ADSP-BF522 AD [Analog Devices], ADSP-BF522 Datasheet - Page 40

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

ADSP-BF522/523/524/525/526/527
Asynchronous Memory Write Cycle Timing
Table 32. Asynchronous Memory Write Cycle Timing
1
Parameter
Timing Requirements
t
t
Switching Characteristics
t
t
t
t
Output balls include AMS3–0, ABE1–0, ADDR19–1, DATA15–0, AOE, AWE.
SARDY
HARDY
DDAT
ENDAT
DO
HO
ADDR19–1
DATA15–0
CLKOUT
ABE1–0
AMSx
ARDY
AWE
ARDY Setup Before CLKOUT
ARDY Hold After CLKOUT
DATA15–0 Disable After CLKOUT
DATA15–0 Enable After CLKOUT
Output Delay After CLKOUT
Output Hold After CLKOUT
2 CYCLES
t
ENDAT
SETUP
t
DO
t
t
DO
SARDY
ABE, ADDRESS
WRITE DATA
PROGRAMMED WRITE
ACCESS 2 CYCLES
Figure 11. Asynchronous Memory Write Cycle Timing
1
1
Rev. PrG | Page 40 of 80 | February 2009
t
SARDY
EXTENDED
1 CYCLE
ACCESS
t
t
HO
HARDY
1 CYCLE
HOLD
Min
4.0
0.2
0.0
0.8
V
DDMEM
t
HO
= 1.8 V
Max
Preliminary Technical Data
t
6.0
6.0
DDAT
V
Min
4.0
0.2
0.0
0.8
DDMEM
= 2.5/3.3 V
Max
6.0
6.0
Unit
ns
ns
ns
ns
ns
ns