MEC1322 datasheet(268/456 Pages) MICROCHIP

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MEC1322

DS00001719D-page 268

 2014 - 2015 Microchip Technology Inc.

18 LOCK_CHANNEL

This is used to lock the arbitration of the Channel Arbiter on this

channel once this channel is granted.

Once this is locked, it will remain on the arbiter until it has completed

it transfer (either the Transfer Aborted, Transfer Done or Transfer

Terminated conditions).

Note:

This setting may starve other channels if the locked chan-

nel takes an excessive period of time to complete.

RESET

17 INCREMENT_DEVICE_ADDRESS

This will enable an auto-increment to the DMA Channel Device

Address.

Increment the DMA Channel Device Address by DMA Channel

Control:Transfer Size

after every Data Packet transfer

Do nothing

RESET

16 INCREMENT_MEMORY_ADDRESS

This will enable an auto-increment to the DMA Channel Memory

Address.

1=Increment the DMA Channel Memory Address by DMA Channel

Control:Transfer Size after every Data Packet transfer

0=Do nothing

Note:

If this is not set, the DMA will never terminate the transfer

on its own. It will have to be terminated through the

Hard-

ware Flow Control or through a DMA Channel Con-

trol:Transfer Abort.

RESET

15:9 HARDWARE_FLOW_CONTROL_DEVICE

This is the device that is connected to this channel as its Hardware

Flow Control

master.

The Flow Control Interface is a bus with each master concatenated

onto it. This selects which bus index of the concatenated Flow Con-

trol Interface

bus is targeted towards this channel.

The Flow Control Interface Port list is dma_req, dma_term, and

dma_done

RESET

8 TRANSFER_DIRECTION

This determines the direction of the DMA Transfer.

1=Data Packet Read from Memory Start Address followed by Data

Packet Write to Device Address

0=Data Packet Read from Device Address followed by Data Packet

Write to Memory Start Address

RESET

7:6 Reserved

5BUSY

This is a status signal.

1=The DMA Channel is busy (FSM is not IDLE)

0=The DMA Channel is not busy (FSM is IDLE)

RESET

Offset

10h

Bits

Description

Type

Default

Reset

Event

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