DSP56156 View Datasheet(PDF) - Motorola => Freescale

Part Name

Description

Manufacturer

DSP56156

16-bit Digital Signal Processor

Motorola => Freescale 

EXTAL

Freescale Semiconductor, Inc.

TH

TL

7

8

6

4

2

AC Electrical Characteristics and Timing

Clock Operation Timing

PLL

VIHC

90%

Midpoint

10%

VILC

5

Figure 5 External Clock Timing

Other Clock and PLL Operation Timing

Clock and PLL timings are listed in Table 12 and the clocking configurations are illustrated in

Figure 6.

Table 12 Clock and PLL Timing

Characteristics

Min

Max

Unit

PLL Output frequency

10

Max Fosc

MHz

(See Note 1)

EXTAL Input Clock Amplitude (See Note 2)

1

VCC

Vpp

NOTES: 1. Maximum DSP operating frequency. See Table 11.

2. An AC coupling capacitor is required on EXTAL if the levels are out of the normal CMOS level

range (VILC>20% of VCC or VIHC<70% of VCC).

EXTAL 100 KΩ

1000 pF

CLKO

CS1-CS0

÷2

÷ 1 to ÷ 16

ED3-ED0

10 nF

XFC

0.01 µF

0.1 µF

SXFC

VCCS

GNDS

PFD LF

VCO

PLLE=1

Fosc

÷ 1 to ÷ 16

÷4

PLL

YD3-YD0

PLLE=0

GSM

÷ 6.5

CODEC

internal phase PH0 at Fosc

Figure 6 Clocking Configurations

MOTOROLA

DSP56156 Data Sheet

21

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