MPC755 datasheet(12/56 Pages) MOTOROLA

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MPC755 RISC Microprocessor Hardware Specifications, Rev. 6.1

Freescale Semiconductor

Electrical and Thermal Characteristics

Table 7 provides the power consumption for the MPC755.

Capacitance, Vin = 0 V, f = 1 MHz

Cin

—

5.0

3, 4

Notes:

1. Nominal voltages; see Table 3 for recommended operating conditions.

2. For processor bus signals, the reference is OVDD while L2OVDD is the reference for the L2 bus signals.

3. Excludes test signals (LSSD_MODE, L1_TSTCLK, L2_TSTCLK) and IEEE 1149.1 boundary scan (JTAG) signals.

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

5. The leakage is measured for nominal OVDD and VDD, or both OVDD and VDD must vary in the same direction (for example, both OVDD and

VDD vary by either +5% or –5%).

Table 7. Power Consumption for MPC755

Processor (CPU) Frequency

Unit

Notes

300 MHz

350 MHz

400 MHz

Full-Power Mode

Typical

3.1

3.6

5.4

1, 3, 4

Maximum

4.5

5.3

8.0

1, 2

Doze Mode

Maximum

1.8

2.0

2.3

1, 2, 4

Nap Mode

Maximum

1.0

1, 2, 4

Sleep Mode

Maximum

550

1, 2, 4

Sleep Mode (PLL and DLL Disabled)

Maximum

510

1, 2

Notes:

1. These values apply for all valid processor bus and L2 bus ratios. The values do not include I/O supply power (OVDD and L2OVDD) or PLL/DLL

supply power (AVDD and L2AVDD). OVDD and L2OVDD power is system dependent, but is typically <10% of VDD power. Worst case power

consumption for AVDD = 15 mW and L2AVDD =15 mW.

2. Maximum power is measured at nominal VDD (see Table 3) while running an entirely cache-resident, contrived sequence of instructions

which keep the execution units maximally busy.

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

code sequence.

4. Not 100% tested. Characterized and periodically sampled.

Table 6. DC Electrical Specifications (continued)

At recommended operating conditions (see Table 3)

Characteristic

Nominal

Bus Voltage

Symbol

Min

Max

Unit

Notes

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