PD17012GF-058_15 Datasheet, PDF (56/94 Pages) Renesas Technology Corp – PLL FREQUENCY SYNTHESIZER AND CONTROLLER FOR FM/MW/LW TUNER (AUTOMOBILE APPLICATION)

µPD17012GF-058
(2) ALARMIN pin
The signal indicating that the car door is open or closed is input.
• When the ALARM key has been turned on with the ALARMIN pin at the low level
ALARMIN pin
At the low level
At the high level
The door is closed.
The door is open.
State
• When the ALARM key has been turned on with the ALARMIN pin at the high level
ALARMIN pin
At the low level
At the high level
The door is open.
The door is closed.
State
(3) ALARMOUT pin
The state upon warning is output.
This pin is used as a power-on signal for the peripheral hardware, such as an electronic volume control or amplifier.
ALARMIN pin
At the low level
At the high level
State
Alarm mode off
Alarm mode on (alarm being output)
(4) ALARM key
When this key is pressed with both of the following conditions satisfied, the alarm function is activated.
• The ignition switch is off.
• The DISALARM initial setting diode is set to 0.
The ALARM key is effective only when the IGNITION pin = 0.
(5) P.SCAN key
When this key is pressed and held down for two seconds or more with both of the following conditions satisfied,
the system enters the alarm time setting state.
• The ignition switch is off.
• The DISALARM initial setting diode is set to 0.
(6) MAN UP key
When this key is pressed in the alarm time setting state, the set time is incremented by one step (one second).
When this key is pressed and held down for two seconds or more, the set time is incremented continuously at
a rate of one step per 50 ms.
(7) MAN DWN key
When this key is pressed in the alarm time setting state, the set time is decremented by one step (one second).
When this key is pressed and held down for two seconds or more, the set time is decremented continuously at
a rate of one step per 50 ms.
Figure 3-1 outlines the setting and operation of alarm mode. Figures 3-2 to 3-4 show the transition of the alarm
operations.
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