ADSP-2105BP-80 Analog Devices Inc, ADSP-2105BP-80 Datasheet - Page 33

• Manufacturer Part Number: ADSP-2105BP-80
• Description: IC,DSP,16-BIT,CMOS,LDCC,68PIN,PLASTIC
• Manufacturer: Analog Devices Inc
• Series: ADSP-21xxr
• Type: Fixed Pointr

Specifications of ADSP-2105BP-80

• Rohs Status: RoHS non-compliant
• Interface: Synchronous Serial Port (SSP)
• Clock Rate: 20MHz
• Non-volatile Memory: External
• On-chip Ram: 3kB
• Voltage - I/o: 5.00V
• Voltage - Core: 5.00V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 68-PLCC
• Package: 68PLCC
• Numeric And Arithmetic Format: Fixed-Point
• Maximum Speed: 20 MHz
• Ram Size: 1.5 KB
• Device Million Instructions Per Second: 20 MIPS

REV. B
TIMING PARAMETERS (ADSP-2101/2105/2111/2115/2161/2163)
MEMORY READ
Parameter
Timing Requirement:
t
t
t
Switching Characteristic:
t
t
t
t
t
Parameter
Timing Requirement:
t
t
t
Switching Characteristic:
t
t
t
t
t
NOTES
1
w = wait states
RDD
AA
RDH
RP
CRD
ASR
RDA
RWR
RDD
AA
RDH
RP
CRD
ASR
RDA
RWR
For 25 MHz only minimum frequency dependency formula for t
RD Low to Data Valid
A0–A13, PMS, DMS, BMS to Data Valid
Data Hold from RD High
RD Pulse Width
CLKOUT High to RD Low
A0–A13, PMS, DMS, BMS Setup before
RD Low
A0–A13, PMS, DMS, BMS Hold after RD
Deasserted
RD High to RD or WR Low
RD Low to Data Valid
A0–A13, PMS, DMS, BMS to Data Valid
Data Hold from RD High
RD Pulse Width
CLKOUT High to RD Low
A0–A13, PMS, DMS, BMS Setup before
RD Low
A0–A13, PMS, DMS, BMS Hold after RD
Deasserted
RD High to RD or WR Low
t
CK.
DMS, PMS
CLKOUT
A0 – A13
BMS
RD
WR
D
ASR
Figure 32. Memory Read
= (0.25t
13 MHz
Min Max
0
33.5
14.2 29.2
9.2
10.2
33.5
t
CRD
CK
t
23.5
37.7
ASR
Frequency Dependency
(CLKIN 25 MHz)
Min
0
0.5t
0.25t
0.25t
0.25t
0.5t
– 8.5).
t
–33–
AA
CK
CK
CK
CK
CK
13.824 MHz
Min
0
28.2
13.1
8.1
9.1
31.2
– 8 + w
– 5
– 5
– 10
– 9
t
RDD
t
RP
1
Max
23.2
36.2
28.1
16.67 MHz
Min
0
22
10
5
6
25
t
RDA
t
RDH
Max
17
27
25
t
Max
0.5t
0.75t
0.25t
RWR
CK
CK
CK
20 MHz
Min Max Min Max Unit
0
17
7.5
2.5
3.5
20
– 13 + w
– 18 + w
+ 10
12
19.5
22.5 5
ADSP-21xx
25 MHz
0
12
1.5
1
15
1
7
12
20
ns
ns
ns
ns
ns
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns