参数资料
型号: XR20M1170L16-0A-EB
厂商: Exar Corporation
文件页数: 56/56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
9
REV. 1.1.0
I2C/SPI UART WITH 64-BYTE FIFO
2.1.2
SPI Bus Interface
The SPI interface consists of four lines: serial clock (SCL), chip select (CS#), slave output (SO) and slave input
(SI). The serial clock, slave output and slave input can be as fast as 18 MHz at 3.3V. To access the device in
the SPI mode, the CS# signal for the M1170 is asserted by the SPI master, then the SPI master starts toggling
the SCL signal with the appropriate transaction information. The first bit sent by the SPI master includes
whether it is a read or write transaction and the UART register being accessed. See Table 3 below.
TABLE 3: SPI FIRST BYTE FORMAT
BIT
FUNCTION
7
Read/Write#
Logic 1 = Read
Logic 0 = Write
6:3
UART Internal Register Address A3:A0
2:1
UART Channel Select
’00’ = UART Channel A, other values are reserved
0
Reserved
FIGURE 7. SPI WRITE
R/W A3 A2 A1 A0
0
X
D7 D6 D5 D4 D3 D2 D1 D0
SCLK
SI
FIGURE 8. SPI READ
R/W A3A2A1A0
0
X
D7 D6 D5 D4 D3 D2 D1 D0
SCLK
SI
SO
The 64 byte TX FIFO can be loaded with data or 64 byte RX FIFO data can be unloaded in one SPI write or
read sequence.
FIGURE 9. SPI FIFO WRITE
R /W A 3
A 2
A 1
A 0
0
X
D7
D6
D5
D4
D3
D2
D1
D0
D7
D6
D5
D4
D 3
D 2
D 1
D 0
SC L K
SO
la s t b it
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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