UPD178024GC-051 Datasheet, PDF (9/98 Pages) NEC – 8-BIT SINGLE-CHIP MICROCONTROLLER WITH ON-CHIP PRESCALER, PLL FREQUENCY SYNTHESIZER, AND IF COUNTER FOR AUTOMOTIVE FM/MW/LW RADIO WITH CD PLAYER

µPD178024GC-051
Pin No. Symbol
21 GNDPORT
22 VDDPORT
23 PKUP_LM
24 CTLD63702
CLK
25 NC
26
27
28 AMIFC
29 FMIFC
30 VDDPLL
Pin Name
Port ground
Power supply
Pickup position
error signal input
Servo IC clock
oscillation control
signal output
No connection
AM band
intermediate
frequency input
FM band
intermediate
frequency input
PLL power supply
Description
This is the ground pin for ports.
Connect this pin to the GND pin.
This is the positive power supply pin for ports.
Connect this pin to the VDD pin.
This pin inputs the pickup position error signal from the CD player
(CDC-01KG).
Pull up this pin externally.
Input a signal to this pin as follows:
PKUP_LM Pin
Description
0
Pickup position error detected
1
Normal pickup position
(0: Low level, 1: High level)
This pin outputs a servo IC clock oscillation control signal to the
CD player (CDC-01KG).
This pin outputs the following signal depending on the oscillation
control status of the servo IC clock.
CTLD63702CLK
Pin
Oscillation Control of Servo IC Clock
0
Oscillation enabled
1
Oscillation disabled
(0: Low level, 1: High level)
These pins are not connected.
Connect each of these pins to the VDD pin or GND pin via resistor.
I/O Type
−
−
Input
CMOS
push-pull
output
−
This pin inputs the intermediate frequency of the AM band (MW,
LW) of the radio.
Because it is connected to an internal AC amplifier, connect a
capacitor to this pin in series to cut off the DC component.
This pin is used to detect a station during auto tuning of the AM
band (MW, LW) of the radio.
For how to detect a station, refer to “3.4 Station Detection”.
The voltage on this pin is at the intermediate level (about 1/2VDD)
during auto tuning of the AM band (MW, LW), but at all other times
the pin goes into a high-impedance state.
This pin inputs the intermediate frequency of the FM band of the
radio.
Because it is connected to an internal AC amplifier, connect a
capacitor to this pin in series to cut off the DC component.
This pin is used to detect a station during auto tuning of the FM
band of the radio.
For how to detect a station, refer to “3.4 Station Detection”.
The voltage on this pin is at the intermediate level (about 1/2VDD)
during auto tuning of the FM band, but at all other times the pin
goes into a high-impedance state.
Positive power supply pin for PLL.
Connect this pin to the VDD pin.
Insert a 100 pF capacitor between the VDDPLL and GNDPLL pins.
Input
Input
−
Data Sheet U14608EJ1V0DS00
9