Newhaven Display Forum

Newhaven Products => OLEDs => Topic started by: NHD2.23_I2C on April 05, 2015, 10:14:17 PM

Title: Continuation Bit SSD1305
Post by: NHD2.23_I2C on April 05, 2015, 10:14:17 PM
What is the continuation bit used for?
From the SSD1305 manual it seems like only 2 control bytes can be used.
1. for commands 0x80h
2. for data going to GDDRAM 0x40h

I2C - bus write protocol is shown on page 22.
How can you read back the value of a register to make sure you have set is properly?
I did not see a read from Device Protocol at all in the manual so that a specific register can be read from.
Title: Re: Continuation Bit SSD1305
Post by: Paul_B on April 28, 2015, 08:33:27 AM
Hello,

The CO (Continuation) signal is just telling the display that there is going to be continuous I2C transmission. Rather than sending a start condition before each byte.
 
You can think of CO as a short cut,  e.g. instead of sending a start condition every time you wish to send continuous data you just set CO.  8)