参数资料
型号: DSPB56724AG
厂商: Freescale Semiconductor
文件页数: 3/48页
文件大小: 0K
描述: DSP 24BIT AUD 250MHZ 144-LQFP
标准包装: 60
系列: DSP56K/Symphony
类型: 音频处理器
接口: 主机接口,I²C,SAI,SPI
时钟速率: 250MHz
非易失内存: 外部
芯片上RAM: 112kB
电压 - 输入/输出: 3.30V
电压 - 核心: 1.20V
工作温度: 0°C ~ 70°C
安装类型: 表面贴装
封装/外壳: 144-LQFP
供应商设备封装: 144-LQFP(20x20)
包装: 托盘
Symphony DSP56724/ DSP56725 Multi-Core Audio Processors, Rev. 2
Freescale Semiconductor
11
Table 6 lists the clock operation.
1.1.9
Reset, Stop, Mode Select, and Interrupt Timing
Table 7 lists the reset, stop, mode select, and interrupt timing.
Table 6. Clock Operation
No.
Characteristics
Symbol
Min
Max
Units
6
EXTAL input high 1
(40% to 60% duty cycle)
Crystal oscillator
Square wave input
Eth
16.67
2.5
100
inf
ns
7
EXTAL input low1
(40% to 60% duty cycle)
Crystal oscillator
Square wave input
Etl
16.67
2.5
100
inf
ns
8
EXTAL cycle time
With PLL disabled
With PLL enabled
Etc
5
33.3
inf
500
ns
9
Instruction cycle time
With PLL disabled
With PLL enabled
Tc
5
44
inf
5120
ns
Note:
1. Measured at 50% of the input transition.
2. 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.
3. Maximum frequency of 200 MHz supported at 0.95 V < VVDD_CORE < 1.05 V and –40 < Tj < 100° C
Maximum frequency of 250 MHz supported at 1.14 V < VVDD_CORE < 1.26 V and 0 < Tj < 90° C
4. PLLLOCK = 200 μs.
Table 7. Reset, Stop, Mode Select, and Interrupt Timing
No.
Characteristics
Expression
Min
Max
Unit
10
Delay from RESET assertion to all pins at reset value3
——
11
ns
11
Required RESET duration4
Power on, external clock generator, PLL disabled
Power on, external clock generator, PLL enabled
2
× TC
10
ns
2
× TC
10
ns
13
Syn reset deassert delay time
Minimum
2
× TC
10
ns
Maximum (PLL enabled)
(2xTC)+PLLLOCK
200
us
14
Mode select setup time
10
ns
15
Mode select hold time
12
ns
16
Minimum edge-triggered interrupt request assertion width
7
ns
17
Minimum edge-triggered interrupt request deassertion width
4
ns
18
Delay from interrupt trigger to interrupt code execution
10
× TC + 4
54
ns
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