Cirrus Logic EP93 Series User Manual page 301

Bit Descriptions:
RSVD:
YINIT:
XINIT:
LINEPATTRN
31 30 29 28
15 14 13 12
Address: 0x8004_003C - Read/Write
Default: 0x000F_FFFF
Mask: 0x000F_FFFF
Definition: Line Pattern Register
Bit Descriptions:
RSVD:
CNT:
PATRN:
DS785UM1
Reserved - Unknown during read
Y Initialization - Read/Write
The value in this field specifies a 12 bit binary fraction of a
pixel that provides sub-pixel precision to the algorithm.
The minimum fractional value is 1/4096. This field can also
be initialized to account for truncation errors in the drawing
algorithm.
X Initialization - Read/Write
The value in this field specifies a 12 bit binary fraction of a
pixel that provides sub-pixel precision to the algorithm.
The minimum fractional value is 1/4096. This field can also
be initialized to account for truncation errors in the drawing
algorithm.
27 26 25 24
RSVD
11 10 9 8
PATRN
Reserved - Unknown during read
The value in this field specifies the pixel position in the
PATRN field that defines the end of the pattern. It is used
as the repeat interval for the pattern counter.
The bit values in this field specify an 'on' and 'off' pattern
that is to be used during a Line Draw function. The pattern
will repeat based on the CNT value.
A '1' causes a pixel fill from the
Copyright 2007 Cirrus Logic
23 22 21 20
7 6 5 4
BLOCKMASK
Graphics Accelerator
EP93xx User's Guide
19 18 17 16
CNT
3 2 1 0
register.
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8