STV5730 ST Microelectronics, STV5730 Datasheet - Page 8

• Manufacturer Part Number: STV5730
• Description: MULTISTANDARD ON-SCREEN DISPLAY FOR VCR
• Manufacturer: ST Microelectronics

STV5730
1.3 - Row Attributes
There are 11 row attributes, numbered from 0 to 10. They may be written one by one or sequentially.
The row attribute format is as follows :
VPOS OFFSET : the MSB is the sign bit (0 : positive, 1 : negative). If the offset is positive (from 0 to +17),
FBE
RE
HPOS OFFSET : The display of the row is shifted to the right by the corresponding number of pixels (from
1.4 - The Control Registers
There are 5 registers for microprocessor control. They can be written individually or sequentially :
- the ZOOM register
- the COLOR register
- the CONTROL register
- the POSITION register
- the MODE register
1.4.1 - Zoom Register
HZt[1:0] : Top row horizontal zoom factor (ie row 0)
VZt[1:0] : Top row vertical zoom factor
HZm[1:0] : Same as HZt[1:0], for middle rows (ie rows 1 to 9)
VZm[1:0] : Same as VZt[1:0], for middle rows
HZb[1:0] : Same as HZt[1:0], for bottom row (ie row 10)
VZb[1:0] : Same as VZt[1:0], for bottom row
The output of this register is synchronized by the horizontal synchronism. The RESET message clears this
register.
8/19
VZb1
11
11
HPOS OFFSET
VZb0
10
HZt[1:0] = 00
VZt[1:0] = 00
: FBE=0 : the characters are displayed without border
: RE=0 :
HZb1
then the corresponding number of lines are added on top of the row (i.e. it moves
downwards). These extra lines are colored according to the character background
rules. If the offset is negative (from -1 to -17), then the corresponding number of lines
are subtracted from the display of the row.
FBE=1 : the characters are displayed with border
RE=1 :
0 to 15).
9
01
10
11
01
10
11
HZb0
the characters of the row are not displayed.
They are replaced by the page background color.
the characters of the row are displayed.
:
:
:
:
:
:
:
:
8
8
1 pixel per character dot
2 pixels per character dot
3 pixels per character dot
4 pixels per character dot
1 pixel per character line
2 pixels per character line
3 pixels per character line
4 pixels per character line
address : 12
VZm1
RE
7
7
13
14
15
16
VZm0
FBE
6
6
HZm1
5
5
HZm0
4
VPOS OFFSET
VZt1
3
VZt0
2
HZt1
1
HZt0
0
0