PD178016GC-051_15 Datasheet, PDF (32/96 Pages) Renesas Technology Corp – 8-BIT SINGLE-CHIP MICROCONTROLLER WITH BUILT-IN PRESCALER, PLL FREQUENCY SYNTHESIZER, AND IF COUNTER FOR AUTOMOTIVE FM/MW/LW RADIO APPLICATIONS

µPD178016GC-051
Momentary key
Description
RDS/REGION This key acts as a REGION mode ON/OFF key when held down for two seconds. When it is released within
two seconds, this key acts as an RDS mode ON/OFF key.
(1) RDS mode ON/OFF setting
This key is valid while an FM band is being received in radio mode.
When RDS mode is ON, LCD indicator “RDS” appears.
While RDS mode is selected, the following processing is performed.
• AF operation and best station are performed.
• PI seek is performed if best station has failed.
• RDS seek is performed for seek and auto-retuning.
(2) REGION mode ON/OFF setting
This key is used to select the method used to judge the PI code of the RDS station to which the device
is switched when AF switching to an RDS station in the FM band and PI seek occur.
This key is valid while an FM band is being received in radio mode.
If initial setting diode REGION is open, however, turning ON/OFF REGION mode is invalid, and RDS
mode ON/OFF setting becomes valid as soon as this key is pressed.
When REGION mode is ON, LCD indicator “REGION” appears.
When PI codes are compared in REGION mode, 12 bits of the PI codes, except the area cover codes of
the PI codes, are compared. If the area cover code is 0 to 2, however, 16 bits of a PI code are
compared.
When REGION mode is OFF, 16 bits are compared when PI codes are compared.
REPEAT
RDS mode and REGION mode are OFF in the initial state after the power is first applied.
This key acts as the disc repeat mode ON/OFF key when it is held down for two seconds. When it is
released within two seconds, this key acts as the repeat mode ON/OFF key. This key is valid in CD changer
mode.
• ^{Repeat mode ON/OFF setting}
When repeat mode is ON, only the track currently being played is repeated.
In repeat mode, LCD indicator “REPEAT” appears.
• ^{Disc repeat mode ON/OFF setting}
When disc repeat mode is ON, all the tracks of the disc currently being played are repeated.
In disc repeat mode, LCD indicators “REPEAT” and “ALL” appear.
Both repeat mode and disc repeat mode are OFF in the initial state after the power is first applied.
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