參數(shù)資料
型號(hào): PSD813F2A-15JI
廠商: STMICROELECTRONICS
元件分類: 微控制器/微處理器
英文描述: 128K X 8 FLASH, 27 I/O, PIA-GENERAL PURPOSE, PQCC52
封裝: PLASTIC, LCC-52
文件頁數(shù): 82/110頁
文件大?。?/td> 837K
代理商: PSD813F2A-15JI
73/110
PSD813F2, PSD833F2, PSD834F2, PSD853F2, PSD854F2
Table 36. Example of PSD Typical Power Calculation at VCC = 5.0V (Turbo Mode On)
Conditions
Highest Composite PLD input frequency
(Freq PLD)
= 8 MHz
MCU ALE frequency (Freq ALE)
= 4 MHz
% 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)
= 45 PT
% of total product terms
= 45/182 = 24.7%
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 2.5mA/MHz x Freq ALE
+ %SRAM x 1.5mA/MHz x Freq ALE
+ % PLD x 2mA/MHz x Freq PLD
+ #PT x 400A/PT)
= 50A x 0.90 + 0.1 x (0.8 x 2.5mA/MHz x 4 MHz
+ 0.15 x 1.5mA/MHz x 4 MHz
+ 2mA/MHz x 8 MHz
+ 45 x 0.4mA/PT)
= 45A + 0.1 x (8 + 0.9 + 16 + 18mA)
= 45A + 0.1 x 42.9
= 45A + 4.29mA
= 4.34mA
This is the operating power with no EEPROM WRITE or Flash memory Erase cycles in progress. Calculation is based
on IOUT = 0mA.
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