Part Number: CC2640
Tool/software: TI-RTOS
We're using CC2640 to connect with Apple Watch, We finished the BLE connection and the SC OOB pairing and then the Apple Watch will initiate a L2CAP connection with CC2640 and do the MFi certification communication on it.
The pictures below are the log of the Apple Watch:
When the Apple Watch sent LE Credit Based connection Request to CC2640, CC2640 reject this connection, as below:
But we use Nordic chip to test this connection, it is normal, as below:

