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PDF UPD17071GB-012-1A7 Data sheet ( Hoja de datos )
| Número de pieza | UPD17071GB-012-1A7 | |
| Descripción | 4-BIT SINGLE-CHIP MICROCONTROLLER WITH PLL FREQUENCY SYNTHESIZER CONTROLLER FOR PORTABLE FM/AM RADIO AND TV | |
| Fabricantes | NEC | |
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PRELIMINARY DATA SHEET
MOS INTEGRATED CIRCUIT
µPD17071GB-012
4-BIT SINGLE-CHIP MICROCONTROLLER WITH PLL FREQUENCY
SYNTHESIZER CONTROLLER FOR PORTABLE FM/AM RADIO AND TV
DESCRIPTION
The µPD17071GB-012 is a CMOS microcontroller with an on-chip PLL frequency synthesizer for receiving
international FM and AM and Japanese TV broadcasting.
In addition, because it includes a prescaler (230 MHz MAX.), IF counter, and LCD controller/driver, it constitutes
a high-performance, multi-function FM, AM, or TV tuner on a single chip.
Housed in a 56-pin QFP and driven by two dry cells at a low voltage (VDD = 1.8 to 3.6 V), the µPD17071GB-012
is ideal for creating a compact portable clock radio and radio cassette recorder.
FEATURES
• Preset memory
Three bands: FM, AM, and Japanese TV (1 to 12
channels)
10 stations for each band, totaling 30 stations
• Last channel memory
One station for each band, totaling 3 stations
• Tuning function
• Manual seek/auto seek
• Auto store memory
• Preset memory call
• LCD controller/driver
(1/4 duty, 1/2 bias, 3.1-V driven, frame frequency:
62.5 Hz)
• Watch function
12-hour or 24-hour indication
• Alarm function
Outputs alarm sound at set time every day
• Sleep timer function
Turns off radio after set time
(Time can be set in a range of 30 to 120 minutes in
units of 30 minutes.)
• Low-voltage operation
VDD = 1.8 to 3.6 V
ORDERING INFORMATION
Part Number
µPD17071GB-012-1A7
Package
56-pin plastic QFP (10 × 10 mm, 0.65 mm pitch)
The information in this document is subject to change without notice.
Document No. U12320EJ1V0DS00 (1st edition)
Date Published July 1997 N
Printed in Japan
©
19957
1 page  
µPD17071GB-012
Tuning Function
(1) Manual tuning
Type
Manual up
Manual down
Description
Increments or decrements frequency one step each time the corresponding key is pressed.
(2) Auto tuning
Type
Seek up
Seek down
Description
Searches station in up or down direction and, when station has been found, holds frequency of station.
(3) Preset memory
Stores 10 stations for each band (FM, AM, and TV) by using 10 buttons, totaling 30 stations.
(4) Preset memory call
Receives the frequency written to the preset memory.
(5) Auto store memory
Searches all the frequencies in the received band, and automatically writes the frequencies of stations to the
preset memory.
(6) Last channel memory
Stores the frequency of the station received last in each of the three bands (FM, AM, and TV), totaling three
stations.
5
5 Page 
µPD17071GB-012
Pin No.
19
Symbol
EO
20 VCOL
21 VCOH
22 REG0
Pin Name
Error out
AM local
oscillation input
Description
I/O Form
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
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
10.71 MHz
Other than 10.71 MHz
Frequency range
(MHz)
5 to 50
0.3 to 8
Minimum amplitude
(Vp-p)
0.2
0.2
Because an internal AC amplifier is provided, cut the DC component
FM local
oscillation input
of the input signal with a capacitor.
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)
4 to 230
Minimum amplitude (Vp-p)
0.2
Because an internal AC amplifier is provided, cut the DC component
of the input signal with a capacitor.
Power supply pin
This is a voltage regulator pin for PLL.
Connect this pin to GND via a 0.1-µF capacitor.
It outputs a low level when the radio is off.
—
REG0
0.1µF
23 VDD Power supply pin This is a power supply pin.
—
It supplies a voltage of VDD = 1.8 to 3.6 V (TA = –20 to +70 °C) to
operate all the functions.
Do not apply a voltage higher than that applied to the VDD pin to any
pin other than the VDD pin.
24
XOUT
Crystal resonator These pins are used to connect a crystal resonator for system clock
CMOS
oscillation.
push-pull
25 XIN
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.
11
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