AL300 datasheet(41/64 Pages) ETC

41 / 64 page

AL300

November 28, 2001

1: enable Input Divider 2. Output clock frequency is divided by 2 when

the Input Divider is turned on.

PllDivH (10:8)

<2:0>

Bits 8~10 of the PLL divider

The value of PLLDIV is determined by subtracting from the actual target divider by 2 when internal

PLL is used. For example, if the desired divider value is 840, then the value set to the related

registers should be 838 = 346h. Therefore, PllDivH[2:0] should be set to 3h (“011”) and

PllDivL[7:0] should be set to 46h (“01000110”).

However, when an external genlock PLL such as ICS9173 is used, programming registers 10h and

11h is still needed. In such applications, the PLLDIV should be the actual target divider instead of

being subtracted by 2 as in the above case.

Please review the AL300Programming algorithm for more details.

12h:

PLL Reference Divider Low (R/W) [PLLREFDIV]

PllRefDivL

<7:0> Bits <7:0> of display PLL reference input divider number (Unit: 1 pixel)

13h:

PLL Reference Divider High (R/W) [PLLREFDIV]

PllRefDivH

<2:0> Bits <10:8> of display PLL reference input divider number

Registers 14h~17h are used to define the independent horizontal and vertical scaling ratio.

14h:

Horizontal Zoom Ratio Low (R/W) [HRATIO]

HRatioL

<7:0> Bits <7:0> of horizontal scale ratio

Value valid only when register 03h<5> = 0.

15h:

Horizontal Zoom Ratio High (R/W) [HRATIO]

HRatioH

<2:0> Bits <10:8> of horizontal scale ratio

Value valid only when register 03h<5> = 0.

Horizontal Zoom Ratio = (HDST x 256) / HSRC

HSRC = Horizontal source capture size (register 22h)

HDST = Horizontal destination active width (registers 33h and 34h)

16h:

Vertical Zoom Ratio Low (R/W) [VRATIO]

VRatioL

<7:0> Bits <7:0> of vertical scale ratio

Value valid only when register 03h<5> = 0.

17h:

Vertical Zoom Ratio High (R/W) [VRATIO]

VRatioH

<6:0> Bits <14:8> of vertical scale ratio

Value valid only when register 03h<5> = 0.

Vertical Zoom Ratio = (VDST x 4096) / VSRC

AL300 Datasheet(PDF) 41 Page - List of Unclassifed Manufacturers

AL300 Datasheet(HTML) 41 Page - List of Unclassifed Manufacturers

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64

Datasheet Download

Link URL