STV9410 View Datasheet(PDF) - STMicroelectronics
Part Name
Description
MFG CO.
'STV9410' PDF : 25 Pages View PDF
STV9410
4. DISPLAY CONTROL
4.1 SCREEN DESCRIPTION
A screen is composed of successive scan lines
gathered in one or several strips. Each strip is
defined by a descriptor stored in memory. A list of
descriptors allows screen composition, different
screens can be defined in memory (see application
note and Figures 13, 14.).
Two kinds of strip are available :
- Uniform color strip
Applications :
- vertical front and back porch
- vertical synchro
- border lines
Parameters :
- number of scan lines
- color
- Character strip
Characters and attributes are defined by a suc-
cession of codes stored in memory; thanks to the
character code, a memory address is calculated
and used to get the character pattern.
Parameters :
- address of the first code
- size, display enable
Figure 13 : Programmation of Number of Scan Lines - Vertical Register VERT (2FF0/2FF1)
and Descriptor List
DESCRIPTOR LIST 1460 0A02 F8AA 20AB 48AB
CONTENTS
U0* U1 R0* R1 R2
A8AA D0BA 1402 1906 1903 1907
R18 R19 U2 U3 U4 U5
SCAN LINES
SUM
20 10 10 10 10
20 30 40 50 60
10 10 20 25 25 25
220 230 250 275 300 325
VERT REGISTER 242 Scan Lines (00F0h)
COMMENTS
U2 Strip is cut (red uniform strip)
VERT REGISTER 312 Scan Lines (0136h)
COMMENTS
U2 (red), U3 (yellow), U4 (cyan) and part of U5 (white) uniform strip are displayed
* U0 is uniform strip number 0, R0 is character strip number 0
Figure 14 : Relation between Screen Location/Descriptor Pointer/RAM Page Codes
OTHER
25th ROW CODES
OTHER
1st ROW CODES
3rd ROW CODES
2nd ROW CODES
OTHER
23th ROW CODES
OTHER
Address ADDR
of the list REGISTER
* Identical to row 2
UNIF 0
TOP UNIFORM STRIP
ROW 0
1st CHARACTER ROW
ROW 1
2nd CHARACTER ROW
ROW 2
3rd CHARACTER ROW
ROW 22
ROW 2
ROW 24
UNIF 1
23th CHARACTER ROW
24th CHARACTER ROW *
25th CHARACTER ROW
BOTTOM UNIFORM STRIP
RAM
PAGE CODES LOCATION
RAM
DESCRIPTOR LIST
SCREEN
18/25
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