adsp-bf548 Analog Devices, Inc., adsp-bf548 Datasheet - Page 55

• Manufacturer Part Number: adsp-bf548
• Description: Blackfin Embedded Processor
• Manufacturer: Analog Devices, Inc.

External DMA Request Timing
Table 34
operations.
Table 34. External DMA Request Timing
Parameter
Timing Parameters
t
t
t
t
DR
DH
DMARACT
DMARINACT
and
Figure 26
(Active High)
(Active Low)
DMAR0/1
DMAR0/1
CLKOUT
DMARx Asserted to CLKOUT High Setup
CLKOUT High to DMARx Deasserted Hold Time
DMARx Active Pulse Width
DMARx Inactive Pulse Width
describe the External DMA Request
ADSP-BF542/ADSP-BF544/ADSP-BF547/ADSP-BF548/ADSP-BF549
t
DR
t
t
DMARACT
DMARACT
Rev. A | Page 55 of 88 | October 2008
Figure 26. External DMA Request Timing
t
DH
t
t
DMARINACT
DMARINACT
Min
6.0
0.0
1.0 × t
1.75 × t
SCLK
SCLK
Max
Unit
ns
ns
ns
ns