Si4734/35-B20

(OFALL = 1)

INVERTED

 

 

 

 

 

 

 

 

 

 

 

 

DCLK

 

 

 

 

 

 

 

 

 

 

 

(OFALL = 0)

DCLK

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

LEFT CHANNEL

 

 

I2S

DFS

 

 

 

 

 

 

(OMODE = 0000)

 

 

 

 

 

1 DCLK

 

 

 

 

n-2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

DOUT

1

2

3

 

 

n-1

n

 

 

 

 

 

 

 

 

 

MSB

 

 

 

 

 

 

LSB

 

 

 

 

 

 

 

 

 

 

 

RIGHT CHANNEL

1 DCLK

1

2

3

n-2

n-1

n

MSB

 

 

 

 

LSB

(OFALL = 1)

INVERTED

DCLK

 

(OFALL = 0)

DCLK

 

DFS

Left-Justified

 

(OMODE = 0110)

 

 

DOUT

Figure 10. I2S Digital Audio Format

 

 

 

LEFT CHANNEL

 

 

 

 

 

RIGHT CHANNEL

 

 

1

2

3

n-2

n-1

n

1

2

3

n-2

n-1

n

MSB

 

 

 

 

LSB

MSB

 

 

 

 

LSB

Figure 11. Left-Justified Digital Audio Format

(OFALL = 0)

DCLK

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

DFS

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

DOUT

 

 

 

 

 

 

 

 

LEFT CHANNEL

 

 

 

 

 

 

 

 

 

 

RIGHT

 

CHANNEL

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(OMODE = 1100)

1

 

2

3

 

 

n-2

 

n-1

n

1

2

3

 

 

n-2

n-1

n

 

 

 

 

 

 

 

 

 

 

(MSB at 1st rising edge)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1 DCLK

MSB

 

 

 

 

 

 

 

 

 

 

LSB

 

MSB

 

 

 

 

 

 

 

 

 

LSB

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

DOUT

 

 

 

 

 

 

 

LEFT CHANNEL

 

 

 

 

 

 

 

 

 

RIGHT CHANNEL

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

2

3

 

 

 

 

n-2

n-1

 

n

1

2

3

 

 

 

n-2

n-1

n

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(OMODE = 1000)

(MSB at 2nd rising edge)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MSB

 

 

 

 

 

 

 

 

 

 

LSB

 

MSB

 

 

 

 

 

 

 

 

LSB

Figure 12. DSP Digital Audio Format

22

Rev. 1.0

Page 21 Page 23
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Image 22
Silicon Laboratories SI4734/35-B20 manual I2S Digital Audio Format
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SI4734/35-B20 specifications

Silicon Laboratories SI4734/35-B20 is an advanced, highly integrated broadcast radio receiver designed for various consumer applications. Hailed for its compactness and versatility, the SI4734/35-B20 offers extensive features that enable radio reception across multiple frequency bands, including AM, FM, and shortwave. It caters to the needs of manufacturers looking to incorporate reliable radio capabilities into their devices, ensuring quality sound and performance without the cumbersome designs typically associated with traditional radio receivers.

At the heart of the SI4734/35-B20 are performance-optimized technologies. One standout feature is the device's ability to support digital and analog processing simultaneously, utilizing Silicon Labs’ proprietary digital signal processing (DSP) technology. This architecture not only enhances signal clarity but also helps in mitigating noise, enabling users to experience a superior audio quality across varied environments.

Another notable characteristic of the SI4734/35-B20 is its low power consumption, making it ideal for battery-operated devices. The receiver employs sophisticated power management techniques that allow it to operate efficiently, prolonging battery life while maintaining optimal performance. In this context, the “sleep” mode and fast wake-up times contribute to significant energy savings, affirming its suitability for portable applications.

The SI4734/35-B20 is designed with a robust set of features for ease of integration into various systems. The device supports multiple programmable interfaces, including I2C, providing flexibility in communication with microcontrollers and facilitating straightforward integration into existing designs. Because of its programmable architecture, developers can customize the receiver’s capabilities according to the specific needs of their applications.

Additional features include automatic frequency control (AFC) for stability in tuning, allowing seamless transitions while listening to programs. The built-in AGC (automatic gain control) optimizes the receiver's sensitivity to ensure clear reception even in weak signal conditions.

The SI4734/35-B20 also possesses a wide frequency range, accommodating both standard and niche applications. Its compact form factor and surface-mount technology (SMT) footprint further enhance its appeal to developers seeking to maximize board space in their designs.

In conclusion, the Silicon Laboratories SI4734/35-B20 is a significant advancement in radio receiver technology, combining advanced DSP, low power consumption, and ease of integration. These attributes make it a preferred choice for engineers and manufacturers looking to deliver high-quality audio experiences across a range of consumer electronics, from radios to multifunctional smart devices.
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