can you please explain me the Logic /Idea behiand sending 4 bit data to 16X2 LCD module as it is operated with 8bit data pins? i am confused how will the LCD respond when it detects the missed nibble? or it will display wrong values or get wrong commands as it is getting 4 bit data instead of 8bit data?
can you please explain me the Logic /Idea behiand sending 4 bit data to 16X2 LCD module as it is operated with 8bit data pins? i am confused how will the LCD respond when it detects the missed nibble? or it will display wrong values or get wrong commands as it is getting 4 bit data instead of 8bit data?
hi,
During the LCD initialization sequence, you send a FUNCTION set Command Instruction to the LCD controller which prepares it for 4Bit operation.
[refer HD44780 LCD datasheet]
After that command you send Commands and Data as 4 Bit Nibbles. Each nibble is sent using the Enable pulse sequence.
If BUSY is used, the program waits until the LCD is not Busy and then sends the next nibble.
The High 4 bit lines of the LCD are used, D4 thru D7, High nibble first, then Low nibble.
CAN you please tell me about command that is sent to instruct the LCD that it should use only four bit data? and should only upper nibble of LCD is used for that purpose?
i am using JHD 164A LCD Module.
CAN you please tell me about command that is sent to instruct the LCD that it should use only four bit data? and should only upper nibble of LCD is used for that purpose?
CAN you please tell me about command that is sent to instruct the LCD that it should use only four bit data? and should only upper nibble of LCD is used for that purpose?
i am using JHD 164A LCD Module.