Cirrus-logic AN269 Manual do Utilizador descarregar pdf (Página 8)

8 AN269REV1

AN269

The Calculations for HClkStrt are

HClkStrt = HClkstotal - Offset of HClk

= 19 - 6

= 13

The Calculations for HClkStop are

HClkStop = HClksTotal - Screen Width + Offset of HClk

= 19 - 16 - 6

= -3

Since -3 is not in the range of 0 and HClksTotal, add the number of Horizontal Clocks.

= -3 + Number of Horizontal Clocks

= -3 + 20

HClkStop = 17

The values for HSyncStart, HSyncStop, HActiveStrt, HActiveStop, HBlankStrt, HBlankStop, HClkStrt and

HClkStop are shown in Figure 2.

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Cirrus-logic AN269 Manual do Utilizador Página 8