Hitachi VK-S454R Service Manual page 18

Description of Operation > Microprocessor Pin Function Table
Pin
Abbreviation
I/O
No.
37 RD-PWMA O
38 FV I
39 FCUS-SEN I
40 ----- -----
41 ZOM-SEN I
42 GND -----
43 HAL-ADJ1 O
44 HAL-ADJ0 O
45 BATTERY I
46 ZOOM-SW I
47 FOCUS-SW I
48 +B-DET I
49 TEMP-ADJ I
50 V-GYRO I
51 H-GYRO I
52 FDET I
53 AVCC -----
54 AVCC -----
55 VCC -----
56 VCC -----
57 ----- -----
58 ----- -----
59 RESET-IN I
60 VCC -----
61 STBY -----
62 VCC -----
63 ----- -----
64 GND3 -----
65 SYS-CLK I
66 FWE -----
67 MD2 -----
68 ----- -----
69 HALL-G O
70 ----- -----
71 ----- -----
72 HD I
73 ----- -----
74 ----- -----
75 FP I
76 SD(232C) O
77 RD(232C) I
Active
Level
----- Not used. Open.
(Pulse) Receives the vertical sync pulses that detect the iris detection area,
from IC1121 (CAMERA DSP).
(Pulse) Focus motor position detection input.
----- Not used. Open.
(Pulse) Zoom motor position detection input.
----- Ground.
0V-3V Controls the offset voltage of IC1351 (F.DET/IRIS DRIVE).
0V-3V Drives bias generator in IC1351 (F.DET/IRIS DRIVE) via Q1351
(BIAS DRIVE) to control the bias voltage of the Hall devices.
0V-5V Not used. Connected to 3V line and ground via resistors.
0V-3V Not used. Connected to 3V line and ground via resistors and capacitor.
0V-3V
0V-3V Power voltage (+B) detection input. Monitors the +B line voltage.
0V-3V Temperature change detection input. Detects variations in the
forward voltage at the connected diode to correct the back-focus.
0V-3V Not used. Connect to ground.
0V-3V
0V-3V 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.
Lo Reset signal input from IC1251 (RESET PULSE GEN.).
----- 3V power input.
----- Not used. Connect to 3V power supply.
----- 3V power input.
----- Not used. Open.
----- Grounded.
----- Inputs control pulses from IC1211 (CAMERA DSP).
----- Not used. Connected to ground via resistors.
----- Not used. Connected to 3V line via resistors.
----- Not used. Open.
Hi Controls the amplification (gain of Hall device) of IC1351 (F.DET/IRIS
DRIVE).
----- Not used. Open.
-----
(Pulse) Inputs horizontal sync from IC1121 (CAMERA DSP).
----- Not used. Open.
-----
(Pulse) Inputs field discrimination pulse from IC1121 (CAMERA DSP).
(Pulse) Used for initial settings and adjustment. For data communications
(Pulse) with personal computer.
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Function