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4. Lens drive block
4-1. Zoom drive
Drive settings are made by means of the serial data signals
(L_STR, L_SCLK and L_SDATA) and data signal (ZIN) which
are output by the ASIC (IC101). The motor drive signals
(ZOUT+, and ZOUT-) are output in accordance with the set-
tings from the motor driver IC (IC951) to drive the zoom DC
motor.
Detection of the standard zooming positions is carried out by
means of signal (ZPROUT) from the photoreflector by ASIC
(IC101) is detecting inside the lens block. Also, getting of the
zooming positions is carried out by the ASIC (IC101) count-
ing the photointerruptor (ZPIOUT).
4-2. Focus drive
Drive settings are made by means of the serial data signals
(L_STR, L_SCLK and L_SDATA) and data signal (F_CLK)
which are output by the ASIC (IC101). The motor drive sig-
nals (FOUT_A+, FOUT_ A-, FOUT_B+ and FOUT_B-) are
output in accordance with the settings from the motor driver
IC (IC951) to drive the focus stepping motor.
Detection of the standard focusing positions is carried out by
the ASIC (IC101) detecting the signal (FPIOUT) from the
photointerruptor inside the lens block.
4-3. Iris drive
Drive settings are made by means of the serial data signals
(L_STR, L_SCLK and L_SDATA) and data signal (IIN) which
are output by the ASIC (IC101). The motor drive signals
(IOUT+ and IOUT-) are output in accordance with the set-
tings from the motor driver IC (IC951) to drive constant the
moving coil motor for iris.
4-4. Shutter drive
Drive settings are made by means of the serial data signals
(L_STR, L_SCLK and L_SDATA) and data signal (IIN) which
are output by the ASIC (IC101). The shutter drive signals
(SOUT+ and SOUT-) are output in accordance with the set-
tings from the motor driver IC (IC951) to drive constant the
moving coil motor for shutter, and then mecha shutter is
opened and closed.
– 6 –
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