PD17012GF-058_15 Datasheet, PDF (11/94 Pages) Renesas Technology Corp – PLL FREQUENCY SYNTHESIZER AND CONTROLLER FOR FM/MW/LW TUNER (AUTOMOBILE APPLICATION)

µPD17012GF-058
Pin
Symbol
No.
Pin name
Description
15
SD
SD input
SD (station detector) signal input pin
If the following voltage is applied to this pin, it is judged that an SD
is found.
Band
LOCAL/DX
mode
Voltage by which the presence of an
SD is assumed
When VDD is
set to 5 V
LOCAL
28.5
× VDD or higher
64
FM
12.5
DX
× VDD or higher
64
2.227
0.977
15.5
LOCAL
× VDD or higher
MW
64
1.211
LW
12.5
DX
× VDD or higher
0.977
64
The SD signal is used to judge whether a station is found.
16
DSP1
DSP control
Output pin for the DSP chip control signal.
17
DSP2
output
See the description of the DSP momentary key.
18
BEEP
Beep output
Beep sound output pin that functions when a momentary key is
pressed
If a momentary key is pressed, square waves (duty cycle 50 %) of
3 kHz are output for about 40 ms. This period agrees with the
period of the preceding mute.
A beep sound is output if a press of a momentary key causes the
LCD panel display or output port state to be changed, or if a hold
period of five seconds ends during scanning or preset memory
scanning.
The beep sound output is used as the alarm output when the alarm
function is used. If this output is not used, leave the pin open.
19 IGNITION Ignition input
Pin to be connected to the car ignition switch.
Input a high level signal for normal operation of the device. Input a
low level signal when the device is not being used.
20
AGCC AGC cut output AGC (auto gain control) cut signal output pin in radio mode
The output goes high in auto-tuning, as shown below.
RDMUTE
I/O type
Input
CMOS
push-pull
output
CMOS
push-pull
output
Input
CMOS
push-pull
output
<1> <2>
15 ms 40 ms
<3>
300 - 400 ms
AGCC
Key-on
Station found
<1> : Waiting for key-on chattering
<2> : Preceding mute
<3> : Following mute
9