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參數資料
| 型號： | ADSP2185 |
| 廠商： | Analog Devices, Inc. |
| 元件分類： | 數字信號處理 |
| 英文描述： | DSP Microcomputer |
| 中文描述： | DSP微機 |
| 文件頁數： | 14/32頁 |
| 文件大小： | 289K |
| 代理商： | ADSP2185 |
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ADSP-2185
–14–
REV. 0
E SD SE NSIT IVIT Y
T he ADSP-2185 is an ESD (electrostatic discharge) sensitive device. Electrostatic charges readily
accumulate on the human body and equipment and can discharge without detection. Permanent
damage may occur to devices subjected to high energy electrostatic discharges.
T he ADSP-2185 features proprietary ESD protection circuitry to dissipate high energy discharges
(Human Body Model) per method 3015 of MIL -ST D-883. Proper ESD precautions are recom-
mended to avoid performance degradation or loss of functionality. Unused devices must be stored in
conductive foam or shunts, and the foam should be discharged to the destination before devices are
removed.
ABSOLUT E MAX IMUM RAT INGS*
Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to +7 V
Input Voltage . . . . . . . . . . . . . . . . . . . . –0.3 V to V
DD
+ 0.3 V
Output Voltage Swing . . . . . . . . . . . . . –0.3 V to V
DD
+ 0.3 V
Operating T emperature Range (Ambient) . . –40
°
C to +85
°
C
Storage T emperature Range . . . . . . . . . . . . –65
°
C to +150
°
C
Lead T emperature (5 sec) T QFP . . . . . . . . . . . . . . . +280
°
C
*Stresses above those listed under Absolute Maximum Ratings may cause perma-
nent damage to the device. T hese are stress ratings only; functional operation of
the device at these or any other conditions above those indicated in the operational
sections of this specification is not implied. Exposure to absolute maximum rating
conditions for extended periods may affect device reliability.
ADSP-2185 TIMNGPARAMETERS
GE NE RAL NOT E S
Use the exact timing information given. Do not attempt to
derive parameters from the addition or subtraction of others.
While addition or subtraction would yield meaningful results for
an individual device, the values given in this data sheet reflect
statistical variations and worst cases. Consequently, you cannot
meaningfully add up parameters to derive longer times.
T IMING NOT E S
Switching characteristics specify how the processor changes its
signals. You have no control over this timing—circuitry external
to the processor must be designed for compatibility with these
signal characteristics. Switching characteristics tell you what the
processor will do in a given circumstance. You can also use
switching characteristics to ensure that any timing requirement
of a device connected to the processor (such as memory) is
satisfied.
T iming requirements apply to signals that are controlled by
circuitry external to the processor, such as the data input for a
read operation. T iming requirements guarantee that the proces-
sor operates correctly with other devices.
WARNING!
ESD SENSITIVE DEVICE
ME MORY T IMING SPE CIFICAT IONS
T he table below shows common memory device specifications
and the corresponding ADSP-2185 timing parameters, for your
convenience.
Memory
ADSP-2185 T iming
Device
T iming
Specification
Parameter
Parameter
Definition
Address Setup to
Write Start
Address Setup to
Write End
Address Hold T ime
t
ASW
A0-A13,
xMS
Setup
before
WR
Low
A0-A13,
xMS
Setup
before
WR
Deasserted
A0-A13,
xMS
Hold before
WR
Low
Data Setup before
WR
High
Data Hold after
WR
High
RD
Low to Data Valid
A0-A13,
xMS
to Data
Valid
t
AW
t
WRA
Data Setup T ime
t
DW
Data Hold T ime
OE
to Data Valid
Address Access T ime t
AA
t
DH
t
RDD
xMS
=
PMS,
DMS,
BMS,
CMS,
IOMS.
FRE QUE NCY DE PE NDE NCY FOR T IMING
SPE CIFICAT IONS
t
CK
is defined as 0.5t
CK I
. T he ADSP-2185 uses an input clock
with a frequency equal to half the instruction rate: a 16.67 MHz
input clock (which is equivalent to 60 ns) yields a 30 ns proces-
sor cycle (equivalent to 33 MHz). t
CK
values within the range of
0.5t
CK I
period should be substituted for all relevant timing para-
meters to obtain the specification value.
Example: t
CK H
= 0.5t
CK
– 7 ns = 0.5 (30 ns) – 7 ns = 8 ns
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| ADSP-2185 | 制造商:AD 制造商全稱:Analog Devices 功能描述:DSP Microcomputer |
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| ADSP-2185BST-133 | 制造商:Analog Devices 功能描述:DSP Fixed-Point 16-Bit 33.3MHz 33.3MIPS 100-Pin LQFP 制造商:Analog Devices 功能描述:IC MICROCOMPUTER 32-BIT 制造商:Analog Devices 功能描述:DIGITAL SIGNAL PROCESSOR IC, DSP Type:Floating Point, Package / Case:100-TQFP, S |
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