參數(shù)資料
型號： 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位單片機具有片上標(biāo)器，鎖相環(huán)頻率合成器，如柜臺，汽車調(diào)頻/中波/龍運收音機帶CD播放器
文件頁數(shù)： 8/98頁
文件大小： 467K
代理商： UPD178024GC-051
Data Sheet U14608EJ1V0DS00
8
μ
PD178024GC-051
Pin No.
Symbol
Pin Name
Description
I/O Type
13
SPEC SEL
Spectrum analyzer
SEL signal output
This pin outputs a spectrum analyzer SEL signal to a bandpass
filter IC (BA3835F).
Connect this pin to the SEL pin (pin 14) of the bandpass filter IC
(BA3835F) and externally pull up the connection line between the
pin.
In the power-on status, this pin outputs a high level.
At all other times, it outputs a low level.
N-ch
open-drain
output
14
LW
LW band select
signal output
This pin outputs the LW band select signal of the radio.
Externally pull up this pin.
When the LW band is selected in the power-on status, this pin
outputs a high level regardless of the audio source mode.
In the CD mode, it holds output in the radio mode.
At all other times, this pin outputs a low level.
N-ch
open-drain
output
15
FM
FM band select
signal output
This pin outputs the FM band select signal of the radio.
When the FM band is selected in the power-on status, this pin
outputs a low level regardless of the audio source mode.
In the CD mode, it holds output in the radio mode.
At all other times, this pin outputs a high level.
N-ch
open-drain
output
16
AM
AM band select
signal output
This pin outputs the AM band select signal of the radio.
When the AM band (MW, LW) is selected in the power-on status,
this pin outputs a low level regardless of the audio source mode.
In the CD mode, it holds output in the radio mode.
At all other times, this pin outputs a high level.
N-ch
open-drain
output
This pin outputs a forced monaural signal.
In the power-on status, this pin outputs the following signal in the
forced monaural status, regardless of the audio source band and
received band.
MONO Pin
Forced Monaural
0
Forced monaural OFF
1
Forced monaural ON
(0: Low level, 1: High level)
17
MONO
Monaural signal
output
In the CD mode, this pin holds the output in the radio mode.
At all other times, it outputs a high level.
N-ch
open-drain
output
18
19
RCMD1
RCMD2
Rotary encoder
phase signal input
These pins input the phase signal of a rotary encoder.
They are used to detect input from a rotary commander.
For details, refer to “8. ROTARY COMMANDER”.
Input
This pin inputs the POWER key signal.
Connect a momentary key to this pin.
Input a signal to this pin as follows:
POWSW Pin
Description
0
POWER key ON
1
POWER key OFF
20
POWSW
POWER key
signal input
(0: Low level, 1: High level)
Input
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