ADSP-BF522 AD [Analog Devices], ADSP-BF522 Datasheet - Page 39

• Manufacturer Part Number: ADSP-BF522
• Description: Blackfin Embedded Processor
• Manufacturer: AD [Analog Devices]

Preliminary Technical Data
Asynchronous Memory Read Cycle Timing
Table 31. Asynchronous Memory Read Cycle Timing
1
Parameter
Timing Requirements
t
t
t
t
Switching Characteristics
t
t
Output balls include AMS3–0, ABE1–0, ADDR19–1, AOE, ARE.
SDAT
HDAT
SARDY
HARDY
DO
HO
CLKOUT
ADDR19–1
AMSx
ABE1–0
AOE
ARE
ARDY
DATA15–0
DATA15–0 Setup Before CLKOUT
DATA15–0 Hold After CLKOUT
ARDY Setup Before CLKOUT
ARDY Hold After CLKOUT
Output Delay After CLKOUT
Output Hold After CLKOUT
2 CYCLES
SETUP
t
DO
Figure 10. Asynchronous Memory Read Cycle Timing
1
1
PROGRAMMED READ ACCESS
t
Rev. PrG | Page 39 of 80 | February 2009
DO
t
SARDY
4 CYCLES
ABE, ADDRESS
t
HARDY
Min
2.1
0.9
4.0
0.2
0.8
ADSP-BF522/523/524/525/526/527
V
DDMEM
ACCESS EXTENDED
= 1.8 V
t
SARDY
3 CYCLES
Max
6.0
t
t
HO
SDAT
t
READ
HARDY
V
Min
2.1
0.8
4.0
0.2
0.8
DDMEM
1 CYCLE
HOLD
= 2.5/3.3 V
t
HDAT
Max
6.0
t
HO
Unit
ns
ns
ns
ns
ns
ns