Sony MZ-R55 Service Manual page 109

• IC802 CXP740010 (SYSTEM CONTROL)
Pin No. Pin name I/O
1 CLKCS O Chip select output to real time clock (IC805).
2 XRST O Reset output. L : Reset
3 WRPWR O Laser power switching signal output.
4 TX O Write data transfer timing output.
5 SDI2 I Serial data input.
6 SDO2 O Serial data output.
7 SCK2 O Serial clock output.
8 XRF-STBY O Power control output to RF amplifier (IC501).
9 SSB I/O SSB data signal input and output.
10 SSB SCK I/O SSB clock signal input and output. (Not used (Open).)
11 DTCK I/O Remote control data signal input/output.
12 SPCK — Not used (Open).
13 WP I Wake-up signal input from remote control key and this unit key.
14 OPEN I Detecting switch for opening and closing of the upper cover. L : Close
15 CLOCK I CLOCK SET switch input.
16 NC — Not used (Open).
17 NC — Not used (Open).
18 T.MARK I T MARK (Track mark) switch input.
19 REC I REC switch input.
20 PROTECT I Disc write protect switch. H : Protect
21 HOLD I HOLD switch input (This unit). L : HOLD
22 SYNC REC I SYNCHRO REC switch input.
23 D. B. B I DIGITAL MEGA BASS slide switch input.
24 XLINEDET I LINE IN (OPTICAL) detection input. L : LINE IN
25 AVLS I AVLS switch input. L : LIMIT
26 XTEST I Test mode terminal. L : Test mode
27 XDCIN I Not used (Open). (DC input detect. L : DC IN)
28 KANA SE L I Model input. (L : J model, H : Tourist, Hong Kong model)
29 XPHOTO SW O ON/OFF control signal output of PHOTO circuit.
30 XP CONT O Power control output. L : ON
31 X2VCONT O Outputs H while operating with a lithium battery. 2V power control signal output. L : ON
32 XREC LED O REC LED control. L : ON
33 MODE2 O
REC drive (IC602) control signal output.
34 MODE1 O
35 XNIMH CHG O Battery charger control signal output. L : Charge
36 XLCD ON O LCD ON/OFF control. L : ON
37 –––– — Not used (Open).
38 MRST I Microprocessor reset input.
39 V — Ground.
SS
40 XTAL — System clock (12 MHz).
41 EXTAL — System clock (12 MHz).
42 LCD STBY O LCD communication strobe signal output to LCD driver.
43 NC — Not used.
44 LCD DATA O LCD data output.
45 LCD SCK O Serial clock output.
46 CHG MNT I Battery charge voltage minitor input.
47 INLS I Detecting switch for internal circuit of sleding. L : Internal circuit
48 HIDC MNT I Voltage monitor DC input.
49 KEYR I Remote control key input.
50 AV — Ground terminal for A/D converter.
SS
Pin Description
– 23 –
Pin No. Pin name I/O
51 AVREF I A/D converter reference voltage input.
52 AV — A/D converter power supply terminal.
DD
53 NC — Not used (Open).
54 TEMP I Temp meter (IC803) input.
55 KEY3 I Key input.
56 KEY4 I Key input.
57 KEY1 I Key input.
58 XINT REC SW I Recording head position detect input.
59 UNREG MNT I 2.8 V voltage monitor input.
60 2V MNT I Voltage monitor for lithium battery. Motor power voltage monitor input.
61 FG IN I FG input from motor driver (IC503).
62 NC — Not used (Open).
63 FOK I Focus OK signal input.
64 –––– — Not used (Open).
65 –––– — Not used (Open).
66 XJACKDET I LINE IN (OPTICAL) jack detection input.
67 OPT DET I LINE IN (OPTICAL) optical detection input.
68 XMIC DET I MIC (PLUG IN) jack detection.
69 –––– — Not used (Open).
70 –––– — Not used (Open).
71 SPOFF O
REC head motor control signal output.
72 RSI O
73 CHG CONT O Constant current chage control signal output.
74 –––– — Not used (Open).
75 DQSY I Subcode Q sync (SCOR) of digital in U-bit CD format from IC503.
76 T COUNT I Traverse count signal input.
77 SDI1 I Serial data input.
78 SDO1 O Serial data output.
79 SCK1 O Serial clock output.
80 SQSY I SUB-Q/ADIP SYNC input.
81 BEEP O BEEP sound output control.
82 XLAT O Latch output.
83 NC — Not used (Open).
84 TEX — Not used (Fixed at "L").
85 XT — Not used (Fixed at "L").
86 V — Ground.
SS
87 V — Power supply pin (+2.8V).
DD
88 NC — Not used (Fixed at "H").
89 XCS ADA O A/D, D/A converter chip select output.
90 XPD ADA O A/D, D/A converter power down signal output. H : Power down
91 KEYON O SLEEP : L, action : H.
92 XNIMH DET I Battery detect switch input.
93 A MUTE O Analog mute control. H : Mute
94 OPT CTL O Power supply control output for an optical input.
95 XCE REG — Not used (Open).
96 XCE NV O EEPROM chip select output.
97 SENS I SENS input.
98 LDON O "H" : APC circuit ON, "L" : APC circuit OFF
99 SHOCK I Track jump detection input from IC503.
100 GND SW O Ground switch output.
Pin Description
– 24 –