PXD20RM Datasheet, PDF (863/1628 Pages) Freescale Semiconductor, Inc – PXD20 Microcontroller

• Byte Swapper for read and write data
— Supports only 64-bit access
• Frame buffer Color Depth Conversion (32bpp to 24bpp)
— Programmable destination base address
— Byte indicator for alpha component
— Supports only 32-byte incrementing bursts
• Alpha buffer Write Suppression and Read Constant Return
• Semaphore handshake for exclusive access to external serial flash
22.2 External Signal Description
The GXG does not include any external signals.
22.3 Memory Map and Register Definition
This section provides a detailed description of all GXG registers.
22.3.1 Memory Map
The GXG 16K space memory map is shown in Table 22-2. The address of each register is given as an offset
to the GXG base address.
Table 22-2. GXG Memory Map
Offset
Register
Access Reset Value Section/Page
0x00
0x04
0x08
0x0C
0x10
0x14
0x18
0x1C
0x20
0x24
0x28
0x2C
0x30
0x34
GXGCNFG0—Window 0 Configuration
GXGBASE0—Window 0 Destination Base Address
GXGFRST0—Window 0 First Address
GXGLAST0—Window 0 Last Address
GXGCNFG1—Window 1 Configuration
GXGBASE1—Window 1 Destination Base Address
GXGFRST1—Window 1 First Address
GXGLAST1—Window 1 Last Address
GXGCNFG2—Window 2 Configuration
GXGBASE2—Window 2 Destination Base Address
GXGFRST2—Window 2 First Address
GXGLAST2—Window 2 Last Address
GXGCNFG3—Window 3 Configuration
GXGBASE3—Window 3 Destination Base Address
R/W 0x0000_0000 22.3.2.1/22-4
R/W 0x0000_0000 22.3.2.2/22-5
R/W 0x0000_0000 22.3.2.3/22-6
R/W 0x0000_0000 22.3.2.4/22-7
R/W 0x0000_0000 22.3.2.1/22-4
R/W 0x0000_0000 22.3.2.2/22-5
R/W 0x0000_0000 22.3.2.3/22-6
R/W 0x0000_0000 22.3.2.4/22-7
R/W 0x0000_0000 22.3.2.1/22-4
R/W 0x0000_0000 22.3.2.2/22-5
R/W 0x0000_0000 22.3.2.3/22-6
R/W 0x0000_0000 22.3.2.4/22-7
R/W 0x0000_0000 22.3.2.1/22-4
R/W 0x0000_0000 22.3.2.2/22-5
Freescale Semiconductor
PXD20 Microcontroller Reference Manual, Rev. 1
Preliminary—Subject to Change Without Notice
22-3