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MPC7447 Datasheet PDF : 60 Pages
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Electrical and Thermal Characteristics
when running a typical benchmark at temperatures in a typical system. The Full-Power Mode–Thermal
value is intended to represent the sustained power consumption of the device when running a typical code
sequence at high temperature and is recommended to be used as the basis for designing a thermal solution;
see Section 9.7, “Power and Thermal Management Information” for more information on thermal
solutions. The Full-Power Mode–Maximum value is recommended to be used for power supply design
because this represents the maximum peak power draw of the device that a power supply must be capable
of sourcing without voltage droop. For information on power consumption when dynamic frequency
switching is enabled, see Section 9.7.5, “Dynamic Frequency Switching (DFS).”
Table 7. Power Consumption for MPC7448 at Maximum Rated Frequency
Die Junction
Temperature
(Tj)
Maximum Processor Core Frequency (Speed Grade, MHz)
1000 MHz
1420 MHz
1600 MHz
1700 MHz
Unit
Notes
Full-Power Mode
Typical
65 •C
15.0
19.0
20.0
21.0
W
1, 2
Thermal
105 •C
18.6
23.3
24.4
25.6
W
1, 5
Maximum
105 •C
21.6
27.1
28.4
29.8
W
1, 3
Nap Mode
Typical
Typical
105 •C
11.1
105 •C
10.8
11.8
13.0
Sleep Mode
11.4
12.5
13.0
12.5
W
1, 6
W
1, 6
Deep Sleep Mode (PLL Disabled)
Typical
105 •C
10.4
11.0
12.0
12.0
W
1, 6
Notes:
1. These values specify the power consumption for the core power supply (VDD) at nominal voltage and apply to all valid
processor bus frequencies and configurations. The values do not include I/O supply power (OVDD) or PLL supply power
(AVDD). OVDD power is system dependent but is typically < 5% of VDD power. Worst case power consumption for
AVDD < 13 mW. Freescale also offers MPC7448 part numbers that meet lower power consumption specifications; for
more information on these devices, see Section 11.2, “Part Numbers Not Fully Addressed by This Document.”
2. Typical power consumption is an average value measured with the processor operating at its rated maximum processor
core frequency (except for Deep Sleep Mode), at nominal recommended VDD (see Table 4) and 65°C while running the
Dhrystone 2.1 benchmark and achieving 2.3 Dhrystone MIPs/MHz. This parameter is not 100% tested but periodically
sampled.b
3. Maximum power consumption is the average measured with the processor operating at its rated maximum processor core
frequency, at nominal VDD and maximum operating junction temperature (see Table 4) while running an entirely
cache-resident, contrived sequence of instructions to keep all the execution units maximally busy.
4. Doze mode is not a user-definable state; it is an intermediate state between full-power and either nap or sleep mode. As
a result, power consumption for this mode is not tested.
5. Thermal power consumption is an average value measured at the nominal recommended VDD (see Table 4) and 105 °C
while running the Dhrystone 2.1 benchmark and achieving 2.3 Dhrystone MIPs/MHz. This parameter is not 100% tested
but periodically sampled.
6. Typical power consumption for these modes is measured at the nominal recommended VDD (see Table 4) and 105 °C in
the mode described. This parameter is not 100% tested but is periodically sampled.
MPC7448 RISC Microprocessor Hardware Specifications, Rev. 4
14
Freescale Semiconductor
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