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参数资料
| 型号： | D1723GF |
| 厂商： | NEC Corp. |
| 英文描述： | PLL FREQUENCY SYNTHESIZER AND CONTROLLER FOR FM/MW/LF TUNER CAR AUDIO |
| 中文描述： | 锁相环频率合成器和控制器的调频/中波/低频调谐器汽车音响 |
| 文件页数： | 11/80页 |
| 文件大小： | 1590K |
| 代理商： | D1723GF |
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11
μ
PD1723GF-013,
μ
PD1723GF-213
PIN NAME
PIN No.
SYMBOL
DESCRIPTION
OUTPUT
TYPE
MONO
MONO
NR
LOUD
AMS
AMD signal
output
20
AMS
CMOS
pushpull
In the radio mode, this pin operates as the MONORAL
signal output pin and in the tape mode, this pin oper-
ates as the NOISE REDUCTION signal output pin.
Radio mode
Each time the
key is pressed on the
FM and VF bands, the output is inverted. When the
device is set to the MONORAL state by
key, the LCD panel “MONO” display lights and high
level is output from this pin.
On the MW and LW bands, this pin becomes low.
When the power is turned on, this pin becomes low.
Tape mode
This pin is valid when the diode matrix ENNR2
switch to be described later is 1 (shorted by diode).
When NOISE REDUCTION NR
2
is selected by press-
ing the
key or NOISE REDUCTION
function key (selected by diode matrix), high level is
output. At this time, the LCD panel “NR
2
” display
lights.
In the radio monitor and DK ON modes, the "MONO"
display is inverted and the MONO/NR
2
pin is made
MONO output by pressing the key.
When the power is turned on, this pin becomes low.
LOUDNESS signal output pin.
In the radio, tape, and CD modes, the output is inverted
each time the
key is pressed. When the
LOUDNESS state is selected by
key,
the LCD panel “LOUD” display lights and high level is
output from this pin.
When the power is turned on, this pin becomes low.
Tape mode AMS (AUTO MUSIC SEARCH) control signal
output pin.
Its output is inverted each timer the
key
is pressed.
High level is output while the LCD panel “AMS” dis-
play is lit.
LOUD
Monaural
and noise
reduction
output
18
MONO/NR
2
LOUD output
19
LOUD
CMOS
pushpull
CMOS
pushpull
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