T5743 데이터 시트보기 (PDF) - Atmel Corporation

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T5743

UHF ASK/FSK Receiver

Atmel Corporation 

Figure 16. Synchronization of the Demodulator Output

T XClk

Clock bit-check

counter

Dem_out

Data_out (DATA)

tee

Figure 17. Debouncing of the Demodulator Output

Dem_out

Data_out (DATA)

tDATA_min

tee

tDATA_min

tee

tDATA_min

tee

Figure 18. Steady L State Limited DATA Output Pattern After Transmission

IC_ACTIVE

Bit check

Dem_out

Data_out (DATA)

Start-up mode

Bit-check mode

Receiving mode

tDATA_min

tDATA_L_max

After the end of a data transmission, the receiver remains active. Depending on the bit

Noise_Disable in the OPMODE register, the output signal at Pin DATA is high or ran-

dom noise pulses appear at Pin DATA (see section “Digital Noise Supression”). The

edge-to-edge time period tee of the majority of these noise pulses is equal or slightly

higher than TDATA_min.

16 T5743

4569A–RKE–12/02

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