ADSP21020 AD [Analog Devices], ADSP21020 Datasheet - Page 20

• Manufacturer Part Number: ADSP21020
• Description: 32/40-Bit IEEE Floating-Point DSP Microprocessor
• Manufacturer: AD [Analog Devices]

ADSP-21020
Memory Write
Parameter
Timing Requirement:
t
t
t
t
Switching Characteristic:
t
t
t
t
t
t
t
t
t
t
t
NOTES
*DT = t
See “System Hold Time Calculation” in “Test Conditions” section for calculating hold times given capacitive and DC loads.
x = PM or DM; Address = PMA23-0, DMA31-0; Data = PMD47-0, DMD39-0; Select = PMS1-0, DMS3-0.
DAAK
DWAK
SAK
HAK
DAWH
DAWL
WW
DDWH
DWHA
HDWH
DAP
DCKWL
WWR
DDWR
WDE
C
xACK Delay from Address, Select
xACK Delay from xWR Low
xACK Setup before CLKIN High
xACK Hold after CLKIN High
Address, Select to xWR Deasserted
Address, Select to xWR Low
xWR Pulse Width
Data Setup before xWR High
Address, Select Hold after xWR
Deasserted
Data Hold after xWR Deasserted
xPAGE Delay from Address, Select
CLKIN High to xWR Low
xWR High to xWR or xRD Low
Data Disable before xWR or xRD
Low
xWR Low to Data Enabled
– 50 ns
1
K/B/T Grade K/B/T Grade
Min
14
0
37
11
26
23
1
0
16
17
13
0
20 MHz
Max
27
15
1
26
Min
12
0
28
7
20
18
0
–1
13
13
9
–1
25 MHz
–20–
Max
18
10
1
24
B/T Grade
Min Max
10
0
21
5
16
14
0
–1
12
10
7
–1
30 MHz
12
6
1
22
33.3 MHz Frequency Dependency*
K Grade
Min Max Min
9
0
18
3
15
13
0
–1
11
8
5
–1
9
5
1
21
14 + DT/4
37+ 15DT/16
11 + 3DT/8
26 + 9DT/16
23 + DT/2
1 + DT/16
DT/16
16 + DT/4 26 + DT/4
17 + 7DT/16
13 + 3DT/8
DT/16
Max
27 + 7DT/8 ns
15 + DT/2
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
Unit
REV. C