Datasheet

Rev. D | Page 18 of 52 | May 2013
ADSP-21061/ADSP-21061L
INTERNAL POWER DISSIPATION (3.3 V)
These specifications apply to the internal power portion of V
DD
only. See the Power Dissipation section of this data sheet for cal-
culation of external supply current and total supply current. For
a complete discussion of the code used to measure power dissi-
pation, see the technical note “SHARC Power Dissipation
Measurements.”
Specifications are based on the operating scenarios:
To estimate power consumption for a specific application, use
the following equation where % is the amount of time your pro-
gram spends in that state:
%PEAK I
DDINPEAK
+ %HIGH I
DDINHIGH
+ %LOW I
DDINLOW
+ %IDLE
I
DDIDLE
= power consumption
Operation Peak Activity (I
DDINPEAK
) High Activity (I
DDINHIGH
) Low Activity (I
DDINLOW
)
Instruction Type Multifunction Multifunction Single Function
Instruction Fetch Cache Internal Memory Internal Memory
Core memory Access 2 per Cycle (DM and PM) 1 per Cycle (DM) None
Internal Memory DMA 1 per Cycle 1 per 2 Cycles 1 per 2 Cycles
Parameter Test Conditions Max Unit
I
DDINPEAK
Supply Current (Internal)
1
t
CK
= 25 ns, V
DD
= Max
t
CK
= 22.5 ns, V
DD
= Max
480
535
mA
mA
I
DDINHIGH
Supply Current (Internal)
2
t
CK
= 25 ns, V
DD
= Max
t
CK
= 22.5 ns, V
DD
= Max
380
425
mA
mA
I
DDINLOW
Supply Current (Internal)
3
t
CK
= 25 ns, V
DD
= Max
t
CK
= 22.5 ns, V
DD
= Max
220
245
mA
mA
I
DDIDLE
Supply Current (Idle)
4
I
DDIDLE
Supply Current (Idle)
5
V
DD
= Max
V
DD
= Max
180
50
mA
mA
1
The test program used to measure I
DDINPEAK
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.
2
I
DDINHIGH
is a composite average based on a range of high activity code. I
DDINLOW
is a composite average based on a range of low activity code.
3
IDDINLOW
is a composite average based on a range of low activity code.
4
Idle denotes ADSP-21061L state during execution of IDLE instruction.
5
Idle16 denotes ADSP-21061L state during execution of IDLE16 instruction.