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參數(shù)資料
| 型號： | ADSP-21365SCSQ-ENG |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 數(shù)字信號處理 |
| 英文描述： | SHARC Processor |
| 中文描述： | 16-BIT, 55.55 MHz, OTHER DSP, PQFP144 |
| 封裝： | MS-026BFB-HD, HSLQFP-144 |
| 文件頁數(shù)： | 19/54頁 |
| 文件大?。?/td> | 559K |
| 代理商： | ADSP-21365SCSQ-ENG |
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ADSP-21365/6
Preliminary Technical Data
Rev. PrA
|
Page 19 of 54
|
September 2004
Clock Input
Clock Signals
The ADSP-21365/6 can use an external clock or a crystal. See
the CLKIN pin description in
Table 3 on page 11
. The program-
mer can configure the ADSP-21365/6 to use its internal clock
generator by connecting the necessary components to CLKIN
and XTAL.
Figure 8
shows the component connections used for
a crystal operating in fundamental mode. Note that the clock
rate is achieved using a 16.67 MHz crystal and a PLL multiplier
ratio 16:1 (CCLK:CLKIN achieves a clock speed of 266 MHz).
To achieve the full core clock rate, programs need to configure
the multiplier bits in the PMCTL register.
Table 11. Clock Input
Parameter
333 MHz
Unit
Min
Max
Timing Requirements
t
CK
t
CKL
t
CKH
t
CKRF
t
CCLK
3
CLKIN Period
CLKIN Width Low
CLKIN Width High
CLKIN Rise/Fall (0.4V–2.0V)
CCLK Period
18
1
7.5
1
7.5
1
3.0
1
1
Applies only for CLKCFG1–0 = 00 and default values for PLL control bits in PMCTL.
2
Applies only for CLKCFG1–0 = 01 and default values for PLL control bits in PMCTL.
3
Any changes to PLL control bits in the PMCTL register must meet core clock timing specification t
CCLK
.
TBD
2
TBD
2
TBD
2
TBD
TBD
ns
ns
ns
ns
ns
Figure 7. Clock Input
CLKIN
t
CK
t
CKH
t
CKL
Figure 8. 333 MHz Operation (Fundamental Mode Crystal)
CLKIN
XTAL
C1
C2
X1
NOTE: C1 AND C2 ARE SPECIFIC TO CRYSTAL SPECIFIED FOR X1.
CONTACT CRYSTAL MANUFACTURER FOR DETAILS. CRYSTAL
SELECTION MUST COMPLY WITH CLKCFG1-0 = 10 OR = 01.
1M
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相關(guān)代理商/技術(shù)參數(shù) |
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| ADSP-21365SCSQZENG | 制造商:AD 制造商全稱:Analog Devices 功能描述:SHARC Processor |
| ADSP-21365SKBC-ENG | 制造商:AD 制造商全稱:Analog Devices 功能描述:SHARC Processor |
| ADSP-21365SKBCZENG | 制造商:AD 制造商全稱:Analog Devices 功能描述:SHARC Processor |
| ADSP-21365SKSQ-ENG | 制造商:AD 制造商全稱:Analog Devices 功能描述:SHARC Processor |
| ADSP-21365SKSQZENG | 制造商:AD 制造商全稱:Analog Devices 功能描述:SHARC Processor |
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