Blksrcwidth, Regi, Srclinelength – Cirrus Logic EP93xx User Manual
Page 290: Srclinelength“s, Rclinelength
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DS785UM1
Copyright 2007 Cirrus Logic
Graphics Accelerator
EP93xx User’s Guide
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BLKSRCWIDTH
Address:
0x8004_0010 - Read/Write
Default:
0x0000_0000
Mask:
0x0000_0FFF
Definition:
Block Function Source Width Register
Bit Descriptions:
RSVD:
Reserved. Unknown during read.
WIDTH:
Width - Read/Write
For a Block Copy function, the value in this field specifies
the number of 32-bit words, minus 1, that are needed to
contain the pixels in the 1st scan line of the source image.
For an example, please refer to
Six 32-bit words are needed to contain six 24-bit pixels.
So, WIDTH = 6 - 1 = 5 = 0x5.
The maximum value for the field is 0xFFE = 4095 words.
SRCLINELENGTH
Address:
0x8004_0014 - Read/Write
Default:
0x0000_0000
Mask:
0x0000_0FFF
Definition:
Block Source Line Length Register
Bit Descriptions:
RSVD:
Reserved - Unknown during read
LEN:
Length - Read/Write
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
RSVD
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
RSVD
WIDTH
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
RSVD
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
RSVD
LEN