求对芯片英文分析
时间：10-02
整理：3721RD
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在文档里面，写着这样的一段
The I2C bus uses two wires to transfer information between devices connected
to the bus: “SCL” (serial clock line) and “SDA” (serial data line). The I2C
component requires the use of external open-drain buffers since it has only
unidirectional ports. The “SDA” and “SCL” lines referred further are the actual
I2C bus signals, while the I2C component is connected to them with the use of
open-drains (“SDAO” as output and “SDAI” as input, “SCLO” as output and
“SCLI” as input). Each device connected to the bus is software addressable by a
unique address. The I2C is a true multi-master bus including collision detection
and arbitration to prevent data corruption if two or more masters simultaneously
initiate data transfer. The filtering logic rejects spikes on the bus data line to
preserve data integrity.
请问各位，这两个IO是不是还要接什么东西么?我现在直接使用芯片的IO，操作没有I2C的信号出来。
The I2C bus uses two wires to transfer information between devices connected
to the bus: “SCL” (serial clock line) and “SDA” (serial data line). The I2C
component requires the use of external open-drain buffers since it has only
unidirectional ports. The “SDA” and “SCL” lines referred further are the actual
I2C bus signals, while the I2C component is connected to them with the use of
open-drains (“SDAO” as output and “SDAI” as input, “SCLO” as output and
“SCLI” as input). Each device connected to the bus is software addressable by a
unique address. The I2C is a true multi-master bus including collision detection
and arbitration to prevent data corruption if two or more masters simultaneously
initiate data transfer. The filtering logic rejects spikes on the bus data line to
preserve data integrity.
请问各位，这两个IO是不是还要接什么东西么?我现在直接使用芯片的IO，操作没有I2C的信号出来。
各上拉2.2k到电源，
是不是IO口接一个2.2K的电阻，然后，电阻再接电源?
求指导
看不懂
查了下，http://m.blog.csdn.net/blog/mick_ye/20553141 这里有个说明
自己网上查了下，问了下同事，说一般都加上拉电阻，其阻值4.7K或者10K， 然后在网上查了下http://m.blog.csdn.net/blog/mick_ye/20553141这里有个说明。我用的这个芯片，内含有上拉电阻，但实际的阻值有多大没看到，可能没细看或者文档没写到。
对的，你可以搜下I2C的定义及接法