Realtek PDF datasheets for RTL8761

The Realtek RTL8761ATT is a highly integrated single-chip Bluetooth 2.1/3.0/4.0/4.1/4.2 controller with a UART interface. It combines a BT Protocol Stack (LM, LL, L2CAP, GATT, RFCOMM, SPP, and LE), BT Baseband, modem, and BT RF in a single chip.

The RTL8761ATT Bluetooth controller complies with Bluetooth core specification v4.0/v4.1/v4.2, and supports dual mode (BR/EDR + AMP + Low Energy Controllers). It is compatible with previous versions, including v2.1 + EDR and v3.0 + HS. For BR/EDR, it allows one active link in either slave mode or master mode. For Low Energy, it supports multiple states and allows one active links in slave mode. A BR/EDR link and an LE link can be active at the same time.