CH7009A/B, CH7010A/B, CH7011A, CH7012A, CH7301A/B Encoder Registers Read/Write Operation Application Notes

PublishTime：2022-10-20

●The CH7009A/B, CH7010A/B, CH7011A, CH7012A, and CH7301A/B belong to the CH7009A/B encoders family. Each of these encoders contains a serial port, through which the control registers can be written to and read from. The serial port is a two-wire serial interface consisting of pins SPD (bidirectional) - Serial Port Data, and SPC - Serial Port Clock.
●The serial port clock line (SPC) is input only and is driven by the output buffer of the graphics controller device, which is the clock master in the system. The serial port data line (SPD) is either input to or output from the CH7009A/B family encoder depending on the write or read status. The data on the line can be transferred at speeds of up to 400 kbit/s. Figure 1 shows the connection of the serial port interface of CH7009A/B family.

Brand of Product：	Chrontel
Part#：	CH7009A 、 CH7009B 、 CH7010A 、 CH7010B 、 CH7011A 、 CH7012A 、 CH7301A 、 CH7301B 、 CH7009A family 、 CH7009B family More Part#
Product Category：	encoders More
Application：	More
Data Type：	Application note & Design Guide More
Safety & Environment Standards：	More
Operating Temperature：	Please see the document for details
Qualification Grade：	More
Qualification Approval：	More
Package：
Language：	English Chinese Chinese and English Japanese
Date of Creation：	5/15/2003
Version Number：	Rev. 13
Data Encoding：	AN-41
Data Size：	475 KB

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