参数资料
| 型号： | XR16C2850IM-F |
| 厂商： | Exar Corporation |
| 文件页数： | 24/51页 |
| 文件大小： | 0K |
| 描述： | IC UART FIFO 128B DUAL 48TQFP |
| 标准包装： | 250 |
| 特点： | * |
| 通道数： | 2，DUART |
| FIFO's： | 128 字节 |
| 规程： | RS232，RS485 |
| 电源电压： | 2.97 V ~ 5.5 V |
| 带自动流量控制功能： | 是 |
| 带IrDA 编码器/解码器： | 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： | 48-TQFP |
| 供应商设备封装： | 48-TQFP（7x7） |
| 包装： | 托盘 |
| 其它名称： | 1016-1275 |
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XR16C2850
xr
2.97V TO 5.5V DUAL UART WITH 128-BYTE FIFOS
REV. 2.1.3
30
MCR[3]: OP2# Output / INT Output Enable
This bit enables and disables the operation of INT, interrupt output. If INT output is not used, OP2# can be
used as a general purpose output.
Logic 0 = INT (A-B) outputs disabled (three state mode) and OP2# output is HIGH (default).
Logic 1 = INT (A-B) outputs enabled (active mode) and OP2# output is LOW.
MCR[4]: Internal Loopback Enable
Logic 0 = Disable loopback mode (default).
Logic 1 = Enable local loopback mode, see loopback section and Figure 13.
MCR[5]: Xon-Any Enable
Logic 0 = Disable Xon-Any function (for 16C550 compatibility, default).
Logic 1 = Enable Xon-Any function. In this mode, any RX character received will resume transmit operation.
The RX character will be loaded into the RX FIFO , unless the RX character is an Xon or Xoff character and
the 2850 is programmed to use the Xon/Xoff flow control.
MCR[6]: Infrared Encoder/Decoder Enable
Logic 0 = Enable the standard modem receive and transmit input/output interface (default).
Logic 1 = Enable infrared IrDA receive and transmit inputs/outputs. The TX/RX output/input are routed to the
infrared encoder/decoder. The data input and output levels conform to the IrDA infrared interface
requirement. While in this mode, the infrared TX output will be LOW during idle data conditions.
MCR[7]: Clock Prescaler Select
Logic 0 = Divide by one. The input clock from the crystal or external clock is fed directly to the Programmable
Baud Rate Generator without further modification, i.e., divide by one (default).
Logic 1 = Divide by four. The prescaler divides the input clock from the crystal or external clock by four and
feeds it to the Programmable Baud Rate Generator, hence, data rates become one forth.
4.8
Line Status Register (LSR) - Read Only
This register provides the status of data transfers between the UART and the host. If IER bit-2 is set to a logic
1, an LSR interrupt will be generated immediately when any character in the RX FIFO has an error (parity,
framing, overrun, break).
LSR[0]: Receive Data Ready Indicator
Logic 0 = No data in receive holding register or FIFO (default).
Logic 1 = Data has been received and is saved in the receive holding register or FIFO.
LSR[1]: Receiver Overrun Error Flag
Logic 0 = No overrun error (default).
Logic 1 = Overrun error. A data overrun error condition occurred in the receive shift register. This happens
when additional data arrives while the FIFO is full. In this case the previous data in the receive shift register
is overwritten. Note that under this condition the data byte in the receive shift register is not transferred into
the FIFO, therefore the data in the FIFO is not corrupted by the error. If IER bit-2 is set, an interrupt will be
generated immediately.
LSR[2]: Receive Data Parity Error Tag
Logic 0 = No parity error (default).
Logic 1 = Parity error. The receive character in RHR does not have correct parity information and is suspect.
This error is associated with the character available for reading in RHR.
相关PDF资料 |
PDF描述 |
|---|---|
| XR16C2852IJ-F | IC UART FIFO 128B 44PLCC |
| XR16C850IMTR-F | IC UART FIFO 128B 48TQFP |
| XR16C854IQ-F | IC UART FIFO 128B QUAD 100QFP |
| XR16C864IQ-F | IC UART FIFO 128B QUAD 100QFP |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| XR16C2850IMTR-F | 制造商:Exar Corporation 功能描述:XR16C2850IMTR-F |
| XR16C2850IP | 制造商:EXAR 制造商全称:EXAR 功能描述:DUAL UART WITH 128-byte FIFO’s AND RS-485 HALF DUPLEX CONTROL |
| XR16C2850IP40 | 制造商:EXAR 制造商全称:EXAR 功能描述:3.3V AND 5V DUART WITH 128-BYTE FIFO |
| XR16C2852 | 制造商:EXAR 制造商全称:EXAR 功能描述:2.97V TO 5.5V DUAL UART WITH 128-BYTE FIFOS |
| XR16C2852_05 | 制造商:EXAR 制造商全称:EXAR 功能描述:2.97V TO 5.5V DUAL UART WITH 128-BYTE FIFOS |
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