ADSP-BF531WBBCZ-4A AD [Analog Devices], ADSP-BF531WBBCZ-4A Datasheet - Page 25

• Manufacturer Part Number: ADSP-BF531WBBCZ-4A
• Description: Blackfin Embedded Processor
• Manufacturer: AD [Analog Devices]

Asynchronous Memory Read Cycle Timing
Table 16. Asynchronous Memory Read Cycle Timing
1
Parameter
Timing Requirements
t
t
t
t
Switching Characteristics
t
t
Output pins include AMS3–0, ABE1–0, ADDR19–1, AOE, ARE.
SDAT
HDAT
SARDY
HARDY
DO
HO
CLKOUT
AMSx
ABE1–0
ADDR19–1
ARE
ARDY
AOE
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
1
1
Figure 11. Asynchronous Memory Read Cycle Timing
PROGRAMMED READ ACCESS
t
DO
Rev. D | Page 25 of 60 | August 2006
4 CYCLES
t
SARDY
ABE, ADDRESS
t
HARDY
ACCESS EXTENDED
3 CYCLES
t
SARDY
ADSP-BF531/ADSP-BF532
V
Min
2.1
1.0
4.0
1.0
1.0
DDEXT
t
t
HO
SDAT
READ
= 1.8 V V
Max
6.0
t
HARDY
1 CYCLE
HOLD
Min
2.1
0.8
4.0
0.0
0.8
DDEXT
t
HDAT
= 2.5 V/3.3 V
Max
6.0
t
HO
Unit
ns
ns
ns
ns
ns
ns