PD178016GC-051_15 Datasheet, PDF(47/96 Page) Renesas Technology Corp – 8-BIT SINGLE-CHIP MICROCONTROLLER WITH BUILT-IN PRESCALER, PLL FREQUENCY SYNTHESIZER, AND IF COUNTER FOR AUTOMOTIVE FM/MW/LW RADIO APPLICATIONS

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PD178016GC-051_15 Datasheet, PDF (47/96 Pages) Renesas Technology Corp – 8-BIT SINGLE-CHIP MICROCONTROLLER WITH BUILT-IN PRESCALER, PLL FREQUENCY SYNTHESIZER, AND IF COUNTER FOR AUTOMOTIVE FM/MW/LW RADIO APPLICATIONS

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ÂµPD178016GC-051

The frequencies in the AF list are received at the following timings.

MUTE

LPFSEL

AGCC

<1>

<3> <4> <5> <6> <7> <8>

<9>

<2>

<10>

<1> Preceding mute time (3 ms)

<2> PLL set time

<3> Lock wait time (40 ms MAX.)

<4> SD stabilization wait time (1 ms)

<5> Signal meter reading measurement time

<6> IF stabilization wait time (5 ms)

<7> IF measurement time (4 ms, 40 ms MAX.)

<8> Following mute time (3 ms) (Mute is cleared if initial setting diode NO_PIM is jumpered.)

<9> PI decode once wait time (400 ms MAX.)

<10> PI decode two times wait time (800 ms MAX.)

(4) Judgment of PI code

(a) Judgment of PI code when REGION mode is off

When 16 bits coincide, the station is judged as being the same.

(b) Judgment of PI code when REGION mode is on

When 12 bits of the PI code, except the area cover code, coincide, the station is judged as being the same.

If, however, the area cover code is 0 to 2, the station is judged as being the same when 16 bits coincide.

For the UK market, however, 8 bits are used for judgment (the area cover code and the last 4 bits are not

used).

The following processing is performed so that a station in a different REGION is not easily selected during

AF operation.

<1> The signal meter reading at which the existence of a station is judged is changed between a station

whose REGION coincides (or is unknown) and a station whose REGION is different, where the signal

meter reading of the AF operation is judged.

<2> The value at which the signal meter for a station in a different REGION is judged is set to 5 V (0FFH)

when the tunable frequency is changed.

<3> Each time the AF operation fails, the value at which the signal meter for a station in a different REGION

is judged is decreased by 0.3125 V (10H). The minimum value is the voltage input to the SMT_B/C

pin, or +0.3125 V.

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