SX1230 Просмотр технического описания (PDF) - Semtech Corporation

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SX1230

Integrated Transmitter IC Narrow/wideband 315 MHz, 434 MHz 868 MHz and 915 MHz band Transmitter

Semtech Corporation 

ADVANCED COMMUNICATIONS & SENSING

SX1230

Integrated Transmitter IC

DATASHEET

Symbol Description

TS_TR Transmitter wake-up time

TS_OS

FXOSC

TS_TT

Crystal oscillator wake-up time

Crystal oscillator frequency

Total Wake up time

T_DATA Data set-up time

Conditions

Frequency synthesizer enabled.

Note, depends upon bit rate and

ramp time, please refer to Section

7.4.

Sleep to transmit, automated. Note,

depends upon bit rate and ramp

time, please refer to Section 7.4.

Min Typ Max Unit

-

120

- µs

-

300 500 µs

26

32

32 MHz

-

450

- µs

-

-

0.25 µs

3. Timing Characteristics

The following table gives the operating specifications for the SPI interface of the SX1230.

Table 5 SPI Timing Specifications

Symbol Description

fSCK

tch

tcl

trise

tfall

tsetup

SCK Frequency

SCK High time

SCK Low time

SCK rise time

SCK Fall time

MOSI Setup time

thold

MOSI hold time

tnl

NSS setup time

tnh,n

NSS Hold time

Conditions

Min Typ Max Unit

-

-

10 MHz

50

-

- ns

50

-

- ns

-

5

- ns

-

5

- ns

From MOSI transition to SCK rising

30

-

edge

- ns

From SCK rising edge to MOSI tran- 20

-

sition

- ns

From NSS falling edge to SCK rising 30

edge

- ns

From SCK falling edge to NSS rising 30

-

edge.

- ns

For explanatory diagrams of the timing characteristic parameters, please see Figure 7 and Figure 8.

SX1230, Revision 2 May 2009

©2008 Semtech Corp.

Page 9

www.semtech.com

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