PD17012GF-058_15 Datasheet, PDF (35/94 Pages) Renesas Technology Corp – PLL FREQUENCY SYNTHESIZER AND CONTROLLER FOR FM/MW/LW TUNER (AUTOMOBILE APPLICATION)

µPD17012GF-058
Momentary key
Description
DSP
Pressing the DSP key switches the output of the DSP1 and DSP2 pins, as follows. The initial value is
NORMAL. While the power is off, the output mode is NORMAL.
DSP1
0
0
1
1
DSP2
0
1
0
1
Output mode
NORMAL
CLASSIC
ROCK
POP
(1: Shorted by the diode; 1: Open)
In radio, tape, and CD modes, the output mode which was used last is recorded in memory for each mode.
LOUD/
ILLUMI-
NATION
Example
Radio mode
(CLASSIC)
Last state
Tape mode
(ROCK)
Radio mode
(CLASSIC)
In radio, tape, or CD mode, "NORMAL," "CLASSIC," "ROCK," or "POP" is displayed, according to the
output mode.
Key for switching LOUD (loudness) control and illumination control.
(1) Loudness control
It is effective in radio, tape, and CD modes.
Each time the LOUD/ILLUMINATION key is pressed, the control of loudness and the electronic
volume control loudness function are switched on or off.
The following table lists the states of loudness, “LOUD” display, the LOUD pin output, and the elec-
tronic volume control IC.
Loudness state “LOUD” display LOUD pin
Electronic volume
control IC state
ON
Lights
High level Loudness ON mode^Note
OFF
Does not light
Low level Loudness OFF mode^Note
Switching radio, tape, or CD mode does not affect the state of loudness.
Note In loudness ON mode, set the gain of the electronic volume to +7.5 dB.
In loudness OFF mode, set the gain of the electronic volume to 0 dB.
(2) Illumination control
Illumination control is effective in radio, tape, and CD modes.
When this key is pressed and held down for two seconds or more, the previous ILLUMI output is
inverted. The initial value is low-level output. The illumination control, however, can be enabled or
disabled by using the ILLA and ILLB initial setting diodes (see Section 2.6.1).
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