53
No. Symbol
I/O Explain
1 AMANT
I
AM antenna input
AM antenna input high impedance AMANT pin is connected with
an all antenna by way of 4.7
µ
H. (LAU type inductor) A series circuit
including an inductor and a resistor is connected with RF ground for
the countermeasure against the ham of power transmission line.
2 RFGND
RF ground
Ground of antenna block
3 FMANT
I
FM antenna input
Input of FM antenna 75
Ω
Surge absorber
(DSP-201M-S00B)
is necessary.
4 VCC
power supply
The power supply for analog block. D.C 8.4V
±
0.3V
5 SL
O
signal level
Output of FM/AM signals level
6 CE2
I
chip enable-2
Chip enable for EEPROM ”Low” active
7 WC
I
write control
You can write EEPROM, when EEPROM write control is “Low”.
Ordinary non connection
8 CE1
I
chip enable-1
Chip enable for AF•RF ”High” active
9 CK
I
clock
Clock
10 DI
I
data in
Data input
11 LDET
O
lock detector
“Low” active
12 OSCGND
osc ground
Ground of oscillator block
13 ROM_VDD
power supply
Power supply for EEPROM pin 13 is connected with a power supply of
micro computer.
14 DO
O
data out
Data output
15 DGND
digital ground
Ground of digital block
16 NC
non connection
Not used
17 VDD_3.3
power supply
The power supply for digital block. 3.3V
±
0.2V
18 RDS_CK
O
RDS clock
Output of RDS clock(2.5V)
19 RDS_DATA
O
RDS data
Output of RDS data(2.5V)
20 RDS_LOCK
O
RDS lock
Output unit “High” active(2.5V) (RDS_LOCK turns over by the
external transistor. “Low” active)
21 RDS_HSLK
O
RDS high speed
Output unit “High” active(2.5V)(RDS_HSLK turns over by the
lock
external transistor. “Low” active)
22 AUDIOGND
audio ground
Ground of audio block
23 L ch
O
L channel output
FM stereo “L-ch” signal output or AM audio output
24 R ch
O
R channel output
FM stereo “R-ch” signal output or AM audio output
FMRF
ANT adj
RF adj
FM ANT
T51
CF52
CF51
RFGND
OSCGND
DGND
AUDIOGND
NC
VCC
VDD_3.3
3.3V
2.5V
IC 4
3.3V
2.5V
←
IC 2
2.5V
WC
CE2
ROM_VDD
SL
DI
CK
CE1
LDET
DO
RDS_CK
RDS_DA
T
A
RDS_LOCK
RDS_HSLK
7 6
13
5
10 9 8
11
14
18 19
20
21
1
3
2
12
15
22
16
4
17
IC 1
3.3V
AM ANT
FMRF
ATT
LPF
OSC
IC 3 EEPROM
5.0V
IC 5
5V
3.3V
←
ATT
MIXER, IF AMP
DET, FM MPX,
RDS DECODER
24
23
Rch
Lch
-
FM/AM Tuner Unit
5
6
7
8
F
E
D
C
B
A
5
6
7
8
DEH-P4500R/XM/EW
