ARM AMBA NIC-301 Dokumentacja Pobierz pdf (Strona 174)

HDLCD controller

ID062813 Non-Confidential

Figure B-24 Color Select Register bit assignments

Table B-23 shows the bit assignments.

31 24 23 16 15 12 11 8 7 5 4 0

OFFSET

Reserved

SIZE

Reserved

DEFAULTReserved

Table B-23 Color Select Register bit assignments

Bits Name Function

[31:24] - Reserved, write as zero, read undefined.

[23:16] DEFAULT Default color.

This color is used if SIZE is zero, if the buffer underruns, or while outside the visible frame area.

[15:12] - Reserved, write as zero, read undefined.

[11:8] SIZE Number of bits to extract.

If this value is zero, the default color is used.

If this value is in the range 1-7, the extracted MSBs are repeated for the LSBs until eight bits are reached.

If this value is larger than eight, the behavior is UNDEFINED.

[7:5] - Reserved, write as zero, read undefined.

[4:0] OFFSET Index of the lowest bit to extract.

If OFFSET + SIZE >= 8 + 8 x BYTES_PER_PIXEL the behavior is UNDEFINED.

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

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ARM AMBA NIC-301 Dokumentacja Strona 174