PC8245 datasheet(22/61 Pages) ATMEL

22 / 61 page

PC8245

2171D–HIREL–06/04

Power Characteristics

Table 3 provides power consumption data for the PC8245.

Notes:

1. The values include VDD, AVDD, and AVDD2 but do not include I/O supply power, see Section “Power Supply Sizing” on page

49, for information on OV

DD and GVDD supply power. Values shown in parenthesis ( ) indicate power consumption at

DD/AVDD/AVDD2 = 1.8V

2. Maximum – FP power is measured at VDD = 2.1V with dynamic power management enabled while running an entirely cache-

resident, looping, floating-point multiplication instruction.

3. Maximum – INT power is measured at V

DD = 2.1V with dynamic power management enabled while running entirely cache-

resident, looping, integer instructions.

4. Power saving mode maximums are measured at V

DD = 2.1V while the device is in doze, nap, or sleep mode.

5. Typical power is measured at V

DD = AVDD = 2.0V, OVDD = 3.3V where a nominal FP value, a nominal INT value, and a value

where there is a continuous flush of cache lines with alternating ones and zeros on 64-bit boundaries to local memory are

averaged.

6. Power saving mode data measured with only two PCI_CLKs and two SDRAM_CLKs enabled

7. The typical minimum I/O power values were results of the PC8245 performing cache resident integer operations at the slow-

est frequency combination of 33:66:200 (PCI:Mem:CPU) MHz

8. The typical maximum OV

DD value resulted from the PC8245 operating at the fastest frequency combination of 66:100:350

(PCI:Mem:CPU) MHz and performing continuous flushes of cache lines with alternating ones and zeros to PCI memory.

9. The typical maximum GV

DD value resulted from the PC8245 operating at the fastest frequency combination of 66:100:350

(PCI:Mem:CPU) MHz and performing continuous flushes of cache lines with alternating ones and zeros on 64-bit bound-

aries to local memory.

10. Power consumption of PLL supply pins (AV

DD and AVDD2) < 15 mW. Guaranteed by design and is not tested.

Table 3. Power Consumption

Mode

PCI Bus Clock/Memory Bus Clock

CPU Clock Frequency (MHz)

Unit

Notes

66/66/266

66/133/266

66/66/300

66/100/300

33/83/333

66/133/333

Typical

1.7

(1.5)

2.0

(1.8)

1.8

(1.7)

2.0

(1.8)

2.0

2.3

(1)(5)

Max – FP

2.2

(1.9)

2.4

(2.1)

2.3

(2.))

2.5

(2.2)

2.6

2.8

(1)(2)

Max – INT

1.8

(1.6)

2.1

(1.8)

2.0

(1.8)

2.1

(1.8)

2.2

2.4

(1)(3)

Doze

1.1

(1.0)

1.4

(1.3)

1.2

(1.1)

1.4

(1.3)

1.4

1.6

(1)(4)(6)

Nap

0.4

(0.4)

0.7

(0.7)

0.4

(0.4)

0.6

(0.6)

0.5

0.7

(1)(4)(6)

Sleep

0.2

(0.2)

0.4

(0.4)

0.2

(0.4)

0.3

(0.3)

0.3

0.4

(1)(4)(6)

I/O Power Supplies(10)

Mode

Minimum

Maximum

Unit

Notes

Typ – OV

134 (121)

334 (301)

(7)(8)

Typ – GV

324 (292)

800 (720)

(7)(9)

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