PD17012GF-058_15 Datasheet, PDF (76/94 Pages) Renesas Technology Corp – PLL FREQUENCY SYNTHESIZER AND CONTROLLER FOR FM/MW/LW TUNER (AUTOMOBILE APPLICATION)

(b) Continuous up/down
(i) When AUTO500 switch = 0
<1> <2> <3>
<3> <5> <3> <5>
15 ms 40 ms
0.5 sec
40 ms
40 ms
µPD17012GF-058
<4>
Key on
Key off
At the band edges, the time of <5> is 500 ms, and the time of <4> is 600 ms to 700 ms.
(ii) When AUTO500 switch = 1
The auto-tuning function is enabled by holding down the key for 0.5 second or more, so that continuous
up/down operation is not performed.
(2) Automatic up/down
(a) SEEK UP , SCAN UP , or SCAN DWN key
<1> <2> <3> <6> <5> <3> <6> <5>
<3> <6> <5>
<4>
15 ms 40 ms
40 ms
40 ms
40 ms 300 - 400 ms
Key on
SD, IF check
Station not involved
SD, IF check
Station not involved
SD, IF check
Station involved
(b) When the MAN UP key is held down for 0.5 second or more when AUTO500 switch = 1
<1>
<2> <3> <6> <5> <3> <6> <5>
<6> <5>
<4>
15 ms 0.5 sec 40 ms
40 ms
40 ms 300 - 400 ms
Key on
SD, IF check
Station not involved
SD, IF check
Station not involved
SD, IF check
Station involved
In either case (a) or case (b), the time of <5> is 540 ms at the band edges.
An IF check is made twice in the FAST mode and SLOW mode.
74