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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)： | 16/98頁 |
| 文件大小： | 467K |
| 代理商： | UPD178024GC-051 |
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Data Sheet U14608EJ1V0DS00
16
μ
PD178024GC-051
Pin No.
Symbol
Pin Name
Description
I/O Type
This pin inputs an EJECT key signal.
Connect a momentary key to this pin.
Input a signal to this pin as follows:
EJECT Pin
Description
0
EJECT key on
1
EJECT key off
71
EJECT
EJECT key signal
input
(0: Low level, 1: High level)
Input
This pin inputs a signal indicating that the front panel is
attached/detached.
Input a signal to this pin as follows:
DTH Pin
Description
0
Front panel is correctly attached.
1
Front panel is detached.
(0: Low level, 1: High level)
72
DTH
Front panel
detachment signal
input
If the front panel is detached, the power is forcibly turned off.
Input
This pin inputs a signal that indicates whether the front panel is
open or closed.
Input a signal to this pin as follows:
FL PANEL Pin
Description
0
Front panel is closed.
1
Front panel is open.
(0: Low level, 1: High level)
73
FL PANEL
Front panel open
signal input
The disc cannot be ejected when the front panel is closed.
Input
74
REGCPU
CPU power supply
regulator
CPU power supply regulator pin.
Connect this pin to the GND pin via a 0.1
μ
F capacitor.
75
GND
Ground
Ground pin of the device.
Ground this pin.
76
77
X2
X1
Crystal resonator
This pin connects a crystal resonator.
Connect a 4.5 MHz crystal resonator to this pin.
78
REGOSC
Oscillator regulator
Oscillator regulator pin.
Connect this pin to the GND pin via a 0.1
μ
F capacitor.
79
V
DD
Power supply
Positive power supply pin of the device.
Supply 5 V
±
10% to this pin when the device is operating.
80
RESET
Reset input
Reset input pin of the device.
Input a high level to this pin when the device is operating.
If a low-level pulse is input to this pin for 10
μ
s or longer, the device
is reset.
Input
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