DSP56366 Просмотр технического описания (PDF) - Freescale Semiconductor

Номер в каталоге

Компоненты Описание

производитель

DSP56366

24-Bit Audio Digital Signal Processor

Freescale Semiconductor 

6 Appendix A, "Power Consumption Benchmark" provides a formula to compute the estimated current requirements

in Normal mode. In order to obtain these results, all inputs must be terminated (i.e., not allowed to float). Measurements are

based on synthetic intensive DSP benchmarks. The power consumption numbers in this specification are 90% of the

measured results of this benchmark. This reflects typical DSP applications. Typical internal supply current is measured with

VCC = 3.3 V at

TJ = 110°C. Maximum internal supply current is measured with VCC = 3.46 V at TJ = 110°C.

7 In order to obtain these results, all inputs, which are not disconnected at Stop mode, must be terminated (i.e., not allowed to

float).

3.5 AC Electrical Characteristics

The timing waveforms shown in the AC electrical characteristics section are tested with a VIL maximum

of 0.3 V and a VIH minimum of 2.4 V for all pins except EXTAL, which is tested using the input levels

shown in Note 3 of the previous table. AC timing specifications, which are referenced to a device input

signal, are measured in production with respect to the 50% point of the respective input signal’s transition.

DSP56366 output levels are measured with the production test machine VOL and VOH reference levels set

at 0.4 V and 2.4 V, respectively.

NOTE

Although the minimum value for the frequency of EXTAL is 0 MHz, the

device AC test conditions are 15 MHz and rated speed.

3.6 Internal Clocks

Characteristics

Internal operation frequency with PLL

enabled

Internal operation frequency with PLL

disabled

Internal clock high period

• With PLL disabled

• With PLL enabled and MF ≤ 4

• With PLL enabled and MF > 4

Internal clock low period

• With PLL disabled

• With PLL enabled and MF ≤ 4

• With PLL enabled and MF > 4

Internal clock cycle time with PLL

enabled

Table 3-4 Internal Clocks

Expression1, 2

Symbol

Min

Typ

Max

f

—

(Ef × MF)/(PDF × DF)

—

f

—

Ef/2

—

TH

—

ETC

—

0.49 × ETC × PDF ×

—

0.51 × ETC × PDF ×

DF/MF

DF/MF

0.47 × ETC × PDF ×

—

0.53 × ETC × PDF ×

DF/MF

DF/MF

TL

—

ETC

—

0.49 × ETC × PDF ×

—

0.51 × ETC × PDF ×

DF/MF

DF/MF

0.47 × ETC × PDF ×

—

0.53 × ETC × PDF ×

DF/MF

DF/MF

TC

—

ETC × PDF × DF/MF

—

DSP56366 Technical Data, Rev. 3.1

3-4

Freescale Semiconductor

Share Link: