PD17012GF-055_15 Datasheet, PDF (22/84 Pages) Renesas Technology Corp – SINGLE-CHIP MICROCONTROLLER WITH ON-CHIP PRESCALER, PLL FREQUENCY SYNTHESIZER, AND IF COUNTER FOR CAR-MOUNTED FM/MW/LW RADIO

µPD17012GF-055
Symbol
ASM
MONO
PI
NR
METAL
Description of Functions
This is the auto store memory operation key. It is valid only in RADIO mode.
If it is pressed, a search is made from the lowest frequency to the highest frequency of the
relevant band to write six stations into preset memory in ascending order of the frequency,
starting from the station whose SD is strongest.
If the searched station is an RDS, PI code of the station is stored simultaneously.
Data on the detected broadcasting stations are written to one preset memory after another,
starting from preset memory 1. If the maximum frequency is reached before the six stations are
written, the previous frequencies stay in the remaining preset memories.
If this key is pressed again during the auto store memory operation, the operation is suspended.
However, the broadcasting stations which have already been detected are written in the preset
memory. During auto store memory operation, the band received and ASM are displayed.
The operation of each key during an auto store memory operation is shown below.
Key
ASM
SELECT
VOLUP
VOLDOWN
ATT/LOUD
Description of Operations
The auto store memory operation is stopped, and if more than one
station is found, M1 is received.
If no station is found, the frequency at the beginning of the operation
is received.
The auto store memory operation is continued.
The operation of the pressed key is performed.
Operating any momentary key other than above keys is invalid.
This key sets forced monaural mode in RADIO mode.
It is valid only when the FM band is selected in RADIO mode.
If this key is pressed, the “MONO” display on the LCD panel is lit thus placing the device in
forced monaural mode.
During forced monaural mode, high level is output from the “MONO” pin.
If this key is pressed again during forced monaural mode, the “MONO” display is extinguished
and the mode is canceled. In the forced monaural mode, the “STEREO” display is unlit even
when a stereo signal is input.
This is a key that sets permission for PI seek operation.
When this key is pressed, the “PI” display lights on the LCD panel, and the PI seek permission
status is entered. In the PI seek permission status, if a preset is called up, and the received PI
code differs from the PI code stored in preset memory, PI seek is performed.
When the key is pressed again while in PI seek permission status, the “PI” display is
extinguished, and then even if the PI code stored in preset memory differs from the called out
broadcast station PI code, no PI seek is performed.
This is the ON/OFF key for tape noise reduction.
It is invalid in other than TAPE mode.
If this key is pressed, the “NR” display on the LCD panel is lit, turning on NR. While the “NR”
display is lit, high level is output from the NR pin.
If this key is pressed again while the “NR” display is lit, the “NR” display is extinguished,
thus turning off NR.
This is the normal/metal tape switchover key.
It is invalid in other than TAPE mode.
If this key is pressed, the “METAL” display on the LCD panel is lit.
While the “METAL” display is lit, high level is output from the METAL pin.
If this key is pressed again while the “METAL” display is lit, the “METAL” display is extinguished.
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