MC33596(2007) 查看數據表（PDF） - Freescale Semiconductor

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MC33596
(Rev.:2007)

PLL Tuned UHF Receiver for Data Transfer Applications

Freescale Semiconductor 

Communication Protocol

NOTE

It is possible to build a tone to form the detection sequence by programming

the ID register with a full sequence of ones or zeroes. In this case, the header

(or its complement) must not be found in this tone (i.e., it must not be a full

sequence of ones or zeroes).

11.3 Message Protocol

When the strobe oscillator is enabled (SOE = 1), the receiver is continuously on/off cycling. The ID must

be recognized for the receiver to stay on. Consequently, the transmitted ID burst must be long enough to

include two consecutive receiver On cycles.

When the strobe oscillator is not enabled (SOE = 0), these timing constraints must be respected by the

external control applied to pin STROBE.

P+ID = Preamble ID

P+Header = Preamble Header

RF

Signal

P+ID

P+ID

P+ID

P+ID

P+ID

P+ID

P+Header

Data EOM

Receiver

Status

On

Off

On

Off

SPI

Output

On Time

Off Time

ID

Detected

Data

Figure 10. Complete Telegram with ID Detection

RF

Signal

Receiver

Status

SPI

Output

On

On Time

Tone

Header

Data EOM

Off

Off Time

ID

Detected

On

Off

Data

Figure 11. Complete Telegram with Tone Detection

MC33596 Data Sheet, Rev. 3

20

Freescale Semiconductor

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