Table of Contents

1. Overview

1

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1.1. Features

1

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1.2. Applications

1

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2. Pin Definition

3

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3. Functional Description

5

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3.1. Block Diagram

5

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3.2. Ultra Low Power Technology

5

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3.3. Highest Level of Integration

5

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3.4. Clock

6

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3.4.1. High Frequency Clock

6

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3.4.2. External Reference Requirements

6

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3.5. Radio

7

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3.5.1. Channel Frequencies

7

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3.5.2. 2.4 GHz Receiver

7

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3.5.3. 2.4 GHz Transmitter

7

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3.5.4. Clock Generator

8

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3.6. Bluetooth Co-Existence

8

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3.7. Power Management

8

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4. Peripheral Interface

10

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4.1. SDIO Host Interface

10

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4.2. General Purpose Input Output (GPIO)

11

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4.3. Real Time Clock IO (EXT_LFC)

11

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4.4. Digital IO Pads

11

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5. Electrical Characteristics

12

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5.1. Absolute Maximum Ratings

12

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5.2. Power Consumption

12

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5.3. RF Specifications

13

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6. QFN32 Package Information

15

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7. Schematics

16

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