Z Microsystems ZX3 Manual de usuario descargar pdf (Pagina 36)

36 Altera Corporation

MAX 9000 Programmable Logic Device Family Data Sheet

The parameters in this equation are shown below:

TON

= Number of macrocells with the Turbo Bit option turned on,

as reported in the MAX+PLUS II Report File (.rpt)

DEV

= Number of macrocells in the device

USED

= Number of macrocells used in the design, as reported in the

MAX+PLUS II Report File

MAX

= Highest clock frequency to the device

tog

= Average percentage of logic cells toggling at each clock

(typically 12.5%)

A, B, C = Constants, shown in Table 25

This calculation provides an I

estimate based on typical conditions with

no output load, using a typical pattern of a 16-bit, loadable, enabled

up/down counter in each LAB. Actual I

values should be verified

during operation, because the measurement is sensitive to the actual

pattern in the device and the environmental operating conditions.

Figure 15 shows typical supply current versus frequency for MAX 9000

devices.

Table 25. MAX 9000 I

Equation Constants

Device Constant A Constant B Constant C

EPM9320 0.81 0.33 0.056

EPM9320A 0.56 0.31 0.024

EPM9400 0.60 0.33 0.053

EPM9480 0.68 0.29 0.064

EPM9560 0.68 0.26 0.052

EPM9560A 0.56 0.31 0.024

1 2 ... 31 32 33 34 35 36 37 38 39 40 41 ... 45 46

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Z Microsystems ZX3 Manual de usuario Pagina 36