參數(shù)資料
型號(hào)： UPD178024GC-051
廠商： NEC Corp.
元件分類： 通用總線功能
英文描述： 8-BIT SINGLE-CHIP MICROCONTROLLER WITH ON-CHIP PRESCALER, PLL FREQUENCY SYNTHESIZER, AND IF COUNTER FOR AUTOMOTIVE FM/MW/LW RADIO WITH CD PLAYER
中文描述： 8位單片機(jī)具有片上標(biāo)器，鎖相環(huán)頻率合成器，如柜臺(tái)，汽車調(diào)頻/中波/龍運(yùn)收音機(jī)帶CD播放器
文件頁(yè)數(shù)： 9/98頁(yè)
文件大?。?/td> 467K
代理商： UPD178024GC-051
Data Sheet U14608EJ1V0DS00
9
μ
PD178024GC-051
Pin No.
Symbol
Pin Name
Description
I/O Type
21
GNDPORT
Port ground
This is the ground pin for ports.
Connect this pin to the GND pin.
22
V
DD
PORT
Power supply
This is the positive power supply pin for ports.
Connect this pin to the V
DD
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
23
PKUP_LM
Pickup position
error signal input
(0: Low level, 1: High level)
Input
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
24
CTLD63702
CLK
Servo IC clock
oscillation control
signal output
(0: Low level, 1: High level)
CMOS
push-pull
output
25
26
27
NC
No connection
These pins are not connected.
Connect each of these pins to the V
DD
pin or GND pin via resistor.
28
AMIFC
AM band
intermediate
frequency input
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 1/2V
DD
)
during auto tuning of the AM band (MW, LW), but at all other times
the pin goes into a high-impedance state.
Input
29
FMIFC
FM band
intermediate
frequency input
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 1/2V
DD
)
during auto tuning of the FM band, but at all other times the pin
goes into a high-impedance state.
Input
30
V
DD
PLL
PLL power supply
Positive power supply pin for PLL.
Connect this pin to the V
DD
pin.
Insert a 100 pF capacitor between the V
DD
PLL and GNDPLL pins.
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