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Between the system controller and the EEP ROM, a traverse supplementary value and a focus bias, both obtainable in the
adjustment mode as already referred to, including such data as an offset value of focus/tracking gain, are transferred to and
stored in the EEP ROM synchronously with the clock output from Pin &¢ [NV CLK] of the system controller.
In the conventional model, moreover, the sound volume setting data and the address data relating to the stop position applied
in the resume function are held in the RAM located in the interior of the system controller normally powered. In the MZ-E30,
however, the power will stop being supplied to the system controller if the stop mode should last for about 10 second (which
varies with an optical block position and/or with a mode) for the purpose of saving the energy. These data, therefore, are stored
in the EEP ROM similarly to the servo system data so that they will be read out onto the system controller upon startup and
transferred to each circuit.
Between the system controller and the remote commander, on the other hand, such display information as characters, etc.
are transmitted by way of the remote jack (J301) to the LCD controller located inside the remote commander. Such
information, moreover, is transmitted from the controller inside the remote commander to the system controller since the
receiving data differ in transmission rate, etc. by type of remote control.
To transmit data, the clock timed with such data is also transmitted normally at a time. In the MZ-E30, however, clock
information, etc. are previously transmitted, based on which the controller in the interior of remote control has a function of
generating a clock. Only a single line for data, therefore, permits them to be received.
SBUS Data Transmission Timing
(1) Writing in DSP/digital servo or RF Amplifier from System Controller
To write in the DSP/digital servo or RF amplifier, each bit data are input synchronously with the falling edge of a serial
clock (SCK) as shown in Fig. 4-3.. As shown in the figure, the first three bits relate to the control, with Bit 1 "ST" standing
the for start bit, and Bit 2 "R/W" for the Read or Write mode.
Three types of information, command, address and data, are transferred from the system controller to the DSP/digital servo.
To identify them, Bit 3 "D/C" should be used.
Commands and data, moreover, have a configuration as shown in Fig. 4-4.. When the code of a device coincides with that
of a DSP/digital servo or of an RF amplifier, the device under the same code will receive the related command, thereby
performing subsequent data communications. The instruction code, meanwhile, is used to transfer a command, such as to reset
the hardware.
Fig. 4-3. Timing of Writing in DSP/digital servo or RF Amplifier from System Controller
Fig. 4-4. Command and Data Configurations
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