial data
rate) at room temperature and 5.0V. To obtain maxi-
mum data rate, it is necessary to use full rail swing on
the clock input. See external clock operating frequency
over power supply voltage chart on next page.
The 2550
can be configured for internal or external clock opera-
tion. For internal clock oscillator operation, an industry
standard microprocessor crystal (parallel resonant/ 22-
33 pF load) is connected externally between the XTAL1
and XTAL2 pins, with an external 1 M
resistor across
it. Alternatively, an external clock can be connected to
the XTAL1 pin to clock the internal baud rate generator
for standard or custom rates. (see Baud Rate Generator
Programming).
The generator divides the input 16X clock by any divisor
from 1 to 2
16
-1. The 2550 divides the basic external
clock by 16. The basic 16X clock provides table rates to
support standard and custom applications using the
same system design. The rate table is configured via the
DLL and DLM internal register functions. Customized
Baud Rates can be achieved by selecting the proper
divisor values for the MSB and LSB sections of baud rate
generator.
Programming the Baud Rate Generator Registers
DLM (MSB) and DLL (LSB) provides a user capability
for selecting the desired final baud rate. The example
in Table 4 below, shows the selectable baud rate table
available when using a 1.8432 MHz external clock input.
Crystal Oscillator Connection
C1
22-47pF
C2
22-47pF
Y1
1.8432 MHz
50-120
R2
1M
X
X
R1
2K
XTAL1
XTAL2
R1
VCC
External Clock
vcc
gnd
External Clock Connection for Extended Data Rate
相关PDF资料 |
PDF描述 |
|---|---|
| ST16C2552 | Dual UART with 16-Byte Transmit and Receive FIFO(双通用异步接收器/发送器（带16字节接收和发送先进先出）) |
| ST16C450 | UNIVERSAL ASYNCHRONOUS RECEIVER/TRANSMITTER (UART) |
| ST16C450CJ44 | UNIVERSAL ASYNCHRONOUS RECEIVER/TRANSMITTER (UART) |
| ST16C450CP40 | UNIVERSAL ASYNCHRONOUS RECEIVER/TRANSMITTER (UART) |
| ST16C450CQ48 | UNIVERSAL ASYNCHRONOUS RECEIVER/TRANSMITTER (UART) |
相关代理商/技术参数 |
参数描述 |
|---|---|
| ST16C2550_04 | 制造商:EXAR 制造商全称:EXAR 功能描述:2.97V TO 5.5V DUART WITH 16-BYTE FIFO |
| ST16C2550CJ-0A-EB | 功能描述:界面开发工具 Supports C2550 44 ld PLCC, ISA Interface RoHS:否 制造商:Bourns 产品:Evaluation Boards 类型:RS-485 工具用于评估:ADM3485E 接口类型:RS-485 工作电源电压:3.3 V |
| ST16C2550CJ44 | 制造商:EXAR 制造商全称:EXAR 功能描述:2.97V TO 5.5V DUART WITH 16-BYTE FIFO |
| ST16C2550CJ44-F | 功能描述:UART 接口集成电路 2.97V-5.5V 16B FIFO temp 0C to 70C; UART 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 |
| ST16C2550CJ44TR-F | 功能描述:UART 接口集成电路 DUAL UART W/16BYTE 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 |
发布紧急采购，3分钟左右您将得到回复。