Clearing Request Queues By Dtr Format; Table 14.15 Notification Of Transfer Channel In Eight-Channel Ddt Mode; Table 14.16 Function Of Bavl - Hitachi SH7750 Hardware Manual

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TDACK = High

Clearing Request Queues by DTR Format

In DDT mode, the request queues of any channel can be cleared by using DTR.ID, DTR.MD,

DTR.SZ, and DTR.COUNT [7:4] in a DTR format. This function is only available when

DMAOR.DBL = 1. Table 14.17 shows the DTR format settings for clearing request queues.

Function of BAVL

Bus available (data-bus enabled)

Notification of channel number (ID2)

Transfer Channel

Rev. 6.0, 07/02, page 587 of 986

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