Newhaven Display Forum

Newhaven Products => Character LCDs => Topic started by: shalongbasi on August 20, 2015, 10:26:06 AM

Title: I2C proglem
Post by: shalongbasi on August 20, 2015, 10:26:06 AM
I am trying to send command to NHD-0220D3Z-FL-GBW-V3 by I2C interface. from the scope, I found that  it is ACKed when first byte 0xA0 (address 0x50 + write) was sent out, but second byte 0xfe is NACKed. what could be wrong? according datasheet 0xfe is prefix of every command, how could it be rejected? thanks for help.