
June 1997
149
ADVANCE DATA BOOK v2.0
THE VIDEO SOUND AND PROGRAMMER’S MODEL
CL-PS7500FE
System-on-a-Chip for Internet Appliance
16.20 Vertical Display End Register (VDER): Address 0x94
This 13-bit register defines the time, in units of a raster, from the start of the VSYNC pulse to the end of
the video display. (that is, the first raster where the display is notpresent). If N rasters are required in this
time, then program the value (N
1) into the VDER.
16.21 Vertical Border End Register (VBER): Address 0x95
This 13-bit register defines the time, in units of a raster, from the start of the VSYNC pulse to the end of
the
border display (that is, the first raster where the
border is not present). If N rasters are required in this
time, then program the value (N
1) into the VBER. If no
border is required, then this register must be
programmed to the same value as the VDER.
16.22 Vertical Cursor Start Register (VCSR): Address 0x96
This is a 15-bit register. The lower 13 bits define the time, in units of a raster, from the start of the VSYNC
pulse to the start of the cursor display. If N rasters are required in this time, then program the value (N
1) into the VCSR. The upper 2 bits control the display of the cursor in duplex LCD mode. Program these
bits to ‘0’ in all other modes.
When the upper 2 bits are programmed to ‘11’ (split screen) the meaning of VCSR and VCER are altered
as follows: The cursor is displayed in the lower half-screen only from the value of VDSR to the value of
VCSR, and again in the upper half-screen only from the value of VCER to the value of VDER. This allows
a cursor to be positioned across the boundary of the upper and lower half-screens of an LCD.
0 0
0
3
4
7
8
11
12
15
16
19
20
21
22
27
28
31
1
2
5
6
9
10
13
14
17
18
23
24
25
26
29
30
X X X X X X X
VDER value
0
1
X X X X X
X
0 0
1
1
0 0
0
3
4
7
8
11
12
15
16
19
20
21
22
27
28
31
1
2
5
6
9
10
13
14
17
18
23
24
25
26
29
30
X X X X X X X
VBER value
0
1
X X X X X
X
0
1
1
1
0 0
0
3
4
7
8
11
12
15
16
19
20
21
22
27
28
31
1
2
5
6
9
10
13
14
17
18
23
24
25
26
29
30
X X X X X X X
VCSR value
0
1
X X X X X
X
0
1
1 1
X X
00 normal operation
01 upper half-screen only
10 lower half-screen only
11 split screen