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ZR36016

INTEGRATED COLOR SPACE / RASTER-TO-BLOCK CONVERTER

Zoran Corporation 

Integrated Color Space / Raster-To-Block Converter

Non-continuous I/O Using PXEN

The pixel buses PXIN/PXOUT enter a freeze state when PXEN

is not active. VIN and HIN must be used in a consistent manner

as illustrated in Figures 10 and 11 when PXEN is used. VOUT,

HOUT, PXOUT, WINDOW and FBSY are also affected by the

freeze state but the ZR36050 interface and the strip buffer bus

are always active, regardless of PXEN.

To stop bus activity by entering the freeze state, PXEN must be

not active for at least one PXCLK cycle, or when PXCLK =

SYSCLK then it must be inactive for at least two PXCLK cycles.

Proper operation is illustrated in the figures below for the various

clock ratios.

SYSCLK

PXCLK

PXEN

PXIN

PXOUT

SYSCLK

PXCLK

PXEN

PXIN

PXOUT

SYSCLK

PXCLK

PXEN

PXIN

PXOUT

X

X

Figure 6. PXCLK = SYSCLK/2

X

Figure 7. PXCLK = SYSCLK/4

Figure 8. PXCLK = SYSCLK

12

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