PSD913F2 datasheet(68/94 Pages) STMICROELECTRONICS

tên linh kiện	PSD913F2

Giải thích chi tiết về linh kiện	Flash In-System Programmable ISP Peripherals For 8-bit MCUs

PDF	94 Pages

Scroll/Zoom	100%

nhà sản xuất	STMICROELECTRONICS [STMicroelectronics]

Trang chủ	http://www.st.com

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PSD9XX Family

Preliminary Information

Conditions

Highest Composite PLD input frequency

(Freq PLD)

8 MHz

MCU ALE frequency (Freq ALE)

4 MHz

% Flash 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

45/153 = 29.4%

Turbo Mode

Calculation (typical numbers used)

ICC total = Ipwrdown x %pwrdown + %normal x (ICC (ac) + ICC (dc))

= Ipwrdown x %pwrdown + % normal x (%flash x 2.5 mA/MHz x Freq ALE

+ %SRAM x 1.5 mA/MHz x Freq ALE

+ % PLD x 2 mA/MHz x Freq PLD

+ #PT x 400 µA/PT

= 50 µA x 0.90 + 0.1 x (0.8 x 2.5 mA/MHz x 4 MHz

+ 0.15 x 1.5 mA/MHz x 4 MHz

+2 mA/MHz x 8 MHz

+ 45 x 0.4 mA/PT)

= 45 µA + 0.1 x (8 + 0.9 + 16 + 18 mA)

= 45 µA + 0.1 x 42.9

= 45 µA + 4.29 mA

= 4.34 mA

This is the operating power with no Flash writes or erases. Calculation is based

on IOUT = 0 mA.

Example of PSD9XX Typical Power Calculation at VCC = 5.0 V

AC/DC

Parameters

(cont.)

Figure 26a. PLD ICC /Frequency Consumption (PSD9XXFV Versions, VCC = 3 V)

VCC = 3V

010

TURBO

ON (100%)

TURBO

ON (25%)

TURBO

OFF

HIGHEST COMPOSITE FREQUENCY AT PLD INPUTS (MHz)

PT 100%

PT 25%

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