DSPB56724AG Freescale Semiconductor, DSPB56724AG Datasheet - Page 10

• Manufacturer Part Number: DSPB56724AG
• Description: DSP 24BIT AUD 250MHZ 144-LQFP
• Manufacturer: Freescale Semiconductor
• Series: Symphony™r
• Type: Audio Processorr

Specifications of DSPB56724AG

• Interface: Host Interface, I²C, SAI, SPI
• Clock Rate: 250MHz
• Non-volatile Memory: External
• On-chip Ram: 112kB
• Voltage - I/o: 3.30V
• Voltage - Core: 1.20V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 144-LQFP
• Operating Temperature (min): 0C
• Operating Temperature (max): 70C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 144
• Package Type: LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

1.1.8
The DSP56724/DSP56725 system clock is derived from the on-chip oscillator or is externally supplied. To use the on-chip
oscillator, connect a crystal and associated resistor/capacitor components to EXTAL and XTAL; see
If the DSP56724/DSP56725 system clock is an externally supplied square wave voltage source, it is connected to EXTAL
(Figure
10
Note:
1. Fin = External frequency
2. Maximum frequency of 200 MHz supported at 0.95 V < V
No.
3
4
5
NF = Multiplication Factor
NR = Predivision Factor
NO = Output Divider
DF = Division Factor
Maximum frequency of 250 MHz supported at 1.14 V < V
PLL VCO Frequency
Output Clock Frequency
System Clock Frequency
7). When the external square wave source is connected to EXTAL, the XTAL pin is not used.
• with PLL enabled
• with PLL disabled
• with PLL enabled
• with PLL disabled
C
Note:
EXTAL
External Clock Operation
EXTAL
Characteristics
The midpoint is 0.5 (V
XTAL1
Symphony
R
[2]
V
IL
[1] [2]
XTAL
Eth
™
C
DSP56724/ DSP56725 Multi-Core Audio Processors, Rev. 2
6
Figure 6. Using the On-Chip Oscillator
Table 5. Internal Clocks (Continued)
Symbol
IH
Fvco
Fsys
Figure 7. External Clock Timing
Fout
Suggested component values:
f
R = 1 M ±10%
C (EXTAL)= 18 pF
C (XTAL) = 18 pF
Calculations are for a 5–30 MHz crystal with the following parameters:
• shunt capacitance (C
• series resistance 40 Ohm
• drive level of 10 μW
osc = 24.576 MHz
+ V
8
Etl
IL
).
0.195
7
Etc
Min
200
25
—
0
VDD_CORE
VDD_CORE
Typ
0
—
—
—
) of 10 pq–F12 pF
< 1.05 V and –40 < Tj < 100° C
< 1.26 V and 0 < Tj < 90° C
200 or 250
200 or 250
200 or 250
Max
500
200
Midpoint
MHz
Unit
MHz
MHz
V
Fvco = (Fin * NF)/NR
Fout = Fvco/NO
Fout = Fin
Fsys = Fout/2
Fsys = Fout
IH
Figure
Freescale Semiconductor
Condition
6.
DF