AT90PWM2 datasheet(309/361 Pages) ATMEL

309 / 361 page

309

4317J–AVR–08/10

AT90PWM2/3/2B/3B

Notes:

tWLRH is valid for the Write Flash, Write EEPROM, Write Fuse bits and Write Lock bits

commands.

tWLRH_CE is valid for the Chip Erase command.

27. AT90PWM2/2B/3/3B Typical Characteristics

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

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 register

set and thus, the corresponding I/O modules are turned off. Also the Analog Comparator is dis-

abled during these measurements. Table 27-1 on page 314 and Table 27-2 on page 314 show

the additional current consumption compared to I

CC Active and ICC Idle for every I/O module con-

trolled 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 tempera-

ture. The dominating factors are operating voltage and frequency.

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

L*VCC*f where

L = load capacitance, VCC = operating voltage and f = average switching frequency of I/O pin.

The parts are characterized at frequencies higher than test limits. Parts are not guaranteed 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 differential cur-

rent drawn by the Watchdog Timer.

tXLOL

XTAL1 Low to OE Low

tBVDV

BS1 Valid to DATA valid

250

tOLDV

OE Low to DATA Valid

250

tOHDZ

OE High to DATA Tri-stated

250

Table 26-6.

Parallel Programming Characteristics, V

CC = 5V ± 10% (Continued)

Symbol

Parameter

Min.

Typ.

Max.

Units

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