PD17012GF-055_15 Datasheet, PDF (11/84 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
Pin No. Symbol
15
SD
Pin Name
Station detection
signal input
16 PANEL Panel detach
detection signal
input
17 PWRIN Power key input
18 ALARM Traffic information
alarm output
19
BEEP Beep output
20
BAND1 Band switchover
21
BAND0 signal output
22 MODE1 Mode signal output
23
MODE0
Description
This is the input pin for detecting broadcasting station
detection signal.
This pin is used to detect the presence of a broadcasting
station during auto-tuning.
Also, for the case where initialization diode RETUNE = 0,
if, while receiving a broadcasting station, this pin is at less
than the SD input voltage continuously for at least about 20
seconds, an upward seek operation is started.
After the PLL has locked, if a voltage greater than the SD
input voltage is applied during the SD stabilization wait
period, SD is assumed present.
In RDS mode in the FM band, the pin is checked as one of
the conditions for the start of AF operation.
This is the detachable panel detection signal input pin.
Low level is interpreted as panel in the mounted state;
high level is interpreted as panel in the detached state.
This is the input pin for power key.
It turns the power ON/OFF at the rising edge.
Also, it operates the same as the POWER
momentary key.
key of the
This is the output pin for traffic information alarm.
When there is no traffic information station identification
signal in the TP/SK mode in the FM band, an alarm sound
with a frequency of 3 kHz is output on and off about every
0.5 second.
This is the beep output pin.
It outputs about 40 ms of square waves with frequency
of 3 kHz and duty factor of 50 %.
The beeping sound is issued in the following cases:
1 When a valid key is pressed
2 When the hold of about 5 seconds during a preset
scanning operation is ended
3 When writing is performed in preset memory.
This is the band switchover signal output pin.
If a new receiving band is switched to by means of the band
switchover key, depending on the band, the following
output.
I/O Format
Input
Input
Input
CMOS
push-pull
output
CMOS
push-pull
output
CMOS
push-pull
output
Pin
Band
BAND0
BAND1
MW
0
0
LW
1
0
FM
×
1
(0 : low level 1 : high level × : don’t care)
These output pins show the operation mode of the
µPD17012GF-055. The modes are as follows:
Mode
Tuner
MODE0
0
CD
0
Tape
1
(0 : low level 1 : high level)
MODE1
0
1
0
CMOS
push-pull
output
9