UPD178024GC-051 Datasheet, PDF (22/98 Pages) NEC – 8-BIT SINGLE-CHIP MICROCONTROLLER WITH ON-CHIP PRESCALER, PLL FREQUENCY SYNTHESIZER, AND IF COUNTER FOR AUTOMOTIVE FM/MW/LW RADIO WITH CD PLAYER

µPD178024GC-051
2.3.2 Momentary keys
Rollover of momentary keys including the POWER key is valid, and the operation of the R key is performed.
The clock can be adjusted by pressing the MAN UP/SEEK UP (NEXT/FF) key or MAN DWN/SEEK DWN
(PREV/REW) key while holding down the DISP key during clock display.
Rollover of momentary keys other than above is invalid (no key operates).
The functions of the momentary keys are explained next in alphabetical order.
Momentary Key
BAND
Function
This key selects the reception band of the radio.
It is valid in the radio mode.
Each time this key is pressed, the reception band is changed as follows:
FM1 → FM2 → FM3 → AM1 (MW1, MW) → AM2 (MW2, LW)
When the radio mode is selected for the first time after power application, the FM1 band is received.
The MW or LW band is assigned to the AM2 band depending on the region for which the set is
intended.
For assignment of the reception band, refer to “3.1 Reception Bands”.
CD
This key selects the CD mode.
It is valid if a disc is inserted in the power-off status and radio mode.
If this key is pressed when no disc is inserted in the radio mode, a message indicating that no disc is
inserted is displayed for 3 seconds.
When this key is pressed, power is turned on, the CD mode is selected, and the CD is played from the
position on the disc that was played last.
The “repeat”, “intro”, “random”, and “program” playback modes are all off when the CD mode is
selected.
If the CD mode is selected for the first time after power application, the first track of the disc is played.
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Data Sheet U14608EJ1V0DS00