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UPD77533 датащи(PDF) 28 Page - Renesas Technology Corp

номер детали UPD77533
подробное описание детали  MOS INTEGRATED CIRCUIT
PDF  104 Pages
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производитель  RENESAS [Renesas Technology Corp]
домашняя страница  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

UPD77533 датащи(HTML) 28 Page - Renesas Technology Corp

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Data Sheet S15671EJ4V0DS
26
µµµµPD77533
5.1.3 TXACTV control
Command: TXACTV Control (CMD-ID: 0x07)
For details of TXACTV control, see 6.4 TXACTV Control.
The initial value is “No TXACTV control”.
To avoid degradation of the GPS reception signal due to PDC/PHS RF output noise or noise from another such
source, input a signal to the TXACTV input pin indicating that PDC/PHS signals are being transmitted and change
this setting to “TXACTV control used” using the TXACTV Control command (CMD-ID: 0x07). By doing this, the A/D
converter output value when the TXACTV input signal = 1 (PDC/PHS transmission in progress) is masked by 0x0 in
the
µPD77533.
5.1.4 Doppler search range
Command: “Doppler Search Range” (CMD-ID: 0x57)
The Doppler search range setting value differs depending on the frequency and accuracy of the reference clock
and the local clock used. For details of how to calculate the Doppler search range (calculation formula), see 6.1.3
Doppler Search Range.
5.1.5 Flow point output
Command: Flow Point Control (CMD-ID: 0x7F)
The initial value of the flow point output is “Flow point output not controlled”.
The output of the Processing End flow point must be set to ON in order for the
µPD77533 to notify the host CPU
that all positioning is complete.
For flow point details, see 17.1 Flow Point Control.



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