AS3930 Просмотр технического описания (PDF) - austriamicrosystems AG

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AS3930

Single Channel Low Frequency Wakeup Receiver

austriamicrosystems AG 

AS3930

Datasheet - Detailed Description

Figure 15. Send Direct COMMAND Byte

CS

SCLK

SDI

X1

1

C5 C4 C3 C2 C1 C0

Two leading

ONE indicate

COMMAND

Mode

SCLK rising

edge Data is

transfered from

µC

SCLK

falling edge

Data is

sampled

X

CS falling edge

signals the end of

COMMAND Mode

8.2.3 SDI Timing

Table 13. SDI Timing Parameters

Symbol

Parameter

TCSCLK

Time CS to Sampling Data

TDCLK

Time Data to Sampling Data

THCL

SCLK High Time

TCLK

SCLK period

TCLKCS

Time Sampling Data to CS down

TCST

CS Toggling time

Figure 16. SDI Timing Diagram

CS

SPI

TCSCLK

Min

Typ

Max

Units

500

ns

300

ns

200

ns

1

µs

500

ns

500

ns

TCST

t

SCLK

TDCLK

THCL

TCLK

t

TCLKCS

t

www.ams.com/LF-Receiver/AS3930

Revision 1.5

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