Update procedure¶

COG Power On¶

Environment and PSR¶

TSSET is the temperature value (Celsius)
The highest bit of the data represents positive/negative value
- Positive means the data is equal to the temperature value
- Negative means the data is a 2’s complement of the temperature value

Temperature	Hex Value
25 C	0x19
5 C	0x05
-5 C	0xFB

PSR: 2 bytes

EPD Size	Data
4.2"	0x0F, 0x89	0x89
Other sizes	0xCF, 0x8D	0x8D

Upload Image Data¶

This section describes how to send the image data into the COG driver which will update the display. EDP need to receive both First and Second frame data each updating. The index of the first frame is 0x10 and the second frame is 0x13.

The data of image frame, one bit represents 1 pixel. (e.g. the first byte represents the 1^st ~ 8^th pixels of the first line, the second byte represents the 9^th ~ 16^th pixels of the first line, …… and so on).