Motorola MPC8260 - Manual (Page 525)

MOTOROLA Chapter 18. SDMA Channels and IDMA Emulation 18-1
Chapter 18
SDMA Channels and IDMA Emulation
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).
Figure 18-1. SDMA Data Paths
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