Motorola MPC8260 User Manual

MOTOROLA

Chapter 18.  SDMA Channels and IDMA Emulation  

18-1

180

180

The MPC8260 has two physical serial DMA (SDMA) channels. The CP implements two
dedicated virtual SDMA channels for each FCC, MCC, SCC, SMC, SPI, and I

2

CÑone for

each transmitter and receiver. An additional four virtual SDMA channels are assigned to the
programmable independent DMA (IDMA) channels.

Figure 18-1 shows data ßow paths. Data from the peripheral controllers can be routed to
external RAM using the 60x bus (path 1) or the local bus (path 2). 

External

RAM

External

ROM

Internal 60x Bus

Core

CP

SDMA

Dual-Port

RAM

1

3 FCCs

External

RAM

2

60x

Local

2 MCCs

4 SCCs

SPI

2 SMCs

I

2

C