Sony MZ-E30, Service Manual

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Fig. 4-2. Outline of Microprocessor Interface
The MZ-E30 has a microprocessor interface outlined in Fig. 4-2.. As shown in the figure, the system controller (IC801) is
employed as the mainstay to control the system as a whole. Besides, the DSP/digital servo (IC601) and the EEP ROM (IC802)
are provided. Commands and data are, moreover, bilaterally given and taken to and from the remote commander. In addition,
data are unilaterally transmitted to the RF amplifier. Communications with the DSP/digital servo and RF amplifier, meanwhile,
are performed by way of a serial bus (SBUS). Given and taken between system controller and DSP/digital servo mainly as
described below, furthermore, are those serial data and serial commands which will be input and output to and from Pin
#∞
(SBUS DATA) as timed with the serial clock output from Pin
#¢
[SBUS CLK].
System Controller
n
DSP/digital servo (WRITE mode)
• Various function data in each digital servo (DSSP) and
• SERVO- and PLL-mode setting data, and electronic volume setting data
DSP/digital servo n System Controller (READ mode)
• Error data in each servo and
• SubQ/ADIP cluster and sector information
From the system controller to the RF amplifier, SBUS data are transferred similarly to the case of DSP/digital servo. And
the clock line is used to set a gain in the I-V converter amplifier and ADIP extractor circuits located inside the RF amplifier,
to adjust the balance of focus and tracking amplifiers, to amplify the RF, with pit or MO played back, and to select the servo
amplifier polarity.
4-1. Microprocessor Interface
DO
DI
NVDI
NVDO
SK
CS
SSB I/F
22
IC501 RF AMP
SSB I/F
32
31
33
27
SBUS
CLK
SINT
DSP SINT
35
34
SBUS DATA
SBUS CLK
21
SBUS
SCK
RMC DTCLK
IC801
SYSTEM CONTROLLER
72
73
74
75
NVCLK
NVCS
2
4
IC802 EEPROM
IC601 DSP/DIGITAL SERVO
SBUS CLOCK
SBUS DATA
1
3
62
REMOTE CONTROLLER
UNIT
RM-MZE50
LCD CONTROLLER
J301
4
3
2
1