adsp-2165ks-80 Analog Devices, Inc., adsp-2165ks-80 Datasheet - Page 21

• Manufacturer Part Number: adsp-2165ks-80
• Description: Dsp Microcomputers With Rom
• Manufacturer: Analog Devices, Inc.

Memory Device Specification
Address Setup to Write Start
Address Setup to Write End
Address Hold Time
Data Setup Time
Data Hold Time
OE to Data Valid
Address Access Time
TIMING PARAMETERS (ADSP-2161/ADSP-2163/ADSP-2165)
GENERAL NOTES
Use the exact timing information given. Do not attempt to de-
rive 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 sta-
tistical variations and worst cases. Consequently, you cannot
meaningfully add 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
REV. 0
ADSP-216x
Timing Parameter
t
t
t
t
t
t
t
ASW
AW
WRA
DW
DH
RDD
AA
–21–
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 cir-
cuitry external to the processor, such as the data input for a read
operation. Timing requirements guarantee that the processor
operates correctly with other devices.
MEMORY REQUIREMENTS
The table below shows common memory device specifications
and the corresponding ADSP-216x timing parameters, for your
convenience.
Timing Parameter Definition
A0–A13, DMS, PMS Setup Before WR Low
A0–A13, DMS, PMS Setup Before WR Deasserted
A0–A13, DMS, PMS Hold After WR Deasserted
Data Setup Before WR High
Data Hold After WR High
RD Low to Data Valid
A0–A13, DMS, PMS, BMS to Data Valid
ADSP-216x