PC7447A Datasheet, PDF (19/44 Pages) ATMEL Corporation – PowerPC RISC microprocessor

PC7447A [Preliminary]
6.4.4.6
Minimum Core Frequency Requirements with DFS
In many systems, enabling DFS can result in very low processor core frequencies. However,
care must be taken to ensure that the resulting processor core frequency is within the limits
specified in Table 9-2 on page 25. Proper operation of the device is not guaranteed at core fre-
quencies below the specified minimum f_core.
6.4.5
Power Consumption
Table 7 provides the power consumption for the PC7447A. For information regarding power
consumption when dynamic frequency switching is enabled, See “Dynamic Frequency Switch-
ing (DFS)” on page 17..
Table 6-6. Power Consumption for PC7447A
Processor (CPU) Frequency
1000
1167
1267
1333⁽⁵⁾
1420
Unit
Full-Power Mode
Core Power Supply
Typical⁽¹⁾⁽²⁾
Maximum⁽¹⁾⁽³⁾
1.1
1.1
1.3
1.3
1.3
8
9.2
18.3
18
21
W
26
25
30
W
Nap Mode
Typical⁽¹⁾⁽²⁾
11.5
13
1.3
1.3
4.1
3.3
4.1
W
Sleep Mode
Typical⁽¹⁾⁽²⁾
1.3
1.3
4.1
3.3
4.1
W
Deep Sleep Mode (PLL Disabled)
Typical⁽¹⁾⁽²⁾
1.2
1.2
4
3.2
4
W
Notes:
1. These values apply for all valid processor buses. 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 V_DD power. Worst case power consumption for AVDD <
3 mW.
2. Typical power is an average value measured at the nominal recommended V_DD (see Table 6-2 on page 10) and 65°C while
running the Dhrystone 2.1 benchmark and achieving 2.3 Dhrystone MIPs/MHz
3. Maximum power is the average measured at nominal V_DD and maximum operating junction temperature (see Table 6-2 on
page 10) while running an entirely cache-resident, contrived sequence of instructions which 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. Power consumption for these devices is artificially constrained during screening to assure lower power consumption than
other speed grades.
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5387B–HIREL–07/05