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參數(shù)資料
| 型號： | ST16C2450IQ48-F |
| 廠商： | Exar Corporation |
| 文件頁數(shù)： | 28/30頁 |
| 文件大小： | 0K |
| 描述： | IC UART FIFO DUAL 48TQFP |
| 標準包裝： | 250 |
| 特點： | * |
| 通道數(shù)： | 2，DUART |
| FIFO's： | 1 字節(jié) |
| 規(guī)程： | RS232 |
| 電源電壓： | 2.97 V ~ 5.5 V |
| 帶故障啟動位檢測功能： | 是 |
| 帶調(diào)制解調(diào)器控制功能： | 是 |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 48-TQFP |
| 供應(yīng)商設(shè)備封裝： | 48-TQFP（7x7） |
| 包裝： | 托盤 |
| 其它名稱： | 1016-1670 ST16C2450IQ48-F-ND |
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xr
ST16C2450
REV. 4.0.1
2.97V TO 5.5V DUART
7
2.5
INTA and INTB Outputs
The INTA and INTB interrupt output changes according to the operating mode and enhanced features setup.
Table 2 summarizes the operating behavior for the transmitter and receiver. Also see Figure 12 and Figure 13.
2.6
Crystal Oscillator or External Clock Input
The 2450 includes an on-chip oscillator (XTAL1 and XTAL2) to produce a clock for both UART sections in the
device. The CPU data bus does not require this clock for bus operation. The crystal oscillator provides a
system clock to the Baud Rate Generators (BRG) section found in each of the UART. XTAL1 is the input to the
oscillator or external clock buffer input with XTAL2 pin being the output. See “Programmable Baud Rate
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.
TABLE 2: INTA AND INTB PINS OPERATION FOR TRANSMITTER
TRANSMITTER
RECEIVER
INTA/B Pin
0 = a byte in THR
1 = THR empty
0 = no data
1 = 1 byte
FIGURE 4. TYPICAL OSCILLATOR CONNECTIONS
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
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 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 |
| ST16C2550CJ-0A-EB | 功能描述:界面開發(fā)工具 Supports C2550 44 ld PLCC, ISA Interface RoHS:否 制造商:Bourns 產(chǎn)品:Evaluation Boards 類型:RS-485 工具用于評估:ADM3485E 接口類型:RS-485 工作電源電壓:3.3 V |
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