adsp-2188m Analog Devices, Inc., adsp-2188m Datasheet - Page 20

• Manufacturer Part Number: adsp-2188m
• Description: Dsp Microcomputer
• Manufacturer: Analog Devices, Inc.

TIMING SPECIFICATIONS
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 require-
ment 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.
ABSOLUTE MAXIMUM RATINGS
Parameter
Internal Supply Voltage (V
External Supply Voltage (V
Input Voltage
Output Voltage Swing
Operating Temperature Range
Storage Temperature Range
Lead Temperature (5 sec) LQFP
ADSP-2188M
ESD SENSITIVITY
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-2188M 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.
2
3
DDINT
DDEXT
)
)
1
–0.3 V
–0.3 V
–0.5 V
–0.5 V
–40°C
–65°C
Min
Value
Max
+3.0 V
+4.0 V
+4.0 V
V
+85°C
+150°C
280°C
DDEXT
+ 0.5 V
MEMORY TIMING SPECIFICATIONS
The table below shows common memory device specifications
and the corresponding ADSP-2188M timing parameters, for
your convenience.
Memory
Device
Specification
Address Setup to
Address Setup to
Address Hold Time
Data Setup Time
Data Hold Time
OE to Data Valid
Address Access Time t
NOTE
1
NOTES
1
2
3
Stresses greater than those listed may cause permanent damage to the device.
Applies to Bidirectional pins (D0–D23, RFS0, RFS1, SCLK0, SCLK1, TFS0,
Applies to Output pins (BG, PMS, DMS, BMS, IOMS, CMS, RD, WR, PWDACK,
xMS = PMS, DMS, BMS, CMS or IOMS.
These are stress ratings only; functional operation of the device at these or any other
conditions greater than those indicated in the operational sections of this specifi-
cation is not implied. Exposure to absolute maximum rating conditions for
extended periods may affect device reliability.
TFS1, A1–A13, PF0–PF7) and Input only pins (CLKIN, RESET, BR, DR0,
DR1, PWD).
A0, DT0, DT1, CLKOUT, FL2–0, BGH).
Write Start
Write End
Parameter Definition
t
t
t
t
t
t
ASW
AW
WRA
DW
DH
RDD
AA
WARNING!
Timing
Parameter
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
ESD SENSITIVE DEVICE
1