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参数资料
| 型号： | XR20M1280L40-0B-EB |
| 厂商： | Exar Corporation |
| 文件页数： | 17/63页 |
| 文件大小： | 0K |
| 描述： | EVAL BOARD FOR XR20M1280L40 |
| 产品培训模块： | XR21V141x Full-Speed USB UART Family UARTs with Integrated Level Shifters |
| 标准包装： | 1 |
| 主要目的： | 接口，UART |
| 已用 IC / 零件： | XR20M1280L40 |
| 已供物品： | 板 |
| 其它名称： | 1016-1627 |
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XR20M1280
24
I2C/SPI UART WITH 128-BYTE FIFO AND INTEGRATED LEVEL SHIFTERS
REV. 1.0.0
1.19
Infrared Mode
The M1280 UART includes the infrared encoder and decoder compatible to the IrDA (Infrared Data
Association) version 1.0 and 1.1. The IrDA 1.0 standard that stipulates the infrared encoder sends out a 3/16 of
a bit wide HIGH-pulse for each “0” bit in the transmit data stream with a data rate up to 115.2 Kbps. For the
IrDA 1.1 standard, the infrared encoder sends out a 1/4 of a bit time wide HIGH-pulse for each "0" bit in the
transmit data stream with a data rate up to 1.152 Mbps. This signal encoding reduces the on-time of the
infrared LED, hence reduces the power consumption. See Figure 19 below.
The infrared encoder and decoder are enabled by setting MCR register bit-6 to a ‘1’. With this bit enabled, the
infrared encoder and decoder is compatible to the IrDA 1.0 standard. For the infrared encoder and decoder to
be compatible to the IrDA 1.1 standard, SFR bit-3 will also need to be set to a ’1’ when EFR bit-4 is set to ’1’.
Likewise, the RX input assumes an idle level of logic zero from a reset and power up, see Figure 19.
Typically, the wireless infrared decoder receives the input pulse from the infrared sensing diode on the RX pin.
Each time it senses a light pulse, it returns a logic 1 to the data bit stream.
FIGURE 19. INFRARED TRANSMIT DATA ENCODING AND RECEIVE DATA DECODING
Character
Data Bits
St
ar
t
Stop
00
0
11
1
11
Bit Time
1/16 Clock Delay
IRdecoder-1
RX Data
Receive
IR Pulse
(RX pin)
Character
Data Bits
St
ar
t
St
op
00
0
11
1
11
TX Data
Transmit
IR Pulse
(TX Pin)
Bit Time
1/2 Bit Time
3/16 or 1/4 Bit Time
IrEncoder-1
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相关代理商/技术参数 |
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| XR20V2170 | 制造商:EXAR 制造商全称:EXAR 功能描述:I2C/SPI UART WITH 64-BYTE FIFO AND RS232 TRANSCEIVER |
| XR20V2170IL40 | 制造商:EXAR 制造商全称:EXAR 功能描述:I2C/SPI UART WITH 64-BYTE FIFO AND RS232 TRANSCEIVER |
| XR20V2170IL40-F | 功能描述:UART 接口集成电路 Transceiver 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 |
| XR20V2170L40-0A-EB | 功能描述:界面开发工具 Supports V2170 40pin QFN,I2C 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 |
| XR20V2170L40-0B-EB | 功能描述:UART 接口集成电路 Supports V2170 40pin QFN,SPI Interface 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 |
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