m35052 Renesas Electronics Corporation., m35052 Datasheet - Page 17

• Manufacturer Part Number: m35052
• 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. 4 The method of synchronous separation from composite video signal.
(2) Field definition
Fig. 5 Field definition
S e c o n d f i e l d
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.3 either in case 2 or in case 3.
F i r s t f i e l d
1. Less than 8.4 ˚s ······ Not to be determined to be a vertical synchronous signal.
2. Equal to or higher than 8.4 ˚ s but less than 15.6 ˚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 ˚ s ······ It is “L” period is determined to be a vertical synchronous signal with no condition.
C o m p o s i t e v i d e o s i g n a l
vertical synchronization signal.
V e r t i c a l s y n c h r o n o u s s i g n a l
E q u a l i z i n g p u l s e
1 H
1 / 2 H
1
1 '
2
2 '
3
3 '
4
4 '
8 . 4 s
1 5 . 6 s
A horizontal scanning line number corresponds to slice lines DVP4 through
5
5 '
DVP0 (address F1
S e q u e n c e o f s y n c h r o n i z i n g p u l s e
SCREEN CHARACTER and PATTERN DISPLAY CONTROLLERS
6
6 '
stands for either an equalizing pulse or sequence of synchronizing
pulse to be used as a trigger of a receiving set. H stands for a hori-
zontal scanning period.
7
7 '
8 . 4 s
16
8
8 '
) and to encode lines EVP4 through EVP0 (address F2
9
9 '
1 / 2 H
1 H
1 0
MITSUBISHI MICROCOMPUTERS
1 0 '
1 1
M35052-XXXSP/FP
V
P u l s e s d u r i n g a v e r t i c a l
r e t r a c e l i n e e r a s u r e p e r i o d
8 – 1 2 H
16
).