PSD4235G2 datasheet(65/89 Pages) STMICROELECTRONICS

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PSD4235G2

AC/DC PARAMETERS

These tables describe the AD and DC parameters

of the PSD4235G2:

t DC Electrical Specification

t AC Timing Specification

PLD Timing

– Combinatorial Timing

– Synchronous Clock Mode

– Asynchronous Clock Mode

– Input Macrocell Timing

MCU Timing

– Read Timing

–Write Timing

– Peripheral Mode Timing

– Power-down and 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 PSD

is in each mode. Also, the supply power is

considerably different if the Turbo bit is 0.

The AC power component gives the PLD, Flash

memory, and SRAM mA/MHz specification.

Figure 35 show the PLD mA/MHz as a function

of the number of Product Terms (PT) used.

In the PLD timing parameters, add the required

delay when Turbo bit is 0.

Figure 35. PLD ICC /Frequency Consumption

AI05739

100

110

HIGHEST COMPOSITE FREQUENCY AT PLD INPUTS (MHz)

PT 100%

PT 25%

Vcc = 5V

TURBO ON (100%)

TURBO ON (25%)

TURBO OFF

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