ADE3800XT 查看數據表（PDF） - STMicroelectronics

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ADE3800XT

Analog LCD Display Engine for XGA and SXGA Resolutions with Embedded LVDS and RSDS Transmitters

STMicroelectronics 

Scaler Equations

7 Scaler Equations

ADE3800

Dclk _ PR = FSYN _ PR _ OTCLK ⋅ (3 − NumPPC )

dest _ hpos = HPout − dest _ hpixel

2

WinTop = 10

WinLeft = max(48, HTout − min HBout − 8)

ScaleFactorH = HPin << 16

dest _ hpixel

fSclk = 140 MHz, and Sclk_PR = 18AF

dest _ vpos = VPout − dest _ vpixel

2

WinBot

=

⎧DE _ panels ⇒ 2,

⎩⎨WinTop + VPout −1,

_

otherwise

WinRight = WinLeft + HPout

ScaleFactorV = VPin << 16

dest _ vpixel

pipe _ rate = Sclk _ PR ⋅ ScaleFactorH

Dclk _ PR >> 2

origin _ hpos = −(((WinLeft + dest _ hpos) ⋅ 2 − 23) ⋅ ScaleFactorH + 24) >> 13

origin _ vpos = −(((WinTop + dest _ vpos) ⋅ 2 −1) ⋅ ScaleFactorV ) >> 13

LineStart

=

⎝⎛⎜⎜ (WinLeft

+ dest _ hpos)

<<

4−

(43 << 9) ⋅ Sclk _

Dclk _ PR

PR

−

1 << 21

ScaleFactorH

−136⎟⎟⎠⎞

>>

4

InitTrigDelay = (((HPin > 1024)?5 : 9) + SMUX _VTRIG << 2) ⋅ xclks _ per _ hsync −

SMEAS _ H _ NUM _ LINES << 2

((WinTop + dest _ vpos) ⋅ HTout ⋅ (Dclk _ PR >> 6)) >> 15

SCL_TRIGGER_DLY = InitTrigDelay;// wait 3 frames

wPtrMinPost = SCL_PTR_POST;

// feedback loop to tune trigger delay:

while ( !(8 < wPtrMinPost < 16) ) {// landing zone is (8, 16) & mid point is 12

wDiff = wPtrMinPost > (512 + 12) ? wPtrMinPost – (1024 + 12): wPtrMinPost - 12;

dwTriggerDelay = dwTriggerDelay + ((((xclk_freq / inclk_freq) * 3) * wDiff) / 2);

SCL_TRIGGER_DLY = max (dwTriggerDelay, 1);

// wait 2 frames for new trigger delay to take effect

wPtrMinPost = SCL_PTR_POST;

}

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