PSD4235G2V-10UI datasheet(79/100 Pages) STMICROELECTRONICS

tên linh kiện	PSD4235G2V-10UI

Giải thích chi tiết về linh kiện	Flash In-System Programmable (ISP) Peripherals for 16-bit MCUs

PDF	100 Pages

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nhà sản xuất	STMICROELECTRONICS [STMicroelectronics]

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PSD4256G6V

This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to change without notice.

Table 54. Example of PSD Typical Power Calculation at VCC = 3.0V (with Turbo Mode Off)

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)

= 54 PT

% of total product terms

= 54/217 = 25%

Turbo Mode

= Off

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 (from graph using Freq PLD))

= 50 µA x 0.90 + 0.1 x (0.8 x 1.2 mA/MHz x 4 MHz

+ 0.15 x 0.8 mA/MHz x 4 MHz

+ 15 mA)

= 45 µA + 0.1 x (3.84 + 0.48 + 15)

= 45 µA + 0.1 x 18.84

= 45 µA + 1.94 mA

= 1.98 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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