MPC7457 datasheet(16/71 Pages) FREESCALE

16 / 71 page

MPC7457 RISC Microprocessor Hardware Specifications, Rev. 8

Electrical and Thermal Characteristics

Freescale Semiconductor

Table 7 provides the power consumption for the MPC7457.

Capacitance,

Vin = 0 V, f = 1 MHz

L3 interface

—

Cin

—9.5

All other inputs

—

8.0

Notes:

1. Nominal voltages; see Table 4 for recommended operating conditions.

2. For processor bus signals, the reference is OVDD while GVDD is the reference for the L3 bus signals.

3. Excludes test signals and IEEE 1149.1 boundary scan (JTAG) signals.

4. The leakage is measured for nominal OVDD/GVDD and VDD, or both OVDD/GVDD and VDD must vary in the same direction

(for example, both OVDD and VDD vary by either +5% or –5%).

5. Capacitance is periodically sampled rather than 100% tested.

6. Applicable to L3 bus interface only.

Table 7. Power Consumption for MPC7457

Processor (CPU) Frequency

Unit

Notes

867 MHz

1000 MHz

1200 MHz

1267 MHz

Full-Power Mode

Typical

14.8

15.8

17.5

18.3

1, 2

Maximum

21.0

22.0

24.2

25.6

1, 3

Nap Mode

Typical

5.2

1, 2

Sleep Mode

Typical

5.1

1, 2

Deep Sleep Mode (PLL Disabled)

Typical

5.0

1, 2

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. Typical power is an average value measured at the nominal recommended VDD (see Table 4) 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 VDD and maximum operating junction temperature (see Table 4) 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.

Table 6. DC Electrical Specifications (continued)

At recommended operating conditions. See Table 4.

Characteristic

Nominal

Bus

Voltage 1

Symbol

Min

Max

Unit

Notes

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