- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄376462 > XRT8001IP (EXAR CORP) WAN Clock for T1 and E1 Systems PDF資料下載
參數(shù)資料
| 型號： | XRT8001IP |
| 廠商： | EXAR CORP |
| 元件分類： | 時(shí)鐘及定時(shí) |
| 英文描述： | WAN Clock for T1 and E1 Systems |
| 中文描述： | 8001 SERIES, PLL BASED CLOCK DRIVER, 2 TRUE OUTPUT(S), 0 INVERTED OUTPUT(S), PDIP18 |
| 封裝： | 0.300 INCH, PLASTIC, DIP-18 |
| 文件頁數(shù)： | 26/48頁 |
| 文件大?。?/td> | 1054K |
| 代理商： | XRT8001IP |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁當(dāng)前第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁
XRT8001
26
Rev. 1.01
Step 3
– Upon reviewing Table 6, write the listed
value (under the “Value to Write to D4 – D1 in CR0”
register) into the D4 through D1 bit-fields within
Command Register CR0, as illustrated below:
Command Register CR0 (Address = 0x00)
D4
D3
D2
IOC4
IOC3
IOC2
Value to Write to D4 – D1 in CR0
D1
IOC1
D0
PL1EN
X
Notes:
1.
If the user wishes to output a clock signal via the CLK1
output signal, then he/she should also write a “1” into
the “PL1EN” bit-field within Command Register CR0.
The contents of bit-fields D4 through D1 (within Com-
mand Register CR1) are “Don’t Care”
If the user wishes to output a clock signal via the CLK2
output signal, then he/she should also write a “1” into
the “PL2EN” bit-field within Command Register CR1.
2.
3.
This step configures the XRT8001 to operate in the
“Fractional T1/E1 Reverse/Master” Mode.
Step 4
– Specify the value of “P” (e.g., as in the “P x
56kHz” or “P x 64kHz” clock signal which is to be input
via the FIN Reference Clock input).
In order to specify the value for “P”, one needs to write
in the value of “P - 1” (binary format) into Command
Register CR2, as illustrated below:
Command Register, CR2 (Address = 0x02)
D4
D3
D2
SEL14
SEL13
SEL12
Value of “P - 1” (in Binary Format).
D1
D0
SEL11
SEL10
In other words, if one intends to input either a “56kHz”
or “64kHz” clock signal via the “FIN” input pin (e.g.,
where P = 1), then he/she should write a “0” into
Command Register CR2.
Command Register, CR3 (Address = 0x03)
D4
D3
D2
SEL24
SEL23
SEL22
1
1
1
D1
D0
SEL21
1
SEL20
1
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
SYNCEN
CLK1EN
CLK2EN
1
1
D2
D1
D0
LDETDIS2
0
LDETDIS1
0
1
6.4 The “E1 to T1 –Forward/Master” Mode
When the XRT8001 WAN Clock has been configured to
operate in the “E1 to T1 – Forward/Master” Mode, then
it will accept a “Q x 2.048MHz” clock signal via the
“Reference Clock” input at FIN (pin 3), where “Q” can
range anywhere between 1 - 16. In response to this
clock signal, the XRT8001 WAN Clock will output a
1.544MHz clock signal via the Clock Output pins
(CLK1 and/or CLK2).
A simple illustration of the XRT8001 WAN Clock,
operating in the “E1 to T1 - Forward/Master” Mode is
presented in Figure 16.
Step 5
– Write the binary expression “11111” into
Command Register CR3.
This step is necessary in order to insure proper opera-
tion of the XRT8001. This step is also illustrated below:
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| XRT8010 | 312MHZ CLOCK & CRYSTAL MULTIPLIER WITH LVDS OUTPUTS |
| XRT8010IL | 312MHZ CLOCK & CRYSTAL MULTIPLIER WITH LVDS OUTPUTS |
| XRT8020 | 650 MHZ CLOCK & CRYSTAL MULTIPLIER WITH LVDS OUTPUTS |
| XRT8020IL | 650 MHZ CLOCK & CRYSTAL MULTIPLIER WITH LVDS OUTPUTS |
| XRT81L27IV | SEVEN CHANNEL E1 LINE INTERFACE UNIT WITH CLOCK RECOVERY |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| XRT8001IP-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 |
| 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 |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。