Hitachi VIV-E553LE - Page 101

Active
Level
(Pulse)
Abbreviation
ACTIVE
Hi LIGHT-ON Light power contro! output. Outputs "Hi" when power is turned on.
Not used. Open.
CLK-CDS
SDO-CDS
Transfer data to 1C1101 (CDS/AGC & A/D CONV. ).
(Pulse) CS-CDS
100 (Pulse) |CS-SYS
Activates data communications with 1C1101 (CDS/AGC & A/D CONV. ).
Activates data communications with IC1105 (EEP-ROM).
Activates data communications with IC901 (S-yP).
2. System Control Microprocessor (IC901: S-yP)
Active
Level
Abbreviation Function
CH2. REC[Lo]
Output the signals to select the video heads for recording.
CH1. REC[Lo
SW30/Lo
Go "Lo" in the corresponding channel period during recording.
Antiphase head switching pulse output.
SW30(SW25
TEST/NORjLo
ADP DET
PRE-V
EJECT SWILo]
Head switching pulse output.
Test program start detection input. A test program is executed when "Hi" is input.
Not used. Open.
AC adapter connection detection input.
Not used.
Battery attachment detection input.
Mechanism state switch position (mode) detection input.
Power switch detection input. "Lo" is input during
ing (cal ;
Power switch detection input. "Lo" is input during playback (VCR mode).
Eject switch detection input. When "Lo” is input, the camera/recorder performs the
eject operation even when the power is turned off (standby release input).
STAGE[Lo]
Cassette holder open/close detection input. "Lo" is input when the cassette holder
Is closed.
ME/MP[Lo]
WAKE UP{Lo]
Input to discriminate the type of tape.
Hi: ME (metal evaporated) tape, Lo: MP (metal particle) tape.
Standby release input. When the camera power is turned on, "Lo" is input to
release the standby mode. IC901 detects the inputs of each switch to start
operation.
REC START{Lo}]| Recording start/stop switch detection input.
AV CONT
CHARGE CONT
INIT CHARGE
CHARGE LED
CHG-PROT
MUTE
CAM[LoJ/LINE
Input to detect whether an external AV signal is input or not. "Lo" is input when an
AV input cable is connected to the AV input/output connector (JK200: AV JACK).
Controls 1C553 (AF5V GEN.) to generate autofocus power supply (AF) 5V and
charge circuit power supply (CHARGE) 5V.
Charge mode control output. Outputs "Hi" when the voltage of the attached battery is
5.8V or less, to set the camcorder to the initial charge mode.
Outputs "Hi" during charging to control Q914 (CHG LED SW) so that the CHARGE
LED (LED9071) lights.
Not used.
Audio muting output. Outputs "Hi" to mute sound.
Video processor mode control output. Outputs "Lo" during camera recording and ©
"Hi" with an external (line) signal.
END LED
End LED drive output. Outputs pulses of approx. 50Hz when power Is turned on.
VCR ON
Power control output. Outputs "Hi" when power is turned on.
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