PD17012GF-058_15 Datasheet, PDF (37/94 Pages) Renesas Technology Corp – PLL FREQUENCY SYNTHESIZER AND CONTROLLER FOR FM/MW/LW TUNER (AUTOMOBILE APPLICATION)

µPD17012GF-058
Momentary key
M1
M2
M3
M4
M5
M6
Description
Description
Pressing one of the M1 to M6 keys and releasing it within 2 seconds calls the content of the
corresponding preset memory when the key is released.
Example
RDMUTE
pin output
15 ms
2 sec
Beep
40 ms
400 - 500 ms
Key
operation
M1
to
M6
keys are on
Display Frequency or
clock display
Keys are off
The preset memory The preset memory number
number correspond- corresponding to the pressed
ing to the pressed key is displayed.
key is displayed. The frequency recorded in the
The frequency pre- preset memory is displayed.
viously received
is displayed.
When the frequency recorded in the currently selected preset memory is being received,
pressing the key corresponding to this preset memory does not trigger any operation except
during clock display. During clock display, pressing the key not only generates a beep but also
switches to the frequency display. Pressing the key, however, does not generate the radio
mute signal.
During the seek operation, pressing the key immediately accesses the preset memory.
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