ATA8205 ATMEL Corporation, ATA8205 Datasheet - Page 31

• Manufacturer Part Number: ATA8205
• Description: (ATA8203 - ATA8205) Industrial UHF ASK/FSK Receiver
• Manufacturer: ATMEL Corporation

ATA8203/ATA8204/ATA8205
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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. During
programming, the LNA, LO, low-pass filter, IF-amplifier, and the FSK/MSK demodulator are dis-
abled. 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 program-
ming 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 program-
ming 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 connected
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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