DSP56300 View Datasheet(PDF) - Freescale Semiconductor

Part Name

Description

Manufacturer

DSP56300

24-Bit Digital Signal Processor

Freescale Semiconductor 

AC Electrical Characteristics

Table 2-3. DC Electrical Characteristics6 (Continued)

Characteristics

Symbol

Min

Typ

Max

Unit

Notes: 1. Refers to MODA/IRQA, MODB/IRQB, MODC/IRQC, and MODD/IRQD pins.

2. Section 4.3 provides a formula to compute the estimated current requirements in Normal mode. In order to obtain these

results, all inputs must be terminated (that is, not allowed to float). Measurements are based on synthetic intensive DSP

benchmarks (see Appendix A). The power consumption numbers in this specification are 90 percent 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 =

100°C.

3. In order to obtain these results, all inputs must be terminated (that is, not allowed to float).

4. In order to obtain these results, all inputs that are not disconnected at Stop mode must be terminated (that is, not allowed to

float). PLL and XTAL signals are disabled during Stop state.

5. Periodically sampled and not 100 percent tested.

6. VCC = 3.3 V ± 0.3 V; TJ = –40°C to +100 °C, CL = 50 pF

7. This characteristic does not apply to XTAL and PCAP.

8. Driving EXTAL to the low VIHX or the high VILX value may cause additional power consumption (DC current). To minimize

power consumption, the minimum VIHX should be no lower than

0.9 × VCC and the maximum VILX should be no higher than 0.1 × VCC.

2.5 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 6 of

the previous table. AC timing specifications, which are referenced to a device input signal, are measured in

production with respect to the 50 percent point of the respective input signal transition. DSP56309 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.

2.5.1 Internal Clocks

Table 2-4. Internal Clocks, CLKOUT

Characteristics

Symbol

Min

Expression1, 2

Typ

Internal operation frequency and CLKOUT

f

with PLL enabled

Internal operation frequency and CLKOUT

f

with PLL disabled

Internal clock and CLKOUT high period

• With PLL disabled

TH

• With PLL enabled and MF ≤4

• With PLL enabled and MF > 4

Internal clock and CLKOUT low period

• With PLL disabled

TL

• With PLL enabled and MF ≤4

• With PLL enabled and MF > 4

Internal clock and CLKOUT cycle time with

TC

PLL enabled

—

—

—

0.49 × ETC ×

PDF × DF/MF

0.47 × ETC ×

PDF × DF/MF

—

0.49 × ETC ×

PDF × DF/MF

0.47 × ETC ×

PDF × DF/MF

—

(Ef × MF)/

(PDF × DF)

Ef/2

ETC

—

—

ETC

—

—

ETC × PDF ×

DF/MF

Max

—

—

—

0.51 × ETC ×

PDF × DF/MF

0.53 × ETC ×

PDF × DF/MF

—

0.51 × ETC ×

PDF × DF/MF

0.53 × ETC ×

PDF × DF/MF

—

DSP56309 Technical Data, Rev. 7

Freescale Semiconductor

2-3

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