TC35680FSG-002/TC35681FSG-002

2

2019-04-04

Table of Contents

Preface...............................................................................................................................................................................................................5

Related Documents.....................................................................................................................................................................................5

Technical Terms and Abbreviations .........................................................................................................................................................5

1.

Function Outlines and Features ...........................................................................................................................................................6

1.1.

Function Outlines ..........................................................................................................................................................................6

1.2.

Features.........................................................................................................................................................................................7

2.

Pin Assignment................................................................................................................................................................................... 10

2.1.

Pin Assignment of TC35680FSG (Top View)........................................................................................................................... 10

2.2.

Pin Assignment of TC35681FSG (Top View)............................................................................................................................11

2.3.

Function of Each Pin.................................................................................................................................................................. 12

2.4.

List of Functions of GPIO Pins .................................................................................................................................................. 14

Example of GPIO Function Setting................................................................................................................................... 15

Limitation on Assignment of UART Function to GPIO..................................................................................................... 16

Limitation on Assignment of I2C Function to GPIO .......................................................................................................... 16

2.5.

Power Supply Pins..................................................................................................................................................................... 17

3.

Device Overview ................................................................................................................................................................................ 19

3.1.

Internal Block Diagram............................................................................................................................................................... 19

Power Supply System....................................................................................................................................................... 20

Clock System..................................................................................................................................................................... 20

Hardware Start-up Sequence ........................................................................................................................................... 21

3.2.

System Configuration and Operating Mode............................................................................................................................. 22

3.3.

System Configuration ................................................................................................................................................................ 23

Standalone System ........................................................................................................................................................... 23

Host-Controlled System .................................................................................................................................................... 23

3.4.

Selection and Setting of Operating Mode................................................................................................................................. 24

HCI Mode........................................................................................................................................................................... 25

Complete Mode ................................................................................................................................................................. 25

User-App Mode ................................................................................................................................................................. 25

3.5.

Start-up Sequence..................................................................................................................................................................... 26

Details of Start-up Sequence ............................................................................................................................................ 26

3.6.

Low Power System.................................................................................................................................................................... 28

State Transition .................................................................................................................................................................. 28

Available Functions in Each Low Power Mode................................................................................................................ 29

Condition on Transition to Low Power Mode ................................................................................................................... 31

Condition on Return from Low Power Mode.................................................................................................................... 32

Acquisition of Wake-up Factor and Return from Low Power Mode................................................................................ 32

4.

Functions ............................................................................................................................................................................................ 33

4.1.

Bluetooth® Wireless Communication........................................................................................................................................ 33

Supported Functions ......................................................................................................................................................... 33

RF Function........................................................................................................................................................................ 34

4.2.

Output Power Setting................................................................................................................................................................. 34

4.3.

Auto-advertise Function............................................................................................................................................................. 34

4.4.

Power Supply............................................................................................................................................................................. 35

VBAT and VDDIO.............................................................................................................................................................. 35

Voltage Step-Down DC/DC Converter and LDO Regulator ........................................................................................... 35

4.5.

Reset Interface........................................................................................................................................................................... 36

Feature ............................................................................................................................................................................... 36

Connection Example ......................................................................................................................................................... 36

4.6.

General-purpose I/O (GPIO) Function...................................................................................................................................... 37