AL440B

AL440B

November 28, 2001

17

AL440B Write Window(3)

WSTART

WSTART+1xWSTRIDE

WXSIZE

WYSIZE

Memory Area

WSTART+2xWSTRIDE

WSTART+(WYSIZE-1)x WSTRIDE

WSTART-XSIZE+1

Go

back

to

WSTART

Write Window Area

X-mirror & Y-mirror

Write Window:

WWCTRL[6]: 1

X-mirror

WSTRIDE: negative numer

Y-mirror

11.8 Window Read Register Programming

The operations of Window Read function are same as Window Write. The operation of Window

Read is operated independently from Window Write. The Window Read related registers are listed as

follows:

RSTART_L and RSTART_H define the widow data read starting address.

Addr

Name

Bit7

Bit6

Bit5

Bit4

Bit3

Bit2

Bit1

Bit0

0Bh

RSTART_L

[7]

[6]

[5]

[4]

[3]

[2]

[1]

[0]

0Ch

RSTART_H

0

0

0

[12]

[11]

[10]

[9]

[8]

RSTART (Read Start address) <= RSTART_H[4:0] & RSTART_L ;

RSTART range is from 0 to 8191 (block).

RXSIZE_L and RXSIZE_H define the window data read horizontal size.

Addr

Name

Bit7

Bit6

Bit5

Bit4

Bit3

Bit2

Bit1

Bit0

0Dh

RXSIZE_L

[7]

[6]

[5]

[4]

[3]

[2]

[1]

[0]

0Eh

RXSIZE_H

0

0

0

0

0

0

[9]

[8]

RXSIZE (Read X Size) <= RXSIZE_H[2:0] & RXSIZE_L ;

WXSIZE range is from 0 to 1023 (block).

RXSTRIDE_L and RXSTRIDE_H define the window data write horizontal width.

Addr

Name

Bit7

Bit6

Bit5

Bit4

Bit3

Bit2

Bit1

Bit0

0Fh

RSTRIDE_L

[7]

[6]

[5]

[4]

[3]

[2]

[1]

[0]

10h

RSTRIDE_H

0

0

0

0

[11]

[10]

[9]

[8]

RSTRIDE (Read Stride) <= RSTRIDE_H[3:0] & RSTRIDE _L ;

RSTRIDE range is from 0 to +4095 (block).