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MPC7445

RISC Microprocessor Hardware Specifications

Freescale Semiconductor 

Electrical and Thermal Characteristics

Table 7. Power Consumption for MPC7455 (continued)

Processor (CPU) Frequency

733 MHz 867 MHz 933 MHz 1 GHz

Unit Notes

Typical

7.6

7.6

7.6

7.6

W

1, 3

Deep Sleep Mode (PLL Disabled)

Typical

7.3

7.3

7.3

7.3

W

1, 3

Notes:

1. These values apply for all valid processor bus and L3 bus ratios. The values do not include I/O supply power (OVDD

and GVDD) or PLL supply power (AVDD). OVDD and GVDD power is system dependent, but is typically <5% of VDD

power. Worst case power consumption for AVDD < 3 mW.

2. Maximum power is measured at nominal VDD (see Table 4) while running an entirely cache-resident, contrived

sequence of instructions which keep the execution units, with or without AltiVec, maximally busy.

3. Typical power is an average value measured at the nominal recommended VDD (see Table 4) and 65°C in a system

while running a typical code sequence.

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.

5.2 AC Electrical Characteristics

This section provides the AC electrical characteristics for the MPC7455. After fabrication, functional parts are

sorted by maximum processor core frequency as shown in Section 5.2.1, “Clock AC Specifications,” and tested for

conformance to the AC specifications for that frequency. The processor core frequency is determined by the bus

(SYSCLK) frequency and the settings of the PLL_CFG[0:4] signals. Parts are sold by maximum processor core

frequency; see Section 11, “Ordering Information.”

5.2.1 Clock AC Specifications

Table 8 provides the clock AC timing specifications as defined in Figure 3.

Table 8. Clock AC Timing Specifications

At recommended operating conditions. See Table 4.

Maximum Processor Core Frequency

Characteristic

Symbol 733 MHz

867 MHz

933 MHz

1 GHz

Unit Notes

Min Max Min Max Min Max Min Max

Processor frequency

fcore 500 733 500 867 500 933 500 1000 MHz

1

VCO frequency

fVCO 1000 1466 1000 1734 1000 1866 1000 2000 MHz

1

SYSCLK frequency

fSYSCLK 33 133 33 133 33 133 33 133 MHz

1

SYSCLK cycle time

tSYSCLK 7.5 30 7.5 30 7.5 30 7.5 30

ns

SYSCLK rise and fall time tKR, tKF — 1.0 — 1.0 — 1.0 — 1.0

ns

2

SYSCLK duty cycle

tKHKL/ 40 60 40 60 40 60 40 60

%

3

measured at OVDD/2

tSYSCLK

MPC7455 RISC Microprocessor Hardware Specifications, Rev. 4.1

Freescale Semiconductor

15

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