Motorola PowerQUICC II MPC8280 Series Reference Manual page 592

Dual-Port RAM
14.5 Dual-Port RAM
The CPM has 64 Kbytes of static RAM. This RAM is divided into two 32-Kbyte blocks of
RAM.
• 32 Kbytes of CPM-RISC data RAM. This RAM is used to store CPM-RISC
parameter RAM and data structures
• 32 Kbytes CPM-RISC instructions RAM. This RAM is used to store a microcode
package of up to 8 K instructions.
Figure 14-7 shows a block diagram of the internal RAM modules.
RISC data address
DMA (PPC) address
DMA (local) address
RISC Instruction address
RISC trace buffer address
14-18
Freescale Semiconductor, Inc.
Internal Data RAM
Slave address
32 Kbytes
BTM address
Internal Instruction RAM
Slave address
32 Kbytes
Figure 14-7. Internal RAM Block Diagram
MPC8280 PowerQUICC II Family Reference Manual
For More Information On This Product,
Go to: www.freescale.com
Slave data
RISC data
DMA (PPC) data
DMA (local) data
BTM data
Slave data
RISC instruction
Trace buffer data
MOTOROLA