参数资料
型号: XR20M1170L16-0A-EB
厂商: Exar Corporation
文件页数: 13/56页
文件大小: 0K
描述: EVAL BOARD FOR XR20M1170 16QFN
标准包装: 1
主要目的: 接口,UART
嵌入式:
已用 IC / 零件: XR20M1170
次要属性: I²C & SPI 接口
已供物品:
其它名称: 1016-1618
XR20M1170L16-0A-EB-ND
XR20M1170
20
I2C/SPI UART WITH 64-BYTE FIFO
REV. 1.1.0
2.15
Infrared Mode
The M1170 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 18 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, EFCR bit-7 will also need to be set to a ’1’. When the infrared feature
is enabled, the transmit data output, TX, idles LOW. Likewise, the RX input also idles LOW, see Figure 18.
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.
After power-up, the infrared mode can be controlled via MCR bit-6.
FIGURE 18. INFRARED TRANSMIT DATA ENCODING AND RECEIVE DATA DECODING
Character
Data Bits
Star
t
Sto
p
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
Character
Data Bits
St
ar
t
St
op
00
0
11
1 1
1
Bit Time
1/16 Clock Delay
IRdecoder-1
RX Data
Receive
IR Pulse
(RX pin)
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相关代理商/技术参数
参数描述
XR20M1170L16-0B-EB 功能描述:UART 接口集成电路 Supports M1170 16pin 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
XR20M1170L24-0A-EB 功能描述:UART 接口集成电路 Supports M1170 24pin QFN, I2C 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
XR20M1170L24-0B-EB 功能描述:UART 接口集成电路 Supports M1170 28pin 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
XR20M1170L28-0A-EB 功能描述:UART 接口集成电路 Supports M1170 28pin QFN, I2C 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
XR20M1170L28-0B-EB 功能描述:界面开发工具 Supports M1170 28pin QFN, SPI 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