TC35679FSG-002

2018-01-17

14

4.1.2.

Support Protocol Layer

Following figure shows the Bluetooth Protocol and Profile Layer supported.

It has RF control, Link layer, internal HCI, L2CAP, ATT, SMP and GATT.

Figure 4-1 Protocol Layer

4.1.3.

RF

Since the RF analog part of TC35679 builds in not only transmission and reception circuits but also the RF switch and the matching

circuit, the RFIO pin which is a single I/O does not need an external matching circuit. The wireless device which suits for RF-PHY

specifications of Bluetooth low energy can be realized easily by connecting to 50 Ω wiring.

The transmission power can be selected from intended power between 0 and -20 dBm (4 dB steps). Not only default transmission

power but also transmission power to the specified destination can be set. The RSSI of reception block has an accuracy of ± 2 dB

(typ.) to the input signal between -90 and -10 dBm.

4.1.4.

Auto Advertise Function

Using an auto advertise function enables repeating transmissions of advertise packets with very small power. The auto advertise

function is a function which transmits intended advertise packets without waking CPU up in Backup mode. Then, a scan request

and a connection request can be also received. The response to the remote device can be preset in case of receiving a scan

request, and when one connection request is received, this function wakes CPU up and leaves a subsequent process to the user

software.

CommandAPI

Option: User-Application (User-App)

Service Database

GATT

ATT

SMP

Connection

Update

GAP

UART Driver

L2CAP

Internal HCI

Link layer

RF control