PD17012GF-058_15 Datasheet, PDF (58/94 Pages) Renesas Technology Corp – PLL FREQUENCY SYNTHESIZER AND CONTROLLER FOR FM/MW/LW TUNER (AUTOMOBILE APPLICATION)

µPD17012GF-058
Figure 3-2. Transition of Alarm Operations 1 (While Alarm Operation Is Halted)
The ignition switch is turned off
No key
Halt
(When an alarm is enabled:
DISALARM = 0)
Key input
Reads key input
Check for
the P.SCAN
key
Released within two seconds
Checks whether the P.SCAN key
is held down for two seconds
Setting completed
Held down for
two seconds
Alarm time setting
Check for the ALARM key
See Figure 3-3.
Alarm function processing
See Figure 3-4.
End of alarm processing
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