Table of Contents
Advertisement
5
- FM/AM Tuner Unit
AM ANT
FMRF
1
ATT
FM ANT
3
ATT
FMRF
RF adj
ANT adj
No. Symbol
I/O Explain
1 AMANT
I
AM antenna input
2 RFGND
RF ground
3 FMANT
I
FM antenna input
4 VCC
power supply
5 SL
O signal level
6 CE2
I
chip enable-2
7 NC
non connection
8 CE1
I
chip enable-1
9 CK
I
clock
10 DI
I
data in
11 NC
non connection
12 OSCGND
osc ground
13 ROM_VDD
power supply
14 DO
O data out
15 DGND
digital ground
16 NC
non connection
17 VDD_3.3
power supply
18 NC
non connection
19 NC
non connection
20 NC
non connection
21 NC
non connection
22 AUDIOGND
audio ground
23 L ch
O L channel output
24 R ch
O R channel output
5
6
7 6
13
5
10 9 8
IC 5
IC 3 EEPROM
5 V 3.3 V
5.0 V
OSC
LPF
IC 1
3.3 V
MIXER, IF AMP
T51
CF52
IC 4
3.3 V
3.3 V
2
12
15
22
16
4
17
AM antenna input high impedance AMANT pin is connected with
an all antenna by way of 4.7 μH. (LAU type inductor)A series circuit
including an inductor and a resistor is connected with RF ground for
the countermeasure against the hum of power transmission line.
Ground of antenna block
Input of FM antenna 75 Ω Surge absorber
The power supply for analog block. D.C 8.4 V ± 0.3 V
Output of FM/AM signals level
Chip enable for EEPROM "Low" active
Not used
Chip enable for AF•RF "High" active
Clock
Data input
Not used
Ground of oscillator block
Power supply for EEPROM pin 13 is connected with a power supply of
micro computer.
Data output
Ground of digital block
Not used
The power supply for digital block. 3.3 V ± 0.2 V
Not used
Not used
Not used
Not used
Ground of audio block
FM stereo "L-ch" signal output or AM audio output
FM stereo "R-ch" signal output or AM audio output
DEH-P490IB/XN/UC
6
7
11
14
18 19 20 21
IC 2
2.5 V
DET, FM MPX
2.5 V
2.5 V
(DSP-201M-S00B)
7
8
A
Rch
24
Lch
23
B
C
is necessary.
D
E
F
69
8
Hide quick links:
Advertisement
Table of Contents
