DSM2190F4V datasheet(42/61 Pages) STMICROELECTRONICS

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DSM2190F4

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AC/DC PARAMETERS

These tables describe the AC and DC parameters

of the device:

t DC Electrical Specification

t AC Timing Specification

PLD Timing

– Combinatorial Timing

– Synchronous Clock Mode

– Asynchronous Clock Mode

– Input Macrocell Timing

DSP Timing

– Read Timing

–Write Timing

– Reset Timing

The following are issues concerning the parame-

ters presented:

In the DC specification the supply current is

given for different modes of operation. Before

calculating the total power consumption,

determine the percentage of time that the

device is in each mode. Also, the supply power

is considerably different if the Turbo bit is 0.

The AC power component gives the PLD and

Flash memory a mA/MHz specification. Figure

25 shows the PLD mA/MHz as a function of the

number of Product Terms (PT) used.

The fitter report of PSDsoft Express indicates

the number of Product Terms (PTs) used for a

given design. This number may be used to

estimate PLD power consumption using Figure

25.

In the PLD timing parameters, add the required

delay when Turbo bit is 0.

Figure 25. PLD ICC /Frequency Consumption (3.3 V)

VCC = 3V

010

TURBO

ON (100%)

TURBO

ON (25%)

TURBO

OFF

HIGHEST COMPOSITE FREQUENCY AT PLD INPUTS (MHz)

PT 100%

PT 25%

AI03100

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