ADSP21020 AD [Analog Devices], ADSP21020 Datasheet - Page 18

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

ADSP-21020
Memory Read
Parameter
Timing Requirement:
t
t
t
t
t
t
t
t
Switching Characteristic:
t
t
t
t
t
NOTES
*DT = t
x = PM or DM; Address = PMA23-0, DMA31-0; Data = PMD47-0, DMD39-0; Select = PMS1-0, DMS3-0.
DAD
DRLD
HDA
HDRH
DAAK
DRAK
SAK
HAK
DARL
DAP
DCKRL
RW
RWR
CK
Address, Select to Data Valid
xRD Low to Data Valid
Data Hold from Address, Select
Data Hold from xRD High
xACK Delay from Address
xACK Delay from xRD Low
xACK Setup before CLKIN High
xACK Hold after CLKIN High
Address, Select to xRD Low
xPAGE Delay from Address, Select
CLKIN High to xRD Low
xRD Pulse Width
xRD High to xRD, xWD Low
– 50 ns
K/B/T Grade K/B/T Grade B/T Grade
Min
0
–1
14
0
8
16
26
17
20 MHz
Max
37
24
27
15
1
26
Min
0
–1
12
0
4
13
20
13
25 MHz
–18–
Max
27
18
18
10
1
24
Min Max Min Max Min
0
–1
10
0
2
12
15
11
30 MHz
20
13
12
6
1
22
0
–1
9
0
0
11
13
9
33.3 MHz Frequency Dependence*
K Grade
17
11
9
5
1
21
14 + DT/4
8 + 3DT/8
16 + DT/4 26 + DT/4
26 + 5DT/8
17 + 3DT/8
Max
37 + DT
24 + 5DT/8
27 + 7DT/8
15 + DT/2
REV. C
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns