Datasheet

ADSP-BF592
Rev. B | Page 19 of 44 | July 2013
Total Power Dissipation
Total power dissipation has two components:
1. Static, including leakage current
2. Dynamic, due to transistor switching characteristics
Many operating conditions can also affect power dissipation,
including temperature, voltage, operating frequency, and pro-
cessor activity. Electrical Characteristics on Page 18 shows the
current dissipation for internal circuitry (V
DDINT
). I
DDDEEPSLEEP
specifies static power dissipation as a function of voltage
(V
DDINT
) and temperature (see Table 12), and I
DDINT
specifies the
total power specification for the listed test conditions, including
the dynamic component as a function of voltage (V
DDINT
) and
frequency (Table 13).
There are two parts to the dynamic component. The first part is
due to transistor switching in the core clock (CCLK) domain.
This part is subject to an Activity Scaling Factor (ASF), which
represents application code running on the processor core and
L1 memories (Table 11).
The ASF is combined with the CCLK frequency and V
DDINT
dependent data in Table 13 to calculate this part. The second
part is due to transistor switching in the system clock (SCLK)
domain, which is included in the I
DDINT
specification equation.
Table 11. Activity Scaling Factors (ASF)
1
1
See Estimating Power for ASDP-BF534/BF536/BF537 Blackfin Processors
(EE-297). The power vector information also applies to the ADSP-BF592
processor.
I
DDINT
Power Vector Activity Scaling Factor (ASF)
I
DD-PEAK
1.29
I
DD-HIGH
1.26
I
DD-TYP
1.00
I
DD-APP
0.83
I
DD-NOP
0.66
I
DD-IDLE
0.33
Table 12. Static Current - I
DD-DEEPSLEEP
(mA)
T
J
(°C)
1
Voltage (V
DDINT
)
1
1.15 V 1.20 V 1.25 V 1.30 V 1.35 V 1.40 V 1.45 V 1.50 V
25 0.85 0.98 1.13 1.29 1.46 1.62 1.85 2.07
40 1.57 1.8 2.012.162.512.743.053.36
55 2.57 2.88 3.2 3.5 3.84 4.22 4.63 5.05
70 4.04 4.45 4.86 5.3 5.81 6.31 6.87 7.45
85 6.52 7.12 7.73 8.36 9.09 9.86 10.67 11.54
100 9.67 10.51 11.37 12.24 13.21 14.26 15.37 16.55
115 14.18 15.29 16.45 17.71 19.05 20.45 21.96 23.56
1
Valid temperature and voltage ranges are model-specific. See Operating Conditions on Page 16.
Table 13. Dynamic Current in CCLK Domain (mA, with ASF = 1.0)
1
f
CCLK
(MHz)
2
Voltage (V
DDINT
)
2
1.15 V 1.20 V 1.25 V 1.30 V 1.35 V 1.40 V 1.45 V 1.50 V
400 N/A N/A N/A N/A 85.31 88.96 92.81 96.63
350 N/A N/A N/A 72.08 75.41 78.70 82.07 85.46
300 N/A 57.52 60.38 63.22 66.14 69.02 71.93 75.05
250 46.10 48.43 50.76 53.19 55.68 58.17 60.69 63.23
200 37.86 39.80 41.76 43.79 45.81 47.85 49.97 52.09
100 21.45 22.56 23.78 24.98 25.97 26.64 27.92 29.98
1
The values are not guaranteed as stand-alone maximum specifications. They must be combined with static current per the equations of Electrical Characteristics on Page 18.
2
Valid frequency and voltage ranges are model-specific. See Operating Conditions on Page 16 and Table 8 on Page 17.