ARM AMBA NIC-301 Spezifikationen PDF herunterladen (Seite 173)

HDLCD controller

ID062813 Non-Confidential

Figure B-22 Big endian byte layout

Figure B-23 shows the bit assignments for the big endian format.

Figure B-23 Pixel Format Register bit assignments

Table B-22 shows the bit assignments for the big endian format.

Color Select Registers

The RED_SELECT, GREEN_SELECT and BLUE_SELECT Registers characteristics are:

Purpose The bytes extracted from the internal buffer are presented as a 32-bit

value. These registers select how many bits, and at which position, are

used to extract and use as the red, green, and blue color components. If no

bits are extracted, or no data is available, the default color is used.

Usage constraints There are no usage constraints.

Configurations Available in all HDLCD controller configurations.

Attributes See Table B-1 on page B-3.

Figure B-24 on page B-20 shows the bit assignments.

0 1 2 3

0 1 2 Undefined

Undefined10

Undefined0

31 24 23 16 15 8 7 0

31 30 5432 0

BIG_ENDIAN

RESERVED

BYTES_PER_PIXEL

Reserved

Table B-22 Pixel Format Register bit assignments

Bits Name Function

[31] BIG_ENDIAN Use big endian byte order

[30:5] - Reserved, write as zero, read undefined

[4:3] BYTES_PER_PIXEL Number of bytes to extract from the buffer for each pixel to display, minus one

[2:0] - Reserved, write as zero, read undefined

1 2 ... 168 169 170 171 172 173 174 175 176 177 178

Keine Kommentare

ARM AMBA NIC-301 Spezifikationen Seite 173