參數(shù)資料
型號(hào)： 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(jī)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(yè)數(shù)： 10/48頁(yè)
文件大?。?/td> 296K
代理商： UPD17071GB-012
μ
PD17071GB-012
10
Pin No.
Symbol
Pin Name
Description
I/O Form
16
9 k/10 k
/SD
AM setting input/
SD signal input
This pin inputs an SD (Station Detector) signal.
When “Europe 1” or “Europe 2” is selected as the destination region,
this pin can be also used to input setting of a channel space in an
AM band.
Input
(1) Setting of channel space in AM band for “Europe 1” and
“Europe 2” (9 k/10k)
This setting is valid only when “Europe 1” or “Europe 2” is selected
as the destination region.
The setting is read only on power application (power-ON reset), or
when the signal input to the CE pin (pin 50) goes high (CE reset);
otherwise, it is ignored.
Input a signal to this pin as follows:
High level: Channel space 9 kHz
Low level: Channel space 10 kHz
Note that the setting of this pin is invalid when initialization diode
switch SD_IF = 1, and the channel space is 9 kHz.
(2) Input of SD signal (SD)
When a station has been detected this is identified by the signal
input to this pin and the frequency counter when initialization diode
switch SD_IF = 1.
Input a high level to this pin when a station is detected.
However, a signal input for less than 32 ms is invalid.
17
FMIFC
/AMIFC
FM/AM
intermediate
frequency input
This pin inputs an intermediate frequency (IF) in an FM or AM band.
The signal input to this pin is used to identify a station.
When initialization diode switch SD_IF = 1, however, the signal input to
this pin and the signal input to the SD pin (pin 16) are used to identify
a station.
The range of the input frequency in which detection of a station is
identified is as follows:
Input
Band
Input frequency range <1> Input frequency range <2>
FM
10.7 MHz
±
20 kHz
AM
450 kHz
±
1 kHz
459/460 kHz
±
1 kHz
TV
10.7 MHz
±
20 kHz
The conditions of input frequency ranges <1> and <2> vary as follows
depending on the setting of initialization diodes IFSEL1 and IFSEL2.
IFSEL1
IFSEL2
Selected frequency range
0
0
Input frequency range <1>
1
0
Input frequency range <2>
0
1
Input frequency range <1>
(0: Open, 1: Short)
18
GND
Ground
Ground pin
相關(guān)PDF資料
PDF描述
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