Silicon Laboratories SI4734/35-B20 manual SPI Control Interface Write Timing Parameters

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Si4734/35-B20

Table 7. SPI Control Interface Characteristics (VDD = 2.7 to 5.5 V, VIO = 1.5 to 3.6 V, TA = –20 to 85 °C)

 

Parameter

Symbol

Test Condition

Min

Typ

Max

Unit

 

 

 

 

 

 

 

 

 

SCLK Frequency

fCLK

 

0

—

2.5

MHz

 

SCLK High Time

tHIGH

 

25

—

—

ns

 

SCLK Low Time

tLOW

 

25

—

—

ns

 

SDIO Input,

 

to SCLK↑ Setup

tS

 

15

—

—

ns

 

SEN

 

 

SDIO Input to SCLK↑ Hold

tHSDIO

 

10

—

—

ns

 

 

Input to SCLK↓ Hold

tHSEN

 

5

—

—

ns

 

SEN

 

 

SCLK↓ to SDIO Output Valid

tCDV

Read

2

—

25

ns

 

SCLK↓ to SDIO Output High Z

tCDZ

Read

2

—

25

ns

 

SCLK,

 

SDIO, Rise/Fall time

tR, tF

 

—

—

10

ns

 

SEN,

 

Note: When selecting SPI mode, the user must ensure that a rising edge of SCLK does not occur within 300 ns before the rising edge of RST.

SCLK

SEN

SDIO

70%

30%

70%

30%

70%

30%

tS

tS

 

C7

C6–C1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

tHIGH

 

 

 

 

 

tLOW

 

 

 

tHSDIO

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

C0D7

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

tR

 

 

 

 

 

tF

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

D6–D1

tHSEN

D0

Control Byte In

8 Data Bytes In

Figure 6. SPI Control Interface Write Timing Parameters

SCLK

SEN

SDIO

70%

30%

70%

30%

70%

30%

tS

tS

C7

C6–C1

tCDV

tHSDIO

C0

tHSEN

tCDZ

D7 D6–D1D0

Control Byte In

Bus

16 Data Bytes Out

 

Turnaround

(SDIO or GPO1)

Figure 7. SPI Control Interface Read Timing Parameters

10

Rev. 1.0

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Contents Applications FeaturesFunctional Block Diagram DescriptionSi4734/35-B20 Table of Contents Parameter Symbol Value Unit Electrical SpecificationsParameter Symbol Test Condition Min Typ Max Unit Recommended Operating ConditionsAM/SW/LW Mode DC CharacteristicsParameter Symbol Test Condition Min Typ Max Unit FM Mode Supplies and InterfaceRST Parameter Symbol Min Typ Max UnitGPO1, GPO2/INT Wire Control Interface Characteristics1,2,3 StartSclk Sdio SEN SclkSPI Control Interface Write Timing Parameters Dclk DFS Dout RDS Bler 5% FM Receiver Characteristics1,2Fmdeemphasis = Si4734/35-B20 KHz Long Wave LW 153 279 Refclk RefclkprescaleCrystal Oscillator Typical Application Schematic Si4734/35-GMComponents Value/Description Supplier Bill of MaterialsOptional Components 5.5 Functional DescriptionOverview 3.6VAM Receiver Operating ModesFM Receiver SW ReceiverAudio Data Formats Digital Audio Interface Si4735 OnlyAudio Sample Rates I2S Digital Audio Format Soft Mute Stereo Audio Processing De-emphasisStereo DAC RDS/RBDS Processor Si4735 OnlySeek TuningBus Mode Select on Rising Edge Reference ClockSPI Control Interface Mode Programming with Commands Firmware UpgradesReset, Power Up, and Power Down GPO OutputsCmd Commands and PropertiesSi473x Command Summary DescriptionProp Name Description Default Si473x Property SummaryAmdeemphasis RdsconfigRxvolume AmchannelfilterPin Descriptions Si4734/35-GM Pin Numbers Name DescriptionQFN Ordering GuidePart Number Description Package Operating RDS/RBDSSi4734/35 Top Mark Package Markings Top MarksTop Mark Explanation Symbol Millimeters Min Nom Max Package Outline Si4734/35 QFNPCB Land Pattern Si4734/35 QFN PCB Land PatternSymbol Millimeters Min Max PCB Land Pattern DimensionsBSC Additional Reference Resources Document Change List Revision 0.4 to RevisionContact Information

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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