參數(shù)資料
型號: UPD17071GB-012
廠商: NEC Corp.
英文描述: 4-BIT SINGLE-CHIP MICROCONTROLLER WITH PLL FREQUENCY SYNTHESIZER CONTROLLER FOR PORTABLE FM/AM RADIO AND TV
中文描述: 4位單片機與鎖相環(huán)頻率合成器控制器的便攜式調(diào)頻/調(diào)幅廣播電視
文件頁數(shù): 11/48頁
文件大小: 296K
代理商: UPD17071GB-012
μ
PD17071GB-012
11
Pin No.
Symbol
Pin Name
Description
I/O Form
19
EO
Error out
This pin outputs PLL (Phase Locked Loop) errors.
It outputs the result of comparison between the frequency input to the
VCOH (pin 21) or VCOL (pin 20) and a set frequency.
Input frequency > Set frequency: High level
Input frequency < Set frequency: Low level
Input frequency = Set frequency: Floating
Connect this pin to a varactor diode via an external LPF (lowpass
filter).
CMOS
3-state
output
20
VCOL
AM local
oscillation input
This pin inputs local oscillation output (VCO output) in an AM band.
The signal that can be input to this pin is as follows:
Input
Selected intermediate
frequency
Frequency range
(MHz)
Minimum amplitude
(Vp-p)
10.71 MHz
5 to 50
0.2
Other than 10.71 MHz
0.3 to 8
0.2
Because an internal AC amplifier is provided, cut the DC component
of the input signal with a capacitor.
21
VCOH
FM local
oscillation input
This pin inputs local oscillation output (VCO output) in an FM and TV
band. The signal that can be input to this pin is as follows:
Input
Frequency range (MHz)
Minimum amplitude (V
p-p
)
4 to 230
0.2
Because an internal AC amplifier is provided, cut the DC component
of the input signal with a capacitor.
22
REG0
Power supply pin
This is a voltage regulator pin for PLL.
Connect this pin to GND via a 0.1-
μ
F capacitor.
It outputs a low level when the radio is off.
23
V
DD
Power supply pin
This is a power supply pin.
It supplies a voltage of V
DD
= 1.8 to 3.6 V (T
A
= –20 to +70
°
C) to
operate all the functions.
Do not apply a voltage higher than that applied to the V
DD
pin to any
pin other than the V
DD
pin.
24
X
OUT
Crystal resonator
These pins are used to connect a crystal resonator for system clock
oscillation.
Connect a 75-kHz crystal resonator across these pins.
The accuracy of the watch is affected only by the oscillation
frequency of the crystal resonator.
CMOS
push-pull
25
X
IN
0.1 F
REG0
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