ADSP-BF542 AD [Analog Devices], ADSP-BF542 Datasheet - Page 48

• Manufacturer Part Number: ADSP-BF542
• Description: Embedded Processor
• Manufacturer: AD [Analog Devices]

ADSP-BF542/4/7/8/9
Table 31. External Port Bus Request and Grant Cycle Timing with Asynchronous BR
Parameter
Timing Requirements
t
Switching Characteristics
t
t
t
t
t
t
WBR
SD
SE
DBG
EBG
DBH
EBH
BR Pulsewidth
CLKOUT Low to xMS, Address, and RD/WR disable
CLKOUT Low to AMSx, Address, and ARE/AWE enable
CLKOUT High to BG High Setup
CLKOUT High to BG Deasserted Hold Time
CLKOUT High to BGH High Setup
CLKOUT High to BGH Deasserted Hold Time
AWE
CLKOUT
ADDR19-1
ARE
BGH
BR
AMSx
ABE1-0
BG
Figure 18. External Port Bus Request and Grant Cycle Timing with Asynchronous BR
Rev. PrG | Page 48 of 82 | December 2007
t
WBR
t
t
t
SD
SD
SD
t
t
DBG
DBH
Preliminary Technical Data
Min
2 x t
t
t
EBG
EBH
SCLK
t
t
t
SE
SE
SE
Max
4.5
4.5
3.6
3.6
3.6
3.6
Unit
ns
ns
ns
ns
ns
ns
ns