M69030 Asiliant Technologies, M69030 Datasheet - Page 321

• Manufacturer Part Number: M69030
• Manufacturer: Asiliant Technologies

Specifications of M69030

• Operating Temperature (min): 0C
• Operating Temperature Classification: Commercial
• Operating Temperature (max): 70C
• Rad Hardened: No
• Lead Free Status / Rohs Status: Supplier Unconfirmed

BR04
doubleword-writable, byte/word/doubleword-readable at memory offsets 400010 and C00010
shared by both pipelines A and B
31
30-26
25-24
`efmp
A
&
B
A
&
B
Tran
Stat
Sel
BB
(0)
(0)
31
15

BitBLT Engine Status
Reserved
BitBLT Engine Color Depth
69030 Databook
Tran
Enl
(0)
14
30
BitBLT Control Register
Note: This bit is read-only -- writes to this bit are ignored.
0: Indicates that the BitBLT engine is idle.
1: Indicates that the BitBLT engine is busy.
These bits always return 0 when read.
When bit 23 of this register is set to 1, these 2 bits configure the color depth of the BitBLT
engine. If bit 23 of this register is set to 0, then this function is performed by bits 5 and 4 of
XR20.
The choice of color depth configures the BitBLT engine to work with one, two or three bytes
per pixel. This directly affects the number of bytes of graphics data that the BitBLT engine
will read and write for a given number of pixels. In the case of monochrome source or
pattern data, this setting directly affects the color depth into which such monochrome data
will be converted during the color expansion process.
It is strongly recommended that, when possible, the color depth of the BitBLT engine be set
to match the color depth to which the rest of graphics system has been set. However, if the
rest of the graphics system has been set to a color depth that is not supported by the BitBLT
engine, then it is strongly recommended that the BitBLT engine not be used. See the
section on the BitBLT engine for more information.
Mask
Src
13
(0)
29
Reserved
(000:00)
Dep
Src
(0)
12
28
Rsvd
(0)
27
11
25 24
0 0
0 1
1 0
1 1
Bit
Src
Sel
10
(0)
26
BitBLT Engine Color Depth Selected
16 bits per pixel (2 bytes per pixel)
24 bits per pixel (3 bytes per pixel)
Point Select
Color Depth
BitBLT Eng
8 bits per pixel (1 byte per pixel)
25
BitBLT Registers
9
This is the default after reset.
Starting
(00)
(00)
24
8
Reserved
Dep
Ctrl
23
(0)
7
22
Pattern Vertical
6
Alignment
(000)
21
5
Bit-Wise Operation
20
4
Select
(00h)
Sol
Pat
(0)
19
3
Revision 1.3 11/24/99
Dep
Pat
(0)
18
2
Mask
Pat
(0)
17
1
Tran
Sel
17-7
(0)
16
0