DSP56721 Freescale Semiconductor, Inc, DSP56721 Datasheet - Page 14

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

2.1.8
For reset, stop, mode select, and interrupt timing, see
14
No.
10
11
13
14
15
16
17
18
Delay from RESET assertion to all pins at reset value
Required RESET duration
Syn reset deassert delay time
Mode select setup time
Mode select hold time
Minimum edge-triggered interrupt request assertion width
Minimum edge-triggered interrupt request deassertion width
Delay from interrupt trigger to interrupt code execution
• Power on, external clock generator, PLL disabled
• Power on, external clock generator, PLL enabled
• Minimum
• Maximum (PLL enabled)
Notes:
No.
Reset, Stop, Mode Select, and Interrupt Timing
1
2
3
4
1.
2.
EXTAL input high
(40% to 60% duty cycle)
EXTAL input low
(40% to 60% duty cycle)
EXTAL cycle time
Instruction cycle time
Measured at 50% of the input transition.
The indicated duty cycle is for the specified maximum frequency for which a part is rated. The minimum clock
high or low time required for correct operation, however, remains the same at lower operating frequencies;
therefore, when a lower clock frequency is used, the signal symmetry may vary from the specified duty cycle
as long as the minimum high time and low time requirements are met.
• Crystal oscillator
• Square wave input
• Crystal oscillator
• Square wave input
• With PLL disabled
• With PLL enabled
• With PLL disabled
• With PLL enabled
Table 9. Reset, Stop, Mode Select, and Interrupt Timing Parameters
Symphony
Characteristics
4
TM
1
Characteristics
1
DSP56720 / DSP56721 Multi-Core Audio Processors, Rev. 3
Table 8. Clock Operation
Table
9.
Symbol
3
Eth
Etc
Etl
Tc
16.67
16.67
33.3
5.00
5.00
Min
2.5
2.5
5
(2 x T
Expression
10 × T
2 x T
2 x T
2 × T
C
) + T
—
—
—
—
—
C + 4
C
C
C
5120
Max
100
100
500
LOCK
inf
inf
inf
inf
Freescale Semiconductor
10.0
10.0
Min
200
—
10
10
10
54
4
4
Units
ns
ns
ns
ns
Max
11
—
—
—
—
—
—
—
—
—
Unit
ns
ns
ns
ns
us
ns
ns
ns
ns
ns