參數(shù)資料
型號: PSD4256G6V-10UIT
廠商: STMICROELECTRONICS
元件分類: 微控制器/微處理器
英文描述: 1M X 8 FLASH, 52 I/O, PIA-GENERAL PURPOSE, PQFP80
封裝: PLASTIC, TQFP-80
文件頁數(shù): 8/127頁
文件大小: 1091K
代理商: PSD4256G6V-10UIT
PSD4256G6V
DC and AC parameters
Table 56.
Example of PSD typical power calculation at VCC = 3.0 V (with Turbo mode On)
Conditions
Highest composite PLD input frequency
(Freq PLD)
= 8MHz
MCU ALE frequency (Freq ALE)
= 4MHz
% Flash memory Access
= 80%
% SRAM access
= 15%
% I/O access
= 5% (no additional power above base)
Operational modes
% Normal
= 10%
% Power-down mode
= 90%
Number of product terms used
(from fitter report)
= 54 PT
% of total product terms
= 54/217 = 25%
Turbo mode
= ON
Calculation (using typical values)
ICC total
= Ipwrdown x %pwrdown + %normal x (ICC (ac) + ICC (dc))
= Ipwrdown x %pwrdown + % normal x (%Flash x 1.2 mA/MHz x Freq ALE
+ %SRAM x 0.8 mA/MHz x Freq ALE
+ % PLD x 1.1 mA/MHz x Freq PLD
+ #PT x 200 A/PT)
= 50 A x 0.90 + 0.1 x (0.8 x 1.2 mA/MHz x 4MHz
+ 0.15 x 0.8 mA/MHz x 4MHz
+ 1.1 mA/MHz x 8MHz
+ 54 x 0.2 mA/PT)
= 45 A + 0.1 x (3.84 + 0.48 + 8.8 + 10.8 mA)
= 45 A + 0.1 x 23.92
= 45 A + 2.39 mA
= 2.43 mA
This is the operating power with no Flash memory Program or Erase cycles in progress. Calculation is based on
IOUT = 0 mA.
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