PD17012GF-058_15 Datasheet, PDF (49/94 Pages) Renesas Technology Corp – PLL FREQUENCY SYNTHESIZER AND CONTROLLER FOR FM/MW/LW TUNER (AUTOMOBILE APPLICATION)

Momentary key
SCAN UP
SCAN DWN
µPD17012GF-058
Description
Key
Description
M1
The scan operation stops.
to
Either of the following operations occurs depending on the timing at which the key
M6
is released.
If the key is released within 2 seconds:
A preset memory corresponding to the pressed key is accessed.
If the key is held pressed for at least 2 seconds:
The frequency being currently received is written to the preset memory corre-
sponding to the pressed key.
Example 1. If the key is released within 2 seconds:
The tuner is set to the frequency in the preset memory corresponding
to the pressed key when the key is released. The scan operation is
canceled.
RDMUTE pin
Within 5 seconds Within 2 seconds
Seek
Hold
Hold
M1 accessed
Key pressed
Example
of display
M1
M1
key pressed key released
Blinking
CH
Blinking
Content of M1
Example 2. If the key is pressed for at least 2 seconds:
When the key is pressed for 2 seconds, the frequency on hold is
written to the preset memory corresponding to the pressed key. The
hold state is released 2 seconds after the writing to the preset
memory, and a search (seek operation) for another station begins.
RDMUTE pin
Within 5 seconds 2 seconds
2 seconds
Seek
Hold
Hold
Hold Seek
Key pressed
Example
of display
M1
held pressed
Blinking
CH
CH
Blinking
Blinking
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