RXD-M55-H/M55-N/M55-S/M55E-H/M55E-N/M55E-S
13
CIRCUIT DESCRIPTION
Pin No.
Pin Name
I/O
Pin Description
1
QUAL
O
Output for signal quality indication.
2
RDATA
O
Demodulation data output.
3
VREF
I
Reference voltage input.
4
MUX
I
Composite signal input.
5
VDD1
-
Analog power supply.
6
VSS1
-
Analog GND.
7
VSS3
-
Analog GND.
8
CMP
I
Comparator.
9
T2
I
Test pin (connected to be ground).
10
T1
I
Test pin (connected to be ground).
11
VSS2
-
Digital GND.
12
VDD2
-
Digital power supply.
13
XI
I
Crystal oscillation circuit input.
14
XO
O
Crystal oscillation circuit output.
15
N.C.
-
Unused.
16
RCLK
I/O Demodulation clock.
Pin No.
Pin Name
I/O
Pin Description
1
DI
I
Serial data input pin for control.
2
CE
-
Chip enable pin.
3
VSS
-
Ground pin.
4
LOPOUT
O
Output pin of general-purpose operation amplifier.
5
LINM
I
Non-inverted input pin of general-purpose operation amplifier.
6
LINP
I
Non-inverted input pin of general-purpose operation amplifier.
7
LOUT
O
ATT + equalizer output pin/ capacitor connection pin comprising filter for super-bass.
10,9,28,
LBASS1,LBASS2
Capacitor and resistor connection pins comprising filters for
29,8,30
RBASS1,RBASS2
-
bass and super-bass band or for mid and bass band.
LSB,RSB
11
LTRE
-
Capacitor connection pin comprising treble band filter.
12
LVRIN
I
Volume input pin.
13
LSEL0
O
Input selector output pin.
14,24
L5,R5
I
Input signal pin (open).
15,23
L4,R4
I
AUX input.
16,22
L3,R3
I
TUNER input.
17,21
L2,R2
I
DECK (playback) input.
18,20
L1,R1
I
CD input.
19
VREF
-
Reference voltage for analog ground.
25
RSEL0
O
Input selector output pin.
26
RVRIN
I
Volume input pin.
27
RTRE
-
Capacitor connection pin comprising treble band filter.
31
ROUT
O
ATT + equalizer output pin/ capacitor connection pin comprising filter for super-bass.
32
RINP
I
Non-inverted input pin of general-purpose operation amplifier.
33
RINM
I
Non-inverted input pin of general-purpose operation amplifier.
34
ROPOUT
O
Output pin of general-purpose operation amplifier.
35
VDD
-
Power supply pin.
36
CL
I
Clock input pin for control.
6-4 Electronic Volume System IC : LC75343M : (X29, IC601)
6-5 RDS Demodulator IC : BU1923F (X29, IC801) E/T Type only