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參數資料
| 型號： | ADSP-2189NBST-320 |
| 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： | 24-BIT, 40 MHz, OTHER DSP, PQFP100 |
| 封裝： | MS-026BED, LQFP-100 |
| 文件頁數： | 15/32頁 |
| 文件大?。?/td> | 244K |
| 代理商： | ADSP-2189NBST-320 |
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REV. A
ADSP-2189M
–
15
–
TIMING PARAMETERS
GENERAL NOTES
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.
TIMING NOTES
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.
Timing requirements apply to signals that are controlled by
circuitry external to the processor, such as the data input for a
read operation. Timing requirements guarantee that the proces-
sor operates correctly with other devices.
MEMORY TIMING SPECIFICATIONS
The table below shows common memory device specifications
and the corresponding ADSP-2189M timing parameters, for
your convenience.
Memory
Device
Specification
Timing
Parameter
Parameter Definition
1
Address Setup to
Write Start
Address Setup to
Write End
Address Hold Time
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 Time
t
DW
Data Hold Time
OE
to Data Valid
Address Access Time t
AA
t
DH
t
RDD
NOTE
1
xMS
=
PMS
,
DMS
,
BMS
,
CMS
or
IOMS
.
ABSOLUTE MAXIMUM RATINGS
1
Value
Parameter
Min
Max
Internal Supply Voltage (V
DDINT
)
External Supply Voltage (V
DDEXT
)
Input Voltage
2
Output Voltage Swing
3
Operating Temperature Range (Ambient)
Storage Temperature Range
Lead Temperature (5 sec) LQFP
–0.3 V
–0.3 V
–0.5 V
–0.5 V
–40
°
C
–65
°
C
+3.0 V
+4.6 V
+4.6 V
V
DDEXT
+ 0.5 V
+85
C
+150
°
C
+280
°
C
NOTES
1
Stresses above those listed under Absolute Maximum Ratings may cause perma-
nent damage to the device. These 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.
2
Applies to Bidirectional pins (D0–D23, RFS0, RFS1, SCLK0, SCLK1, TFS0,
TFS1, A1–A13, PF0–PF7) and Input only pins (CLKIN,
RESET
,
BR
, DR0,
DR1,
PWD
).
3
Applies to Output pins (
BG
,
PMS
,
DMS
,
BMS
,
IOMS
,
CMS
,
RD
,
WR
,
PWDACK
,
A0, DT0, DT1, CLKOUT, FL2-0,
BGH
).
CAUTION
ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily
accumulate on the human body and test equipment and can discharge without detection.
Although the ADSP-2189M features proprietary ESD protection circuitry, permanent damage
may occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD
precautions are recommended to avoid performance degradation or loss of functionality.
WARNING!
ESD SENSITIVE DEVICE
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