ata5724p3c-tkqy ATMEL Corporation, ata5724p3c-tkqy Datasheet - Page 31

• Manufacturer Part Number: ata5724p3c-tkqy
• Description: Uhf Ask/fsk Receiver
• Manufacturer: ATMEL Corporation

Atmel ATA5723C/ATA5724C/ATA5728C
Bit 15 is followed by the equivalent time window t9. During this window, the equivalence
acknowledge pulse t8 (E_Ack) occurs if the just programmed mode word is equivalent to the
mode word that was already stored in that register. E_Ack should be used to verify that the
mode word was correctly transferred to the register. The register must be programmed twice
in that case.
A register can be programmed when the receiver is in both sleep-mode and active mode. Dur-
ing programming, the LNA, LO, low-pass filter, IF-amplifier, and the FSK/MSK demodulator
are disabled. The t1 pulse is used to start the programming or to switch the receiver back to
polling mode (OFF command). (The receiver is switched back to polling mode with the OFF
command if bit 1 is set to „1“.) The following convention should be considered for the length of
the programming start pulse t1:
Using a t1 value of t1 (min) < t1 < 5632 TClk (where t1 (min) is the minimum specified value
for the relevant BR_Range) when the receiver is active i.e., not in reset mode initiates the pro-
gramming or OFF command. However, if this t1 value is used when the receiver is in reset
mode, programming or OFF command is NOT initiated and RM remains present at pin DATA.
Note, the RM cannot be deleted when using this t1 value.
Using a t1 value of t1 > 7936 ´ TClk, programming or OFF command is initiated when the
receiver is in both reset mode and active mode. The registers PMODE and LIMIT are set to
the default values and the RM is deleted, if present. This t1 values can be used if the con-
nected microcontroller detects an RM. Additionally, this t1 value can generally be used if the
receiver operates in default mode.
Note that the capacitive load at pin DATA is limited.
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