CL-PS7500FE
System-on-a-Chip for Internet Appliance
16.20 Vertical Display End Register (VDER): Address 0x94
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10
9
8
7
6
5
4
3
2
1
0
1 0 0 1
0 1 0 0
X X X X X X X X X X X X X
VDER value
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 not present). 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
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10
9
8
7
6
5
4
3
2
1
0
1 0 0 1
0 1 0 1
X X X X X X X X X X X X X
VBER value
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
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10
9
8
7
6
5
4
3
2
1
0
1 0 0 1
0 1 1 0
X X
X X X X X X X X X X X X X
VCSR value
00 normal operation
01 upper half-screen only
10 lower half-screen only
11 split screen
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.
June 1997
149
ADVANCE DATA BOOK v2.0
THE VIDEO SOUND AND PROGRAMMER’S MODEL
CIRRUS [ CIRRUS LOGIC ]
