參數(shù)資料
型號: DSP56800ERM
廠商: 飛思卡爾半導(dǎo)體(中國)有限公司
英文描述: 16-bit Digital Signal Controllers
中文描述: 16位數(shù)字信號控制器
文件頁數(shù): 113/124頁
文件大小: 1880K
代理商: DSP56800ERM
Power Consumption
56F8013 Technical Data, Rev. 2
Freescale Semiconductor
Preliminary
113
where:
Summation is performed over all output pins with capacitive loads
TotalPower is expressed in mW
Cload is expressed in pF
Because of the low duty cycle on most device pins, power dissipation due to capacitive loads was found
to be fairly low when averaged over a period of time.
E, the external [static component], reflects the effects of placing resistive loads on the outputs of the
device. Sum the total of all V
2
/R or IV to arrive at the resistive load contribution to power. Assume V = 0.5
for the purposes of these rough calculations. For instance, if there is a total of eight PWM outputs driving
10mA into LEDs, then P = 8*.5*.01 = 40mW.
In previous discussions, power consumption due to parasitics associated with pure input pins is ignored,
as it is assumed to be negligible.
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