参数资料
型号: DSP56311VF150R2
厂商: Freescale Semiconductor
文件页数: 19/96页
文件大小: 0K
描述: IC DSP 24BIT 150MHZ 196-BGA
标准包装: 750
系列: DSP56K/Symphony
类型: 定点
接口: 主机接口,SSI,SCI
时钟速率: 150MHz
非易失内存: ROM(576 B)
芯片上RAM: 384kB
电压 - 输入/输出: 3.30V
电压 - 核心: 1.80V
工作温度: -40°C ~ 100°C
安装类型: 表面贴装
封装/外壳: 196-LBGA
供应商设备封装: 196-MAPBGA(15x15)
包装: 带卷 (TR)
DSP56311 Technical Data, Rev. 8
2-6
Freescale Semiconductor
Specifications
2.4.3
Phase Lock Loop (PLL) Characteristics
Table 2-5.
Clock Operation
No.
Characteristics
Symbol
150 MHz
Min
Max
1
Frequency of EXTAL (EXTAL Pin Frequency)
The rise and fall time of this external clock should be 3 ns maximum.
Ef
0
150.0
2
EXTAL input high1, 2
With PLL disabled (46.7%–53.3% duty cycle
6)
With PLL enabled (42.5%–57.5% duty cycle6)
ETH
3.11 ns
2.83 ns
157.0
s
3
EXTAL input low1, 2
With PLL disabled (46.7%–53.3% duty cycle
6)
With PLL enabled (42.5%–57.5% duty cycle6)
ETL
3.11 ns
2.83 ns
157.0
s
4
EXTAL cycle time
2
With PLL disabled
With PLL enabled
ETC
6.67 ns
273.1
s
5
Internal clock change from EXTAL fall with PLL disabled
4.3 ns
11.0 ns
6
a.Internal clock rising edge from EXTAL rising edge with PLL enabled (MF = 1 or 2 or
4, PDF = 1, Ef > 15 MHz)
3,5
b. Internal clock falling edge from EXTAL falling edge with PLL enabled (MF
≤4, PDF
≠ 1, Ef / PDF > 15 MHz)3,5
0.0 ns
1.8 ns
7
Instruction cycle time = ICYC = TC
4
(see Figure 2-4) (46.7%–53.3% duty cycle)
With PLL disabled
With PLL enabled
ICYC
13.33 ns
6.7 ns
8.53
s
Notes:
1.
Measured at 50 percent of the input transition.
2.
The maximum value for PLL enabled is given for minimum VCO frequency (see Table 2-4) and maximum MF.
3.
Periodically sampled and not 100 percent tested.
4.
The maximum value for PLL enabled is given for minimum VCO frequency and maximum DF.
5.
The skew is not guaranteed for any other MF value.
6.
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 correction 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.
Table 2-6.
PLL Characteristics
Characteristics
150 MHz
Unit
Min
Max
Voltage Controlled Oscillator (VCO) frequency when PLL enabled
(MF
× Ef × 2/PDF)
30
300
MHz
PLL external capacitor (PCAP pin to VCCP) (CPCAP
1)
@ MF
≤4
@ MF > 4
(580
× MF) 100
830 × MF
(780
× MF) 140
1470
× MF
pF
Note:
CPCAP is the value of the PLL capacitor (connected between the PCAP pin and VCCP) computed using the appropriate expression
listed above.
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