DSP56721 Freescale Semiconductor, Inc, DSP56721 Datasheet - Page 12

• Manufacturer Part Number: DSP56721
• Description: Dsp56721 Multi-core Audio Processor
• Manufacturer: Freescale Semiconductor, Inc

2.1.5
The timing waveforms shown in the AC electrical characteristics section are tested with a V
minimum of 2.0 V for all pins. 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. DSP56720/DSP56721 output levels are
measured with the production test machine V
2.1.6
Internal clock characteristics are listed in
12
Notes:
Fin = External frequency, NF = Multiplication Factor, NR = Predivision Factor, NO = Output Divider
No.
Internal supply current
200 MHz
Input capacitance
Notes:
1
2
3
4
5
• In Normal mode
• In Wait mode
• In Stop mode
1.
2.
Comparison Frequency
Input Clock Frequency
PLL VCO Frequency
Output Clock Frequency
Duty Cycle
• with PLL enabled
• with PLL disabled
The Current Consumption section 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 V
Maximum internal supply current is measured with V
In order to obtain these results, all inputs, which are not disconnected at Stop mode, must be terminated (i.e., not allowed to float).
AC Electrical Characteristics
Internal Clocks
Characteristics
2
Characteristics
Symphony
1
(core only) at internal clock of
[1]
Table 6. DC Electrical Characteristics (Continued)
TM
DSP56720 / DSP56721 Multi-Core Audio Processors, Rev. 3
Symbol
Table
Fvco
Fout
Fref
Fin
—
OL
7.
and V
Table 7. Internal Clocks
OH
Min
200
25
—
40
2
CORE_VDD
reference levels set at 0.4 V and 2.4 V, respectively.
Symbol
I
I
I
CCW
C
CCS
CCI
IN
= 1.10V, V
Max = 200 MHz
Typ
50
—
—
—
Min
—
—
—
—
IO_VDD)
= 3.6V at T
CORE_VDD
Max
400
200
200
60
8
Typ
190
90
50
—
MHz
MHz
MHz
IL
Unit
= 1.0V, V
%
J
maximum of 0.8 V and a V
= 125°C.
Fref = Fin/NR
Fout= Fvco/NO
Fout = Fin
Fvco=
200 MHz–400 MHz
Fvco = (Fin * NF)/NR
DD_IO
Freescale Semiconductor
Max
= 3.3V at T
780
680
640
10
Condition
J
= 25°C.
Unit
mA
mA
mA
pF
IH