m35055-001fp Renesas Electronics Corporation., m35055-001fp Datasheet - Page 17

• Manufacturer Part Number: m35055-001fp
• Description: Screen Character And Pattern Display Controllers
• Manufacturer: Renesas Electronics Corporation.

Supplemental explanation about display control register
(1) How to effect synchronous separation from composite video signals
16
Fig. 5 The method of synchronous separation from composite video signal.
Synchronous separation is effected as follows depending on the width of L-level of the vertical synchronous period.
The determination is made at the timing indicated by V in Fig.4 either in case 2 or in case 3.
1. Less than 8.4 µ s ······ Not to be determined to be a vertical synchronous signal.
2. Equal to or higher than 8.4 µ s but less than 15.6 µ s ······ When two clocks continue, if take place, it is “L” period is determined to be a
3. Equal to or higher than 15.6 µ s ······ It is “L” period is determined to be a vertical synchronous signal with no condition.
Composite video signal
vertical synchronization signal.
Vertical synchronous signal
Equalizing pulse
8.4 s
15.6 s
Sequence of synchronizing pulse
SCREEN CHARACTER and PATTERN DISPLAY CONTROLLERS
M35054-XXXFP/M35055-XXXFP
8.4 s
MITSUBISHI MICROCOMPUTERS
V