BM70 BLE Connection States
The Bluetooth Low Energy (BLE) Link Layer on the BM70 operates in a variety of states that are analogous to those described in the standard. This page provides an overview of these connection states. It will help you better understand the device datasheet electrical specifications.
BLE Connection Phases
In a BLE connection establishment, both hosts run through a sequence of basic connection phases, as shown in the diagram:
| Connection Phase | Overview |
|---|---|
| Standby/Idle | No connection |
| Discovery | Slave (Advertiser) sends ADV packets and is discoverable |
| Connecting | Master (Initiator) selects a device to connect to |
| Connected | Master/Slave exchange data packets at regular intervals |
BLE Link Layer States
These connection phases correspond to Link Layer states as defined in the Bluetooth standard:
BM70 Link Layer States
BM70 defines its own Link Layer operating states that are analogous to those defined above:
| BM70 LL State | Corresponds To | Connection Phase |
|---|---|---|
| Shutdown | - | Lowest Power mode (BM70 is shutdown) |
| Idle | Standby | No connection |
| Standby | Advertising | Discovery |
| Scanning | Scanning | Discovery |
| Connecting | Initiating | Connecting |
| Connected | Connected | Connected |
BM70 defines different labels for some of the basic BLE Link Layer states. This page outlines these differences and will help you better understand the electrical specifications in the device datasheet.