CH224K test QC2.0 protocol 9V+E-Mark function

韵湖葱白

CH224K test QC2.0 protocol 9V+E-Mark function [Copy link]

 

Ask for forgiveness

In fact, I had already received the board a long time ago, printed out the chip manual, and read it many times.

I had already bought the USB female port and Type C head, but I was on a business trip for a long time and had no time to fix it.

I took a weekend off to summarize the content of my previous tests and share it with you as an explanation, (o°ω°o), and manually ask for forgiveness.

In total, I received one CH224K evaluation board and five CH221K chips (I plan to make it into a test board, so the resistance method is the resistance method, which is simple and reliable).

A brief introduction to CH22*

Summary in one sentence:

1. 221K is the basic version, only supports PD, and is a resistor configuration method (I like it, simple)
2. 224K is the elite version, supports QC, PD, and can be configured in voltage and resistance mode (the development board is 224K, supports QC)
3. 224D is the deluxe version, supporting QC, PD, can be configured in voltage mode and resistance mode, can also detect current, and can drive MOS (I don’t understand the world of the rich)

The development board is 224K, so I’ll use the official picture:

My test environment:

QC 9V trigger test - Redmi note pro9 charger

Connect a 6.8K resistor to R3.

I use a Xiaomi charger (Redmi Note Pro 9), which supports the following protocols:

The triggered QC 9V waveform is shown below:

The three lines are VBUS, DP and DM.

On the right side, you can clearly see the voltage step from 5V to 9V, which is the characteristic of QC2.0 protocol.

Details:

In this detailed picture, you can clearly see the edge signals of DP and DM start and trigger.

Information read using the defecation device:

QC 9V Trigger Test - Adaptable Charger

Charger support types:

Trigger type:

Captured waveform:

DP and DM triggered at a weird 1.8V and 3.3V before triggering at 9V.

I read the introduction of the development board and chip, and it seems that PD cannot be triggered without modifying the board.

These two waveforms are somewhat similar to the waveforms found on the Internet, but not quite the same.

E-Mark Test

Pretend to be an E-Mark cable: connect a 1K to R1.

I originally planned to use 221K to make a few voltage testing boards, and bought a C-port header, but after looking at the pins, I realized that I would not be able to do it in a short time.

EricCheng

Study

dcexpert

The configuration resistor of CH221 cannot be connected to GND, which is sometimes inconvenient.

韵湖葱白

dcexpert posted on 2022-9-4 14:40 The configuration resistor of CH221 cannot be grounded to GND, which is sometimes inconvenient.

It's true, CFG to VDD.

soso

Yunhu Congbai published on 2022-9-5 09:14 It is true, CFG versus VDD.

I'll share it when I have time later:) Your writing style is quite good.