Ic Pin Function Description - Sony XR-L500 Service Manual

XR-L500/L500V/L500X
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6-11. IC PIN FUNCTION DESCRIPTION

• MAIN BOARD IC501 MN101C49KTF (SYSTEM CONTROLLER)
Pin No. Pin Name
1 VREF–
2 VSM
3 NIL
4 KEYIN1
KEYIN0
5
RCIN0
6
QUALITY
7
MPTH
8
9 DSTSEL
10 VREF+
VDD
11
OSCOUT
12
OSCIN
13
14 VSS
XI
15
TE
XO
16 L 13942296513
17 MMOD
LCDSO
18
19 LCDCE
LCDCKO
20
21 NCO
22 SIRCS_RESET
23 LCUBE_SEL
24 SYSRST
25 BUSON
26 KEYACK
27 DAVN
28 BUIN
29
SIRCS
30, 31 NIL
32 NIH
33 RESET
34
TUNON
35
BEEP
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36 PW_ON
37
NCO
.
38 ACCIN
39
NCO
40 TELATT
26
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I/O
I Reference voltage (0V) input terminal (for A/D converter)
FM and AM signal meter voltage detection signal input from the FM/AM tuner unit (TU1)
I
(A/D input)
I Not used (fixed at "L")
Key input terminal (A/D input) LSW902, LSW905, LSW906, LSW909 to LSW911, S902 to
I
S905 (MENU, SOUND, ENTER, PTY, LIST, AF, TA, > M SEEK+, . m SEEK–,
PRESET+, PRESET– keys input)
Key input terminal (A/D input) LSW901, LSW903, LSW904, LSW914 to LSW919, S906, S907
I
(OFF, SOURCE, MODE o, SHUF 6, 5, 4, 3 REP, 2, 1 keys input)
I Rotary remote commander key input terminal (A/D input)
I Noise level detection signal input at SEEK mode (A/D input)
I Multi-path detection signal input from the RDS decoder (IC51) (A/D input)
Destination setting terminal
I
"L": XR-L500X, center voltage: XR-L500, "H": XR-L500V
I Reference voltage (+5V) input terminal (for A/D converter)
—
Power supply terminal (+5V)
O Main system clock output terminal (18.432 MHz)
I Main system clock input terminal (18.432 MHz)
— Ground terminal
I
Sub system clock input terminal (32.768 kHz)
O
Sub system clock output terminal (32.768 kHz)
I
Selection signal of memory mode input terminal "L": single chip mode (fixed at "L")
O Serial data output to the liquid crystal display driver (IC900)
O Chip enable signal output to the liquid crystal display driver (IC900) "H" active
O Serial data transfer clock signal output to the liquid crystal display driver (IC900)
O Not used (open)
O SIRCS reset signal output terminal Not used (open)
I Destination setting terminal "H": L-cube model Fixed at "L" in this set
O
Reset signal output to the SONY bus interface "L": reset Not used (pull up)
O Bus on/off control signal output to the SONY bus interface "L": bus on Not used (pull up)
Input of acknowledge signal for the key entry Acknowledge signal is input to accept function
I
and eject keys in the power off status On at input of "H"
Synchronized detection signal of RDS data block input from the RDS decoder (IC51)
I
"H" active
I Battery detection signal input terminal "L" is input at low voltage
I
SIRCS remote control signal input from the remote control receiver (IC971)
I Not used (fixed at "L")
I Not used (fixed at "H")
System reset signal input from the reset signal generator (IC551) and reset switch (S551)
I
"L": reset "L" is input for several 100 msec after power on, then it changes to "H"
O Tuner system power supply on/off control signal output "H": tuner power on
O Beep sound drive signal output to the power amplifier (IC751)
O Main system power supply on/off control signal output "H": power on
x ao
y
I Not used (open)
i
I Accessory detection signal input "L": accessory on
O Not used (open)
I Telephone attenuate signal input At input of "H", the signal is attenuated by –20 dB
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