PD17012GF-055_15 Datasheet, PDF (46/84 Pages) Renesas Technology Corp – SINGLE-CHIP MICROCONTROLLER WITH ON-CHIP PRESCALER, PLL FREQUENCY SYNTHESIZER, AND IF COUNTER FOR CAR-MOUNTED FM/MW/LW RADIO

µPD17012GF-055
6.1.2 Preset scan
The preset scan operation is started by pressing the
the preset scan operation is shown below.
PSCAN
key in TUNER mode. The timing chart showing
Figure 6-2. Timing Chart in Preset Scanning
MUTE
1
40 ms
2
3
490-500 ms
Key ON
5 sec.
1
40 ms
2
3
490-500 ms
1 MUTE first-out and beep output
2 Frequency division ratio setting
3 MUTE last-out output
6.1.3 Preset memory writing
Writing in the preset memory is performed by pressing key
M1
to
M6
for 2 seconds or longer
when initialize diode MESEL = 0 in TUNER mode, or by pressing these keys in the preset memory write enable mode
when MESEL = 1.
The timing chart showing the preset memory writing operation is shown below.
If the station being received is an FM RDS station, PI code of the station is written simultaneously.
Figure 6-3. Timing Chart in Preset Memory Write (1/2)
(at MESEL = 0)
BEEP
1
approx. 2 sec.
2
3
40 ms
Key ON
1 Preset memory read/write judgment wait
2 Preset memory write
3 PI code write (upon reception of the FM RDS station)
44