PXD20RM Datasheet, PDF (1136/1628 Pages) Freescale Semiconductor, Inc – PXD20 Microcontroller

• Vector graphics rendering system CPU load:
— Display list generation during path creation ñ commands and vertices are stored to an internal
format/buffer, no format conversion is performed
— Filling or stroking a path only requires a few register writes to start the operation in hardware
— Display lists are transferred to the vector graphics rasterizer using DMA without CPU
interaction
31.2 External Signal Description
The GFX2D does not include any external signals.
31.3 Memory Map and Register Definition
This section provides a detailed description of the GFX2D external registers that are mapped to aperture.
The GFX2D 16K space memory map is shown in Table 31-1. The address of each register is given as an
offset to the GFX2D base address.
Table 31-1. GFX2D Memory Map
Offset Register
0x000
0x3fc
0x400
0x410
0x418
0x438
0x4e0
0x508
0x510
0x518
0x7c0
G12_COMMANDSTREAM—Command Stream Input
G12_MMUCOMMANDSTREAM—MMU Command Stream Input
G12_REVISION—Revision
G12_SYSSTATUS—System Status
G12_IRQSTATUS—Interrupt Status
G12_IRQENABLE—Interrupt Enable
G12_IRQ_ACTIVE_CNT—Active Interrupt Counters
G12_CLOCKEN—Clock Enable
MMU_READ_ADDR—MMU Read Address
MMU_READ_DATA—MMU Read Data
G12_FIFOFREE—FIFO Free
Access Reset Value Location
W 0x0000_0000 on page 31-4
W 0x0000_0000 on page 31-5
R 0x0000_0000 on page 31-5
R 0x0000_0000 on page 31-5
R/W 0x0000_0000 on page 31-6
R/W 0x0000_0000 on page 31-6
R 0x0000_0000 on page 31-7
R/W 0x0000_000F on page 31-7
W 0x0000_0000 on page 31-8
R 0x0000_00FF on page 31-8
R 0x0000_0000 on page 31-9
31.3.1 G12_COMMANDSTREAM
Offset 0x000
Access: User write
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
R0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
W
DATA
Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Figure 31-2. Command Stream input (G12_COMMANDSTREAM)
31-4
PXD20 Microcontroller Reference Manual, Rev. 1
Preliminary—Subject to Change Without Notice
Freescale Semiconductor