Bus Line Of 8-Bit Signals - Canon A-1 Repair Manual

50
T B 0 TB 1
Rank
OFF_--,
TB2 TB3
u
I
1
TB4 TB5
TB6 TB7
I
8
I
1 6
Word
ON~ " 'IEE-------_
2 4 0
1'''.
---------'"i~1
Fig. 15 Bus Line of a-bit Signals
The A-I processes more signals through several lines.
An example is shown in Fig. 16.
Word 1 carries signals of various input digital
information and Word 2 carries brightness value (BV)
digital i n formation which has been converted from
analog in f ormation. Word 1 is being transmitted most
of the time but the Wo r d 2 is sent in turn immediately
after the interruption by t h e signal of ADCE (AD ConverteI
End) takes place at the end of transmission of the
Word 1 every 20 milliseconds.