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6.6.
LTC/VITC READER CIRCUIT DESCRIPTION
TECHNICAL DESCRIPTION
VIDEO IN
EV-COM
Inter-module
serial comm.
Figure 6-11: 611 Module Block Diagram
The 611 reader is a microcontroller based module functionally divided into
the following hardware subsystems:
1.
Microcontroller & I/O
2.
High speed LTC Reader
3.
Sync Separator/Video processing
4.
High speed VITC Reader
The microcontroller, LTC reader, and video processing circuits are
contained on the main circuit card (6110). The VITC reader circuitry is
optional and is contained on a separate sub-module (6111) which plugs
into the main module. Input buffers and all input/output connectors are
contained on a separate I/O module, (7006) to which the 611 module plugs
in.
The relevant schematic drawings are shown in brackets for each
section of the circuit.
6.6.1. Microcontroller (6110-30)
At the heart of the 611 reader module is an 8032 microcontroller, (MCU)
U24. Its three 8 bit bi-directional ports and 8 bit bus provide peripheral
interfacing to the rest of the circuits. Program memory is contained on
EPROM U23.
The EPROM is divided into two halves, with the upper
addressing for the PAL video standard, and the lower addressing for the
NTSC video standard. The correct half of the EPROM is selected by pin
26 of the MCU. Scratch pad and data RAM are provided internally by the
MCU.
An onboard oscillator, also part of the MCU, is crystal controlled.
11.50849 MHz frequency is internally divided by 12, resulting in a
processor operating frequency of approximately 960 Khz.
Model 4025 Film Footage Encoder Manual
I/O opt.
LTC READER
VITC READER (opt.)
LTC IN
Its'
Page 6-19
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