PD178016GC-051_15 Datasheet, PDF (15/96 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
Pin No. Symbol
Pin name
Description
I/O type
49
D3
to
to
52
D0
Initial setting diode
return signal input
Input pins for the return signals of the initial setting diode matrix.
These pins, together with DS0 (pin 53) to DS5 (pin 58), constitute
a diode matrix.
Connect a pull-down resistor to these pins.
Input
53
DS0
to
to
58
DS5
Initial setting diode
source signal output
Output pins for the source signals of the initial setting diode matrix.
These pins, together with D3 (pin 49) to D0 (pin 52), constitute a
diode matrix.
CMOS
push-pull
output
59
BEEP
Beep signal output
Beep output pin.
A square wave with a frequency of 1.5 kHz and a duty cycle of 50
% is output for 50 ms.
A beep is output when:
• The beep is validated by pressing a key.
• The next preset memory is selected during preset memory scan
operation.
CMOS
push-pull
output
60
POWOUT Power state output Output pin indicating the power state of the system.
CMOS
push-pull
output
61
MODE0 Mode signal output Output pins indicating the operating mode.
62
MODE1
See the table below.
MODE0 MODE1
Mode
CMOS
push-pull
output
0
0
Radio
1
0
Tape
1
1
CD
(0: Low, 1: High)
Radio output mode is set when the power is first applied.
63
RDS
RDS indicator signal
input
Input pin used to detect the RDS signal of an RDS station.
Prevents the device from erroneously locking onto a non-RDS
station.
The RDS data, read when the pin is at the low level, is valid.
Pull down this pin if synchronization is to be performed using only
RDSDATA and RDSCLK during auto-tuning.
Input
64
DK
DK signal input
Input pin used to detect the DK signal of a VF station.
If both the SK and DK pins go low in standby mode, the device
judges that traffic information is being broadcast and the device
switches to standby radio mode.
If the level of the DK pin goes from low to high, the device returns
to standby mode. Pull up this pin when ARI is not to be used.
Input
65
SK
SK signal input
Input pin used to detect the SK signal of a VF station.
The input is used as the auto-tuning stop signal.
When a station is detected, if the input goes low within about 500
ms, the device judges that a traffic information station has been
detected, and auto-tuning is stopped.
Pull up this pin when ARI is not used.
Input
13