AT90PWM2 datasheet(321/365 Pages) ATMEL

321 / 365 page

321

AT90PWM2/3

4317B–AVR–02/05

AT90PWM2/3 Typical

Characteristics –

Preliminary Data

The following charts show typical behavior. These figures are not tested during manu-

facturing. All current consumption measurements are performed with all I/O pins

configured as inputs and with internal pull-ups enabled. A sine wave generator with rail-

to-rail output is used as clock source.

All Active- and Idle current consumption measurements are done with all bits in the PRR

Comparator is disabled during these measurements. Table 139 on page 327 and Table

140 on page 327 show the additional current consumption compared to I

CC Active and

CC Idle for every I/O module controlled by the Power Reduction Register. See “Power

Reduction Register” on page 37 for details.

The power consumption in Power-down mode is independent of clock selection.

The current consumption is a function of several factors such as: operating voltage,

operating frequency, loading of I/O pins, switching rate of I/O pins, code executed and

ambient temperature. The dominating factors are operating voltage and frequency.

The current drawn from capacitive loaded pins may be estimated (for one pin) as

L*VCC*f where CL = load capacitance, VCC = operating voltage and f = average switch-

ing frequency of I/O pin.

The parts are characterized at frequencies higher than test limits. Parts are not guaran-

teed to function properly at frequencies higher than the ordering code indicates.

The difference between current consumption in Power-down mode with Watchdog

Timer enabled and Power-down mode with Watchdog Timer disabled represents the dif-

ferential current drawn by the Watchdog Timer.

Active Supply Current

Figure 155. Active Supply Current vs. Frequency (0.1 - 1.0 MHz)

ACTIVE SUPPLY CURRENT vs. FREQUENCY

0.1 - 1.0 MHz

5.5 V

5.0 V

4.5 V

4.0 V

3.3 V

2.7 V

1.8 V

0.2

0.4

0.6

0.8

1.2

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

Frequency (MHz)

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