Show Posts

This section allows you to view all posts made by this member. Note that you can only see posts made in areas you currently have access to.

Messages - jojahn

Pages: [1]
Character LCDs / Re: NHD-C0216CIZ-FSW-FBW-3V3 unexpected I2C levels
« on: April 19, 2016, 06:25:34 PM »
Hi there,
I just got few displays in the mail. I tested two of them on I2C with different speeds, different pull-up resistors etc. I just can't get the ACK back.
I wrote a VB6 software and using my serial port to bit bang the traffic. It works fine with I/O Chips.... any idea?
I have a short "PING" version, where I just call the address and wait for the ACK or NACK with the last strobe. Then the counter is increased to the new address. As I said, it works fine with I/O chips.


One step further and the last LCD:
I checked the voltages: supply voltage 3.3volt. used 1uF capacitors for the boost, pin 1 (RST) to plus
With no SDA or SCL attached to the LCD it reads 1.38 volts. If I attach a 1k resistor to plus, the voltage is almost the same. During Idle time it is suppose to stay high

What is wrong here?

Is the pinout on the data sheet wrong? left to right = 1 to 8?

Can somebody help me, please?

Pages: [1]