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NXP Semiconductors
PNX15xx/952x Series
Volume 1 of 1
Chapter 20: 2D Drawing Engine
PNX15XX_PNX952X_SER_N_4
NXP B.V. 2007. All rights reserved.
Product data sheet
Rev. 4.0 — 03 December 2007
20-632
This register species the offset for pixel (0,0) of a source bitmap for XY to Linear
conversion of addresses.
This register is interpreted as a byte address. The lower three bits of this register
always read 0, regardless of the value written. This implies that the source base
address must be aligned to a 64-bit boundary.
Under many circumstances, this register will be initialized to the proper offset and
then changed only for special effects.
This register species the offset for pixel (0,0) of a destination bitmap for XY to Linear
conversion of addresses.
This register is interpreted as a byte address. The lower three bits of this register are
always interpreted as 0, regardless of the value written. When reading the contents of
this register, the lower three bits will be read back as 0. This implies that the source
base address must be aligned to a 64-bit boundary.
Under many circumstances, this register will be initialized to the proper offset and
then changed only for special effects.
23:16
Off[22:16]
R/W
-
Species the offset for pixel (0,0) of a source bitmap for XY to Linear
conversion of addresses. Bits 2:0 must be set to 0.
15:8
Off[15:8]
R/W
-
7:0
Off[7:0]
R/W
-
Table 8: Registers Description
Bit
Symbol
Acces
s
Value
Description
Table 9: Destination Address Base
Bit
Symbol
Acces
s
Value
Description
Offset 0x04 F404
Destination Address Base
31:29
Swap[2:0]
R/W
-
Species endian-swapping on reads from memory.
When Swap[2] is 0, swapping is determined by the global endian
setting, possibly modied by BSI[0] in EngineCong.
When Swap[2] is 1, swapping is determined by Swap[1:0] as shown:
00=No swapping. Memory is little-endian.
01=Bytes are swapped within each 16-bit word.
10=Words are swapped within each 32-bit double word.
11=Bytes are swapped within each 32-bit double word.
28:24
Reserved
23:16
Off[22:16]
R/W
-
Specify the offset for pixel (0,0) of a destination bitmap for XY to
Linear conversion of addresses. Bits 2:0 must be set to 0.
15:8
Off[15:8]
R/W
-
7:0
Off[7:0]
R/W
-