Rev. 1.01 Value of “M” Value to be Written into Command Register CR2 1 0000X 2 0001X 4 001XX 8 X1XX or 1XXX Table 7. Relationship Be" />
參數(shù)資料
型號: XRT8001IP-F
廠商: Exar Corporation
文件頁數(shù): 24/48頁
文件大小: 0K
描述: IC WAN CLOCK E1/E1 DUAL 18PDIP
產(chǎn)品變化通告: XRT obsolescence 05/Mar/2012
標(biāo)準(zhǔn)包裝: 41
類型: 時鐘/頻率發(fā)生器
PLL:
主要目的: 以太網(wǎng)(WAN),T1/E1
輸入: 時鐘
輸出: 時鐘
電路數(shù): 1
比率 - 輸入:輸出: 1:2
差分 - 輸入:輸出: 無/無
頻率 - 最大: 16.384kHz
電源電壓: 3.3 V ~ 5 V
工作溫度: -40°C ~ 85°C
安裝類型: 通孔
封裝/外殼: 18-DIP(0.300",7.62mm)
供應(yīng)商設(shè)備封裝: 18-PDIP
包裝: 管件
XRT8001
30
Rev. 1.01
Value of “M”
Value to be Written into
Command Register CR2
1
0000X
2
0001X
4
001XX
8
X1XX or 1XXX
Table 7. Relationship Between the Value of
“M” and the Value to Be Written into Command
Register CR2 (in Order to Configure the “CLK1”
Output Frequency)
Note: The expression “X” indicates a “Don’t Care” value for
that particular bit-field.
Command Register, CR2 (Address = 0x02)
D4
D3
D2
D1
D0
SEL14
SEL13
SEL12
SEL11
SEL10
Value from Table 7
Step 5 – Specify the value for “M” (e.g., as in the “M x
2.048MHz” clock signal) which is to be the output on
the “CLK2” output pin.
This is accomplished by reviewing Table 8, and deter-
mining the 5-bit binary value which corresponds with
the desired value of “M”. Afterwards, the user should
write this value into Command Register, CR3.
Value of “M”
Value to be Written into
Command Register CR3
1
0000X
2
0001X
4
001XX
8
X1XXX or 1XXXX
Table 8. Relationship Between the Value of
“M” and the Value to Be Written into Command
Register CR3 (in Order to Configure the “CLK2”
Output Frequency)
Note: The expression “X” indicates a “Don’t Care” value
for that particular bit-field.
Command Register, CR3 (Address = 0x03)
D4
D3
D2
D1
D0
SEL24
SEL23
SEL22
SEL21
SEL20
Value from Table 8
Step 6 – Enable any of the following output signals as
appropriate:
“SYNC”, “CLK1”, “CLK2” and
“LOCKDET”.
This is accomplished by writing a “1” into the corre-
sponding bit-fields, within Command Register CR4, as
illustrated below:
Command Register CR4, (Address = 0x04)
D4
D3
D2
D1
D0
SYNCEN
CLK1EN
CLK2EN
LDETDIS2
LDETDIS1
1
0
6.8 The "Forward/Slave" Mode
When the XRT8001 WAN Clock has been configured to
operate in the “Forward/Slave” Mode, then it will accept
an 8kHz clock signal via the “Reference Clock” input at
FIN (pin 3). In response to this clock signal, the
XRT8001 WAN Clock will output either a “L x 56kHz” or
“L x 64kHz” clock signal via the “Clock Output pins”
(CLK1 and CLK2); where L can range in value from 1 to
32.
A simple illustration of the XRT8001 WAN Clock
operating in the "Forward/Slave" Mode” is presented in
Figure 18.
相關(guān)PDF資料
PDF描述
XRT8010IL-F IC CLK MULTIPLR LVDS 16QFN
XRT8020IL-F IC CLK MULTIPLR LVDS 16QFN
XRT91L31IQ IC TXRX SONET/SDH 8BIT 64QFP
XRT91L33IG-F IC MULTIRATE CDR 20TSSOP
XRT91L34IV-F IC MULTIRATE CDR QUAD 128LQFP
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
XRT8010 制造商:EXAR 制造商全稱:EXAR 功能描述:312MHZ CLOCK & CRYSTAL MULTIPLIER WITH LVDS OUTPUTS
XRT8010ES 功能描述:鎖相環(huán) - PLL RoHS:否 制造商:Silicon Labs 類型:PLL Clock Multiplier 電路數(shù)量:1 最大輸入頻率:710 MHz 最小輸入頻率:0.002 MHz 輸出頻率范圍:0.002 MHz to 808 MHz 電源電壓-最大:3.63 V 電源電壓-最小:1.71 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:QFN-36 封裝:Tray
XRT8010IL 制造商:EXAR 制造商全稱:EXAR 功能描述:312MHZ CLOCK & CRYSTAL MULTIPLIER WITH LVDS OUTPUTS
XRT8010IL-F 功能描述:鎖相環(huán) - PLL . . RoHS:否 制造商:Silicon Labs 類型:PLL Clock Multiplier 電路數(shù)量:1 最大輸入頻率:710 MHz 最小輸入頻率:0.002 MHz 輸出頻率范圍:0.002 MHz to 808 MHz 電源電壓-最大:3.63 V 電源電壓-最小:1.71 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:QFN-36 封裝:Tray
XRT8020 制造商:EXAR 制造商全稱:EXAR 功能描述:650 MHZ CLOCK & CRYSTAL MULTIPLIER WITH LVDS OUTPUTS