PD17012GF-055_15 Datasheet, PDF (20/84 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
2.4.2 Momentary key
Symbol
M1
M2
M3
M4
M5
M6
POWER
Description of Functions
Performs reading or writing of the preset memory.
The read/write procedure differs depending on the MESEL switch of the initialize diode.
• If MESEL = 0:
If keys
M1
to
M6
are released within 2 seconds, it will result in a
memory read operation. If they are kept pressed for 2 seconds or longer, it will result in
memory write operation.
• If MESEL = 1:
If the key is pressed while the ME segment of the LCD display is lit, it results in a memory
write operation.
If the key is pressed while the ME segment of the LCD display is unlit, it results in a
memory read operation.
If the station to be received is an RDS station, the PI code of the station is also memorized by the
preset memory write operation.
If the PI code is memorized in the preset memory, and the frequency cannot be received or the
received PI code is different from that of the station, the PI search starts seeking the station that
meets the stop condition, searching from the preset frequency upward. If it detects the station, it
will receive from the station. If no station meets the stop condition, the PI search retains the initial
frequency.
When preset memory is called or written, band/preset is displayed for 5 seconds.
This is the power key.
By pressing this key, it switches power-ON/OFF.
18