Hello,
I am evaluating CYBT-333047-02 mounted on my board.
But there is a problem. (The number of occurrences is 5/10 systems.)
<Environment>
- EZ-Serial Firmware v1.1.14
- SPP
* It is set to ".CYSPPSP, E=0" (CYSPP on the BLE side is disabled.)
- The configuration being evaluated
[Laptop A] <=(USB)=> [USB - Serial Cable] <=(PUART)=> [Board with CYBT-333047-02] <=(BR/EDR)=> [Laptop B]
* Both Laptops use Teraterm to check serial data.
<Steps to cause problems>
1. Connect [Laptop A] and [board] with a [USB - Serial cable], and turn on the power of [board].
2. Launch Teraterm of [Laptop A] and connect COM port.
* BOOT event message (of EZ-Serial F/W) is displayed in Teraterm of [Laptop A].
3. Search for CYBT-333047-02 in [Laptop B] and perform pairing (Justworks).
* P/PR/ENC/PKD event message (of EZ-Serial F/W) is displayed in Teraterm of [Laptop A]
4. Launch Teraterm of [Laptop B] and connect COM port.
* BTCON event message (of EZ-Serial F/W) is displayed in Teraterm of [Laptop A].
5. Data can be sent from [Laptop A] to [Laptop B]
Data can be sent from [Laptop B] to [Laptop A]
6. Dis-connect COM port in Teraterm of [Laptop B].
* BTDIS event message (of EZ-Serial F/W) is displayed in Teraterm of [Laptop A].
7. re-connect COM port in Teraterm of [Laptop B].
* BTCON event message (of EZ-Serial F/W) is displayed in Teraterm of [Laptop A].
8. Data can't be sent from [Laptop A] to [Laptop B]
Data can be sent from [Laptop B] to [Laptop A]
The problem is step 8, and when I reconnect to 7, I can't send data from [Laptop A] to [Laptop B].
This doesn't happen on all boards, so I think there may be a Hardware factor.
(XRES is released 50ms after VDDIN stabilizes.)
However, it can also be a problem with the EZ-Serial F/W.
Is this kind of phenomenon happening?
I also want to improve this problem as soon as possible.
Best regards,
TK
