PM0237 Datasheet, PDF (12/88 Pages) STMicroelectronics – The main purpose of this document is to provide a developer

Bluetooth low energy technology
PM0237
1.3.1
BLE packets
A packet is a labeled data that is transmitted by one device and received by one or more
other devices.
The BLE data packet structure is described below.
Figure 4. Packet structure
*$06(&
• Preamble: RF synchronization sequence
• Access address: 32 bits, advertising or data access addresses (it is used to identify the
communication packets on physical layer channel)
• Header: its content depends on the packet type (advertising or data packet)
a) Advertiser packet header:
Table 2. Advertising data header file content
Advertising packet type
Reserved
Tx address type
(4 bits)
(2 bits)
(1 bit)
Rx address type
(1 bit)
12/88
DocID027104 Rev 2