NT68520XF Datasheet, PDF (78/97 Pages) List of Unclassifed Manufacturers – XGA,SXGA Flat Panel Monitor Controller

NT68520X,E
Miscellaneous
DA: Syncprocessor Free Run Horizontal Divider - Low Byte (R/W)
Bits Name
Description
D7-0 DCNT
[7:0]
Written Content of Dot Divider for Horizontal free running:
①Bit Number = 9 Bits
②Dot Clock = 12MHz
③Valid Range = 48 ~ 511
If out of this valid range, the reset default values will be loaded into DCNT
& LCNT to protect the following circuit.
④Horizontal Frequency of the free running is
Hfreq(free) = 12MHz / DCNT
Default: 0111 1100B
(ex)
If 100KHz free-run horizontal frequency is required , then the following
divider content will be set.
DCNT = 12MHz / 100KHz =120(dec) = 78(hex)
DB: Syncprocessor Free Run Horizontal Divider - High Byte (R/W)
Bits Name
D7-1
D0 DCNT[8]
Description
Reserved
MSB of Free Run Horizontal Divider (double buffer)
Default: XXXX XXX1B
DC: Syncprocessor Free Run Vertical Divider - Low Byte (R/W)
Bits Name
Description
D7-0 LCNT
[7:0]
Written Content of Line Divider for Vertical free running:
①Bit Number = 11 Bits
②Line Clock = Hfreq(free)
③Valid Range = 100 ~ 2047
If out of this valid range, the reset default values will be loaded into DCNT
& LCNT to protect the following circuit.
④Vertical Frequency of the free running is
Vfreq(free) = Hfreq(free)/LCNT = (12MHz / DCNT) / LCNT
Default: 0000 1101B
(ex) if 100Hz free-run vertical frequency is required wanted at
Hfreq(free)=100KHz condition, then the following Line divider
content will be set
LCNT = 100KHz / 100Hz =1000(dec) = 3E8(hex)
DD: Syncprocessor Free Run Vertical Divider - High Byte (R/W)
Bits Name
D7-3
D2-0 LCNT[10:8]
Description
Reserved
MSB of Free Run Vertical Divider (double buffer)
2003/4/15
78
Ver.1.0