ADSP-21062/ADSP-21062L
POWER DISSIPATION ADSP-21062 (5 V)
These specifications apply to the internal power portion of VDD only. See the Power Dissipation section of this data sheet for calcula-
tion of external supply current and total supply current. For a complete discussion of the code used to measure power dissipation, see
the technical note “SHARC Power Dissipation Measurements.”
Specifications are based on the following operating scenarios:
Operation
Peak Activity (IDDINPEAK
)
High Activity (IDDINHIGH
)
Low Activity (IDDINLOW)
Instruction Type
Multifunction
Multifunction
Single Function
Instruction Fetch
Cache
Internal Memory
1 per Cycle (DM)
1 per 2 Cycles
Internal Memory
None
Core Memory Access
Internal Memory DMA
2 per Cycle (DM and PM)
1 per Cycle
1 per 2 Cycles
To estimate power consumption for a specific application, use the following equation where % is the amount of time your program
spends in that state:
%PEAK × IDDINPEAK + %HIGH × IDDINHIGH + %LOW × IDDINLOW + %IDLE × IDDIDLE = power consumption
Parameter
Test Conditions
Max
Units
IDDINPEAK
Supply Current (Internal)1
Supply Current (Internal)2
Supply Current (Internal)2
Supply Current (Idle)3
tCK = 30 ns, VDD = max
745
850
575
670
340
390
200
mA
mA
mA
mA
mA
mA
mA
t
CK = 25 ns, VDD = max
IDDINHIGH
IDDINLOW
tCK = 30 ns, VDD = max
tCK = 25 ns, VDD = max
tCK = 30 ns, VDD = max
t
CK = 25 ns, VDD = max
IDDIDLE
VDD = max
NOTES
1The test program used to measure IDDINPEAK represents worst case processor operation and is not sustainable under normal application conditions. Actual internal
power measurements made using typical applications are less than specified.
2IDDINHIGH is a composite average based on a range of high activity code. IDDINLOW is a composite average based on a range of low activity code.
3Idle denotes ADSP-21062L state during execution of IDLE instruction.
REV. C
–14–
ADI [ ADI ]
