XR-CA300/CA320/CA320X
42
42
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MAIN BOARD IC1 MN101C49GTH1 (SYSTEM CONTROLLER)
Pin No.
Pin Name
I/O
Description
1
VREF –
—
Reference voltage (0V) terminal (for A/D converter)
2
VSM
I
FM and AM signal meter voltage detection input from the FM/AM tuner unit (TU100)
(A/D input)
3 to 6
NCI
I
Not used (fixed at “L”)
7
NOISE-DET
I
Not used (fixed at “L”)
8
MPTH
I
Not used (fixed at “L”)
9
NCI
I
Not used (fixed at “L”)
10
VREF +
—
Reference voltage (+5V) terminal (for A/D converter)
11
VDD
—
Power supply terminal (+5V)
12
OSC2
O
Main system clock output terminal (18.432MHz)
13
OSC1
I
Main system clock input terminal (18.432MHz)
14
VSS
—
Ground terminal
15
XI
I
Sub system clock input terminal (32.768kHz)
16
XO
O
Sub system clock output terminal (32.768kHz)
17
MMOD
I
Setting terminal for the single chip mode “L”: single chip
18
LCD-SO (TX)
O
LCD serial data output to the liquid crystal display driver (IC900)
19
LCD-SI (RX)
I
LCD serial data input from the liquid crystal display driver (IC900)
20
LCD-CKO
O
LCD serial transfer clock signal output to the liquid crystal display driver (IC900)
21
PLL-SO
O
Serial data output to the FM/AM PLL (IC3)
22
PLL-SI
I
Serial data input from the FM/AM PLL (IC3)
23
PLL-CKO
O
Serial data transfer clock signal output to the FM/AM PLL (IC3)
24
LCD-RES
O
LCD reset signal output to the liquid crystal display driver (IC900) “L”: reset
25
LCD-CE
O
Chip enable signal output to the liquid crystal display driver (IC900) “H” active
26
KEYACK
I
Key acknowledge signal detect input from the liquid crystal display driver (IC900)
27
DAVN-RDS
I
Not used (fixed at “L”)
28
B/U-IN
I
Battery detect signal input from the SONY bus interface (IC800) and battery detect circuit
“L” is input at low voltage
29
NCI
I
Not used (fixed at “L”)
30
RAM BU
I
Internal RAM reset detection signal input terminal
Input terminal to check that RAM data are not destroyed due to low voltage
This checking is made within 100 msec after reset “L”: RAM reset
31
TEST-IN
I
Setting terminal for the test mode “L”: test mode, Normally: fixed at “H”
32
NCI
I
Not used (fixed at “L”)
33
RESET
I
System reset signal input from the reset signal generator (IC2) and reset switch (S1)
“L”: reset “L” is input for several 100 msec after power on, then it changes to “H”
34
PLL-CE
O
Chip enable signal output to the FM/AM PLL (IC3) “H” active
35
BEEP
O
Beep sound drive signal output to the power amp (IC500)
36
POWER-ON
O
Main system power supply on/off control signal output terminal “H”: power on
37
ILL-IN
I
Not used (fixed at “H”)
38
ACC-IN
I
Accessory detect signal input terminal “L”: accessory on
39
NCO
O
Not used (open)
40
TEL-MUTE
I
Telephone muting signal input terminal At input of “H”, the signal is attenuated by –20 dB
Used for the XR-CA320/CA320X only
41
NCI
I
Not used (fixed at “H”)
42
UNI-SO
O
Serial data output to the SONY bus interface (IC800)
43
UNI-SI
I
Serial data input from the SONY bus interface (IC800)
Pin No.
Pin Name
I/O
Description
44
UNI-CKO
O
Serial data transfer clock signal output to the SONY bus interface (IC800)
45
SDA
I/O
Not used (open)
46
NCO
O
Not used (open)
47
SCL
O
Not used (open)
48
VOL-SO
O
Serial data output to the electrical volume (IC400)
49
VOL-CE
O
Chip enable signal output to the electrical volume (IC400) “H” active
50
VOL-CKO
O
Serial data transfer clock signal output to the electrical volume (IC400)
51
AMP-ON
O
Standby on/off control signal output to the power amp (IC500)
“L”: standby mode, “H”: amp on
52
AMP-MUTE
O
Muting on/off control signal output to the power amp (IC500) “L”: muting on
53
MUTE
O
Audio line muting on/off control signal output terminal “H”: muting on
54
TU-MUTE
O
Not used (open)
55
PORT2 (ST)
I
FM stereo broadcasting detection signal input from the FM/AM tuner unit (TU100)
“L”: stereo display lighting
56
SD IN
I
Station detector detect input from the FM/AM tuner unit (TU100)
Stop level for SEEK is determined SD is present at input of “H”
57
LO/DX
O
Local/DX control signal output “L”: DX Not used (open)
58
TU-ON
O
Tuner system power supply on/off control signal output terminal “H”: tuner power on
59
FM-ON
O
FM system power supply on/off control signal output terminal
“L”: AM power on, “H”: FM power on
60
AM-ON
O
AM system power supply on/off control signal output terminal
“L”: FM power on, “H”: AM power on Not used (open)
61 to 68
NCO
O
Not used (open)
69
NOISE-ON
O
Not used (open)
70 to 82
NCO
O
Not used (open)
83
ILL-COLOR
I
Illumination color select input terminal “L”: amber illumination “H”: green illumination
84
DEST-SEL0
I
Destination setting terminal (fixed at “H”)
85
DEST-SEL1
I
Destination setting terminal XR-CA300: fixed at “L”, XR-CA320/CA320X: fixed at “H”
86
DEST-SEL2
I
Destination setting terminal XR-CA300: fixed at “L”, XR-CA320/CA320X: input for the
FREQUENCY SELECT switch (S60)
87, 88
NCO
O
Not used (open)
89
NOSE-SW
I
Front panel block remove/attach detection signal input terminal
“L”: front panel is attached
90
FLASH-W
I
Internal flash memory data write mode detection signal input terminal “L”: data write mode,
Normally: fixed at “H”
91
NCO
O
Not used (open)
92
ILL-ON
O
Power on/off control signal output of the illumination LED and LCD back light (PL901, 902)
“H”: power on
93
BUS-ON
O
Bus on/off control signal output to the SONY bus interface (IC800) “L”: bus on
94
SYS-RST
O
Reset signal output to the SONY bus interface (IC800) “L”: reset
95
DAVSS
—
Ground terminal (for D/A converter)
96
TAPE-ON
O
Capstan/reel motor (M901) drive signal output terminal “H”: motor on
97
N/R
I
Tape direction switch (S903) input terminal “L”: reverse direction “H”: forward direction
98
FF/REW
I
FF/REW detection switch (S902) input terminal “L”: FF/REW mode
99
TAPE-IN
I
Tape in detection switch (S903) input terminal “L”: tape in
100
DAVDD
—
Power supply terminal (+5V) (for D/A converter)
IC PIN FUNCTION DESCRIPTION
