參數(shù)資料
型號: SPAKDSP321VL240
廠商: Freescale Semiconductor
文件頁數(shù): 17/84頁
文件大小: 0K
描述: IC DSP 24BIT 240MHZ 196-MAPBGA
標(biāo)準(zhǔn)包裝: 2
系列: DSP56K/Symphony
類型: 定點(diǎn)
接口: 主機(jī)接口,SSI,SCI
時(shí)鐘速率: 240MHz
非易失內(nèi)存: ROM(576 B)
芯片上RAM: 576kB
電壓 - 輸入/輸出: 3.30V
電壓 - 核心: 1.60V
工作溫度: -40°C ~ 100°C
安裝類型: 表面貼裝
封裝/外殼: 196-LBGA
供應(yīng)商設(shè)備封裝: 196-MAPBGA(15x15)
包裝: 托盤
DSP56321 Technical Data, Rev. 11
2-4
Freescale Semiconductor
Specifications
2.4.2
External Clock Operation
The DSP56321 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; an example is
shown in Figure 2-1.
Internal clock low period
With DPLL disabled
With DPLL enabled
TL
0.49
× TC
ETC
0.51
× TC
Note:
Ef = External frequency; MF = Multiplication Factor = MFI + MFN/MFD; PDF = Predivision Factor;
DF = Division Factor; TC = Internal clock cycle; ETC = External clock cycle; TH = Internal clock high;
TL = Internal clock low
Figure 2-1.
Crystal Oscillator Circuits
Table 2-5.
External Clock Operation
No.
Characteristics
Symbol
200 MHz
220 MHz
240 MHz
275 MHz
Min
Max
Min
Max
Min
Max
Min
Max
1
Frequency of EXTAL
(EXTAL Pin Frequency)1
With DPLL disabled
With DPLL enabled
2
Ef
DEFR = PDF
× PDFR
0 MHz
16 MHz
200 MHz
0 MHz
16 MHz
220 MHz
0 MHz
16 MHz
240 MHz
0 MHz
16 MHz
275 MHz
2
EXTAL input high3
With DPLL disabled
(46.7%–53.3% duty
cycle4)
With DPLL enabled
(42.5%–57.5% duty
cycle4)
ETH
2.34 ns
2.13 ns
35.9 ns
2.12 ns
1.93 ns
35.9 ns
1.95 ns
1.77 ns
35.9 ns
1.70 ns
1.55 ns
35.9 ns
3
EXTAL input low
4
With DPLL disabled
(46.7%–53.3% duty
cycle
4)
With DPLL enabled
(42.5%–57.5% duty
cycle
4)
ETL
2.34 ns
2.13 ns
35.9 ns
2.12ns
1.93 ns
35.9 ns
1.95 ns
1.77 ns
35.9 ns
1.70 ns
1.55 ns
35.9 ns
Table 2-4.
Internal Clocks (Continued)
Characteristics
Symbol
Expression
Min
Typ
Max
Suggested Component Values:
fOSC = 16–32 MHz
R = 1 M
± 10%
C = 10 pF
± 10%
Calculations are for a 16–32 MHz crystal with the following parameters:
shunt capacitance (C0) of 5.2–7.3 pF,
series resistance of 5–15
, and
drive level of 2 mW.
XTAL1
C
R
Fundamental Frequency
Crystal Oscillator
XTAL
EXTAL
Note: Make sure that in the PCTL Register:
XTLD (bit 2) = 0
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