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
Содержание MPC8260 PowerQUICC II
Страница 1: ...MPC8260UM D 4 1999 Rev 0 MPC8260 PowerQUICC II UserÕs Manual ª ª ...
Страница 32: ...xxxii MPC8260 PowerQUICC II UserÕs Manual MOTOROLA CONTENTS Paragraph Number Title Page Number ...
Страница 66: ...lxvi MPC8260 PowerQUICC II UserÕs Manual MOTOROLA ...
Страница 88: ...1 18 MPC8260 PowerQUICC II UserÕs Manual MOTOROLA Part I Overview ...
Страница 120: ...2 32 MPC8260 PowerQUICC II UserÕs Manual MOTOROLA Part I Overview ...
Страница 138: ...Part II iv MPC8260 PowerQUICC II UserÕs Manual MOTOROLA Part II Configuration and Reset ...
Страница 184: ...4 46 MPC8260 PowerQUICC II UserÕs Manual MOTOROLA Part II ConÞguration and Reset ...
Страница 202: ...Part III vi MPC8260 PowerQUICC II UserÕs Manual MOTOROLA Part III The Hardware Interface ...
Страница 266: ...8 34 MPC8260 PowerQUICC II UserÕs Manual MOTOROLA Part III The Hardware Interface ...
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Страница 430: ...Part IV viii MOTOROLA Part IV Communications Processor Module ...
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Страница 980: ...A 4 MPC8260 PowerQUICC II UserÕs Manual MOTOROLA Appendixes ...
Страница 1002: ...Index 22 MPC8260 PowerQUICC II UserÕs Manual MOTOROLA INDEX ...
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