SI4720-B20-GMR Просмотр технического описания (PDF) - Silicon Laboratories

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SI4720-B20-GMR

BROADCAST FM RADIO TRANSCEIVER FOR PORTABLE APPLICATIONS

Silicon Laboratories 

Si4720/21-B20

Table 6. 3-Wire 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, SEN to SCLKSetup

tS

20

—

—

ns

SDIO Input to SCLKHold

SEN Input to SCLKHold

tHSDIO

tHSEN

10

—

—

ns

10

—

—

ns

SCLKto SDIO Output Valid

tCDV

Read

2

—

25

ns

SCLKto SDIO Output High Z

tCDZ

Read

2

—

25

ns

SCLK, SEN, SDIO, Rise/Fall time

tR, tF

—

—

10

ns

Note: When selecting 3-wire mode, the user must ensure that a rising edge of SCLK does not occur within 300 ns before the

rising edge of RST.

SCLK 70%

30%

SEN 70%

30%

tR

tF

tS

tHSDIO

tHIGH tLOW

tS

tHSEN

SDIO 70%

30%

A6-A5,

A7

R/W,

A0

A4-A1

D15

D14-D1

D0

Address In

Data In

Figure 4. 3-Wire Control Interface Write Timing Parameters

SCLK 70%

30%

tS

SEN 70%

30%

tHSDIO

tS

tCDV

tHSEN

tCDZ

70%

SDIO

30%

A6-A5,

A7

R/W,

A0

A4-A1

D15

D14-D1

D0

Address In

½ Cycle Bus

Turnaround

Data Out

Figure 5. 3-Wire Control Interface Read Timing Parameters

10

Rev. 1.0

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