參數(shù)資料
型號(hào)： ST16C2450IQ48
廠商： EXAR CORP
元件分類： 微控制器/微處理器
英文描述： 2.97V TO 5.5V DUART
中文描述： 2 CHANNEL(S), 1.5M bps, SERIAL COMM CONTROLLER, PQFP48
封裝： 7 X 7 MM, 1 MM HEIGHT, TQFP-48
文件頁(yè)數(shù)： 8/29頁(yè)
文件大小： 315K
代理商： ST16C2450IQ48
ST16C2450
2.97V TO 5.5V DUART
á
REV. 4.0.0
8
The on-chip oscillator is designed to use an industry standard microprocessor crystal (parallel resonant,
fundamental frequency with 10-22 pF capacitance load, ESR of 20-120 ohms and 100 ppm frequency
tolerance) connected externally between the XTAL1 and XTAL2 pins (see
Figure 4
), with an external 500 k
to
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. Typical oscillator connections are shown in
Figure 4
. For
further reading on oscillator circuit please see application note DAN108 on EXAR’s web site.
2.7
Programmable Baud Rate Generator
A single baud rate generator is provided for the transmitter and receiver, allowing independent TX/RX channel
control. The programmable Baud Rate Generator is capable of operating with a crystal frequency or external
clock of up to 24 MHz.
The 2450 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 Baud Rate Generator divides the input 16X clock
by any divisor from 1 to 2
16
-1. 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.
Table 3
shows the standard data rates available with a 14.7456 MHz crystal or external clock at 16X sampling
rate. When using a non-standard frequency crystal or external clock, the divisor value can be calculated for
DLL/DLM with the following equation.
F
IGURE
4. T
YPICAL
OSCILLATOR
CONNECTIONS
divisor (decimal) = (XTAL1 clock frequency) / (serial data rate x 16)
C1
22-47 pF
C2
22-47 pF
Y1
1.8432 MHz
to
24 MHz
R1
0-120
(Optional)
R2
500 Κ 1 Μ
XTAL1
XTAL2
相關(guān)PDF資料
PDF描述
ST16C2451 2.97V TO 5.5V DUART
ST16C2552CJ44 DUAL ASYNCHRONOUS RECEIVER/TRANSMITTER WITH FIFOs
ST16C2552IJ44 DUAL ASYNCHRONOUS RECEIVER/TRANSMITTER WITH FIFOs
ST162552 DUAL ASYNCHRONOUS RECEIVER/TRANSMITTER WITH FIFOs
ST16C2552CJ 2.97V TO 5.5V DUAL UART WITH 16-BYTE FIFO
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ST16C2450IQ48-F 功能描述:UART 接口集成電路 DUAL UART 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
ST16C2450IQ48TR-F 制造商:Exar Corporation 功能描述:UART 2-CH 1Byte FIFO 3.3V/5V 48-Pin TQFP T/R 制造商:Exar Corporation 功能描述:ST16C2450IQ48TR-F
ST16C2451 制造商:EXAR 制造商全稱:EXAR 功能描述:2.97V TO 5.5V DUART
ST16C2550 制造商:EXAR 制造商全稱:EXAR 功能描述:2.97V TO 5.5V DUART WITH 16-BYTE FIFO
ST16C2550_04 制造商:EXAR 制造商全稱:EXAR 功能描述:2.97V TO 5.5V DUART WITH 16-BYTE FIFO
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