Owner's manual

Table Of Contents
8-34 DS785UM1
Copyright 2007 Cirrus Logic
Graphics Accelerator
EP93xx User’s Guide
8
8
8
TRANSPATTRN
Address: 0x8004_0028 - Read/Write
Default: 0x0000_0000
Mask: 0x00FF_FFFF
Definition: Block Function Transparency Pattern Register
Bit Descriptions:
RSVD: Reserved - Unknown during read
PATRN: Transparent Bit Pattern - Read/Write
The value in this field specifies a transparent bit pattern.
Transparent pixel transfers are not written. The
transparent pixel definition is located in the least
significant BPP part of the field for modes less than
24 bpp. Bits 0-23 are used for 24 bpp mode, bits 0-15 are
used for 16 bpp mode, bits 0-7 are used for 8 bpp mode,
and bits 0-3 are used for 4 bpp mode.
BLOCKMASK
Address: 0x8004_002C - Read/Write
Default: 0x0000_0000
Mask: 0x00FF_FFFF
Definition: Block Mask Register
Bit Descriptions:
RSVD: Reserved - Unknown during read
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
RSVD PATRN
1514131211109876543210
PATRN
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
RSVD MASK
1514131211109876543210
MASK