MC33594 查看數據表（PDF） - Motorola => Freescale

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MC33594

PLL Tuned UHF Receiver for Data Transfer Applications

Motorola => Freescale 

Freescale SMeCm33ic59o4nductor, Inc.

If the Strobe oscillator is enabled (SOE=1), the circuit is in Sleep mode during SR × TStrobe and in Run mode

during TStrobe (where TStrobe is the Strobe oscillator period and SR is the Strobe Ratio, see Table 5). Therefore,

the sleep/run cycle period is equal to (SR+1) × TStrobe.

If SOE=0, these timings constraints must be respected by the external control applied on pin STROBE.

Figure 6: Complete telegram with ID detection

P+ID P+ID P+ID P+ID P+ID P+ID

P+Header Data EOM

RF signal

Run

Sleep

Run

Sleep

TStrobe

SR × TStrobe

ID detected

P+ID = Preamble ID

P+Header = Preamble Header

Figure 7: Complete telegram with tone detection

Tone

Header Data EOM

RF signal

Run

Sleep

Run

Sleep

TStrobe

SR × TStrobe

ID detected

Figures 8 & 9 detail RF signals and the processing done by the receiver in several configuations.

Figure 8: Telegrams with ID

DME=1, HE=1

Preamble ID

Preamble ID

Preamble ID

Preamble Header Data EOM

ID detected

RF signal

Data

DME=1, HE=0

SPI output

Preamble ID ID ID ID ID ID ID ID ID ID ID ID ID ID Data EOM

ID detected

RF signal

ID ID ID ID ID ID ID ID Data

SPI output

© Motorola, Inc., 2002.

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Go to: www6.freescale.com

revision 1.1, 5 February 2002

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