ADSP-BF561_06 AD [Analog Devices], ADSP-BF561_06 Datasheet - Page 27
ADSP-BF561_06
Manufacturer Part Number
ADSP-BF561_06
Description
Blackfin Embedded Symmetric Multiprocessor
Manufacturer
AD [Analog Devices]
Datasheet
1.ADSP-BF561_06.pdf
(60 pages)
- Current page: 27 of 60
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External Port Bus Request and Grant Cycle Timing
Table 20
bus grant operations.
Table 20. External Port Bus Request and Grant Cycle Timing
1
2
Parameter
Timing Requirements
t
t
Switching Characteristics
t
t
t
t
t
t
These are preliminary timing parameters that are based on worst-case operating conditions.
The pad loads for these timing parameters are 20 pF.
BS
BH
SD
SE
DBG
EBG
DBH
EBH
BR Asserted to CLKOUT High Setup
CLKOUT High to BR Deasserted Hold Time
CLKOUT Low to SMS, Address and RD/WR Disable
CLKOUT Low to SMS, Address and RD/WR Enable
CLKOUT High to BG Asserted Setup
CLKOUT High to BG Deasserted Hold Time
CLKOUT High to BGH Asserted Setup
CLKOUT High to BGH Deasserted Hold Time
and
1, 2
ARE
BR
Figure 12
AMSx
BGH
CLKOUT
ABE3-0
BG
ADDR25-2
AWE
describe external port bus request and
t
BS
Figure 12. External Port Bus Request and Grant Cycle Timing
Rev. A | Page 27 of 60 | May 2006
t
BH
t
t
t
SD
SD
SD
Min
4.6
0.0
t
t
DBG
DBH
Max
4.5
4.5
3.6
3.6
3.6
3.6
t
t
EBG
EBH
ADSP-BF561
t
t
t
SE
SE
SE
Unit
ns
ns
ns
ns
ns
ns
ns
ns
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