Motorola PowerQUICC II MPC8280 Series Reference Manual page 25

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19.5.2.2.2 Memory-to-Peripheral Fly-By Transfers ............................................. 19-12
19.5.3 Controlling 60x Bus Bandwidth .................................................................. 19-13
19.5.4 PCI Burst Length and Latency Control ....................................................... 19-14
19.6 IDMA Priorities ............................................................................................... 19-14
19.7 IDMA Interface Signals................................................................................... 19-14
19.7.1 DREQx and DACKx.................................................................................... 19-15
19.7.1.1 Level-Sensitive Mode.............................................................................. 19-16
19.7.1.2 Edge-Sensitive Mode............................................................................... 19-16
19.7.2 DONEx......................................................................................................... 19-16
19.8 IDMA Operation.............................................................................................. 19-17
19.8.1 Auto Buffer and Buffer Chaining ................................................................ 19-17
19.8.2 IDMAx Parameter RAM ............................................................................. 19-18
19.8.2.1 DMA Channel Mode (DCM)................................................................... 19-20
19.8.2.2 Data Transfer Types as Programmed in DCM......................................... 19-22
19.8.2.3 Programming DTS and STS .................................................................... 19-23
19.8.3 IDMA Performance ..................................................................................... 19-24
19.8.4 IDMA Event Register (IDSR) and Mask Register (IDMR) ........................ 19-25
19.8.5 IDMA BDs................................................................................................... 19-25
19.9 IDMA Commands............................................................................................ 19-28
19.9.1
START
19.9.2 _
STOP
19.10 IDMA Bus Exceptions..................................................................................... 19-29
19.10.1 Externally Recognizing IDMA Operand Transfers ..................................... 19-30
19.11 Programming the Parallel I/O Registers .......................................................... 19-30
19.12 IDMA Programming Examples ....................................................................... 19-31
19.12.1 Peripheral-to-Memory Mode (60x Bus to Local Bus)—IDMA2 ................ 19-31
19.12.2 Memory-to-Peripheral Fly-By Mode—IDMA3 .......................................... 19-33
19.12.3 Memory-to-Memory (PCI Bus to 60x Bus)—IDMA1 ................................ 19-34
20.1 Features .............................................................................................................. 20-2
20.1.1 The General SCC Mode Registers (GSMR1–GSMR4) ................................ 20-3
20.1.2 Protocol-Specific Mode Register (PSMR) .................................................... 20-9
20.1.3 Data Synchronization Register (DSR)........................................................... 20-9
20.1.4 Transmit-on-Demand Register (TODR) ...................................................... 20-10
20.2 SCC Buffer Descriptors (BDs) ........................................................................ 20-11
20.3 SCC Parameter RAM....................................................................................... 20-13
20.3.1 SCC Base Addresses.................................................................................... 20-15
20.3.2 Function Code Registers (RFCR and TFCR) .............................................. 20-15
20.3.3 Handling SCC Interrupts ............................................................................. 20-16
MOTOROLA
Freescale Semiconductor, Inc.
Contents
Title
_ Command ............................................................................... 19-28
IDMA
Command ................................................................................. 19-29
IDMA
Chapter 20
Serial Communications Controllers (SCCs)
Contents
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