CL-PS7500FE 데이터 시트보기 (PDF) - Cirrus Logic

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CL-PS7500FE

System-on-a Chip for Internet Appliance

Cirrus Logic 

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

1001 0100

XXXXXXXXXXXXX

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

1001 0101

XXXXXXXXXXXXX

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

1001 0110

XX 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

ADVANCE DATA BOOK v2.0

THE VIDEO SOUND AND PROGRAMMER’S MODEL

149

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