Hitachi VK-S274 Service Manual page 46

Pin I/O Active Abbreviation
No. Level
50 I 0V-3V V-GYRO
51 I 0V-3V H-GYRO
52 I 0V-3V FDET
53 ----- ----- AVCC
54 ----- ----- AVCC
55 ----- ----- VCC
56 ----- ----- VCC
57 ----- ----- ----------
58 ----- ----- ----------
59 I Lo SYS-REST
60 ----- ----- VCC
61 ----- ----- STBY
62 ----- ----- VCC
63 ----- ----- ----------
64 ----- ----- GND
65 I (Pulse) SYS-CLK
66 I Lo FWE
67 I Hi MD2
68 ----- ----- ----------
69 O Hi HALL-G
70 ----- ----- ----------
71 ----- ----- ----------
72 I (Pulse) HD
73 ----- ----- SHUT-CTL
74 ----- ----- STROBE
75 I (Pulse) FP
76 O (Pulse) SD (232C)
77 I (Pulse) RD (232C)
78 I (Pulse) EP3
79 ----- ----- ----------
80 ----- ----- ----------
81 ----- ----- ----------
82 ----- ----- ----------
83 O (Pulse) SDO
84 I (Pulse) SDI
85 O (Pulse) SCLK
86 ----- ----- DC-LIGHT-SW- Not used. Open.
OFF
87 ----- ----- ----------
88 I Hi 4800SET
89 O ----- LIGHT-SW
90 I Hi/Lo COLOR-BW
91 ----- ----- ----------
92 I Hi/Lo F-DIAL1
93 I Hi/Lo F-DIAL2
94 O Hi/Lo LIGHT-O
95 O Hi/Lo NTPL
96 O (Pulse) CLK-CDS
97 O (Pulse) SDO-CDS
98 O (Pulse) CS-CDS
99 O (Pulse) CS-EE
100 O (Pulse) CS-EENT
6 - 13
Function
Not used. Connect to ground.
F-value detection input. Receives the F.DET voltage detected by IC1351 (F.DET/
IRIS DRIVE) and compares this with the reference voltage input via pin 53 to detect
the F-value.
Reference 3V power input.
A/D reference voltage input (connected to 3V power supply).
3V power input.
Not used. Open.
Not used. Connect to ground.
Reset signal input from IC1203 (RESET PULSE GEN.).
3V power input.
Not used. Connect to 3V power supply.
3V power input.
Not used. Open.
Grounded.
Inputs control clock pulses from IC1121 (CAMERA DSP).
Not used.
Not used. Open.
Controls the amplification (gain of Hall device) of IC1351 (F.DET/IRIS DRIVE).
Not used. Open.
Inputs horizontal sync from IC1121 (CAMERA DSP).
Not used. Open.
Inputs field discrimination pulse from IC1121 (CAMERA DSP).
Used for initial settings and adjustment. For data communications with personal
computer.
Receives pulses which discriminate the iris detection area.
Not used. Open.
For data communications with IC1121 (CAMERA DSP), IC1202 (EEPROM).
Not used.
Not used. Open.
Color model and B/W model select input. (Hi: Color model/Lo: B/W model)
Not used. Open.
Transfer data to IC1101 (CDS/AGC & A/D CONV. ).
Activates data communications with IC1101 (CDS/AGC & A/D CONV. ).
Activates data communications with IC1202 (EEPROM).
Not used. Open.