Other Parts Discussed in Thread: TUSB217-Q1, , TUSB217, TUSB215
Hi,
We used to use tusb217-q1, but for some reasons, we now replace it with tusb215-q1. However, the following problems occur when using tusb215-q1. Please analyze what causes the abnormality. Thanks!
Pre-channel cable length=1/2/3/4 metres which is connected to the automobile host.
1.Products using tusb215-q1,when Post-channel cable length="C to A" adapter cable(15cm)+1m "non-original" phone cable,Carlife recognition failed, Carplay recognition succeeded.
2.Products using tusb215-q1,when Post-channel cable length="C to A" adapter cable(15cm)+1m "original" phone cable,Carlife and Carplay recognition succeeded.
3.Products using tusb215-q1,when Post-channel cable length=1m "C to C" phone cable,Carlife and Carplay recognition succeeded.
4.However, products using tusb217-q1 performs well with all types of cable.
Why are the 1~3 situations different?
Why do tusb217-q1 and tusb215-q1 behave differently?
This matter is very urgent. Please help us deal with it as soon as possible. Thank you for your support!
Design schematic diagram for products using tusb217-q1
D1M/D1P is connected to the automobile host, D2M/D2P is connected to the phone,VBI is VBUS from the automobile host (5V),
Design schematic diagram for products using tusb215-q1
D1M/D1P is connected to the automobile host, D2M/D2P is connected to the phone,VBI is VBUS from the automobile host (5V),
Eye diagram test report for products using tusb215-q1 with 4m pre-channel cable.