5.6 Timing

5.6.3.9Device pausing an Ultra DMA data out burst

5.6.3.2contains the values for the timings for each of the Ultra DMA Modes.

DMARQ

tRP

 

(device)

 

DMACK- (host)

STOP (host)

DDMARDY- (device)

tRFS

HSTROBE (host)

DD(15:0)

(host)

Notes:

1)The device may negate DMARQ to request termination of the Ultra DMA burst no sooner than tRP after DDMARDY- is negated.

2)After negating DDMARDY-, the device may receive zero, one two or three more data words from the host.

Figure 5.18 Device pausing an Ultra DMA data out burst

C141-E218

5-161

Page 237
Image 237
Fujitsu MHV2120AT, MHV2100AT manual Device pausing an Ultra DMA data out burst, Device DMACK- host Stop host DDMARDY- device