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參數(shù)資料
| 型號(hào)： | CDCE913_1 |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | Programmable 1-PLL VCXO Clock Synthesizer With 1.8-V, 2.5-V, and 3.3-V Outputs |
| 中文描述： | 可編程1 - PLL頻率石英振蕩器時(shí)鐘合成器的1.8 V，2.5 V和3.3 V輸出 |
| 文件頁數(shù)： | 10/23頁 |
| 文件大?。?/td> | 428K |
| 代理商： | CDCE913_1 |
www.ti.com
DEFAULT DEVICE CONFIGURATION
The internal EEPROM of CDCE913/CDCEL913 is pre-configured with a factory default configuration as shown in
Figure 6
(The input frequency is passed through the output as a default).This allows the device to operate in
default mode without the extra production step of programming it. The default setting appears after power is
supplied or after power-down/up sequence until it is reprogrammed by the user to a different application
configuration. A new register setting is programmed via the serial SDA/SCL Interface.
EEPROM
Xin
Xout
GND
LV
CMOS
Pdiv1 =1
LV
CMOS
Pdiv3 = 1
Pdiv2 = 1
M
M
LV
CMOS
Input Clock
M
PLL Bypass
PLL1
power down
M
S0
SDA
SCL
Programming Bus
27 MHz
Crystal
1 = Output Enabled
0 = Output 3-State
X-tal
Programming
and
SDA/SCL
Register
V
DD
V
DDOUT
Y1 = 27 MHz
Y2 = 27 MHz
Y3 = 27 MHz
SDA/SCL SERIAL INTERFACE
The CDCE913/CDCEL913 operates as a slave device of the 2-wire serial SDA/SCL bus, compatible with the
popular SMBus or I2C specification. It operates in the standard-mode transfer (up to 100kbit/s) and fast-mode
transfer (up to 400kbit/s) and supports 7-bit addressing.
CDCE913
CDCEL913
SCAS849A–JUNE 2007–REVISED AUGUST 2007
S1/SDA and S2/SCL pins of the CDCE913/CDCEL913 are dual function pins. In default configuration they are
defined as SDA/SCL for the serial programming interface. They can be programmed as control-pins (S1/S2) by
setting the appropriate bits in the EEPROM. Note that the changes to the Control Register (Bit [
6
] of Byte
02h
)
have no effect until they are written into the EEPROM.
Once they are set as control pins, the serial programming interface is no longer available. However, if V
DDOUT
is
forced to GND, the two control pins, S1 and S2, temporally act as serial programming pins (SDA/SCL).
S0 is
not
a multi use pin; it is a control pin only.
Figure 6. Default Configuration
A different default setting can be programmed upon customer request. Contact Texas Instruments sales or
marketing representative for more information.
Table 4
shows the factory default setting for the Control Terminal Register. Note that even though 8 different
register settings are possible, in default configuration, only the first two settings (0 and 1) can be selected with
S0, as S1 and S2 are configured as programming pins in default mode.
Table 4. Factory Default Setting for Control Terminal Register
(1)
Y1
PLL1 Settings
SSC Selection
SSC1
External Control Pins
Output Selection
Y1
3-state
enabled
Frequency Selection
FS1
f
VCO1_0
f
VCO1_0
Output Selection
Y2Y3
3-state
enabled
S2
S1
S0
0
1
SCL (I2C)
SCL (I2C)
SDA (I2C)
SDA (I2C)
off
off
(1)
In default mode or when programmed respectively, S1 and S2 act as serial programming interface, SDA/SCL. They do not have any
control-pin function but they are internally interpreted as if S1=0 and S2=0. S0, however, is a control-pin which in the default mode
switches all outputs ON or OFF (as previously predefined).
The S1/SDA and S2/SCL pins of the CDCE913/CDCEL913 are dual function pins. In the default configuration
they are used as SDA/SCL serial programming interface. They can be re-programmed as general purpose
control pins, S1 and S2, by changing the corresponding EEPROM setting, Byte
02h
, Bit [
6
].
10
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Copyright 2007, Texas Instruments Incorporated
Product Folder Link(s):
CDCE913 CDCEL913
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| CDCE913PERF-EVM | 功能描述:時(shí)鐘和定時(shí)器開發(fā)工具 CDCE913 Perf Eval Mod RoHS:否 制造商:Texas Instruments 產(chǎn)品:Evaluation Modules 類型:Clock Conditioners 工具用于評(píng)估:LMK04100B 頻率:122.8 MHz 工作電源電壓:3.3 V |
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| CDCE913PW | 功能描述:時(shí)鐘合成器/抖動(dòng)清除器 Programmable 1PLL VCXO Clock Synth RoHS:否 制造商:Skyworks Solutions, Inc. 輸出端數(shù)量: 輸出電平: 最大輸出頻率: 輸入電平: 最大輸入頻率:6.1 GHz 電源電壓-最大:3.3 V 電源電壓-最小:2.7 V 封裝 / 箱體:TSSOP-28 封裝:Reel |
| CDCE913PWG4 | 功能描述:時(shí)鐘合成器/抖動(dòng)清除器 Programmable 1-PLL VCXO Clock Synth RoHS:否 制造商:Skyworks Solutions, Inc. 輸出端數(shù)量: 輸出電平: 最大輸出頻率: 輸入電平: 最大輸入頻率:6.1 GHz 電源電壓-最大:3.3 V 電源電壓-最小:2.7 V 封裝 / 箱體:TSSOP-28 封裝:Reel |
| CDCE913PWR | 功能描述:時(shí)鐘合成器/抖動(dòng)清除器 Programmable 1PLL VCXO Clock Synth RoHS:否 制造商:Skyworks Solutions, Inc. 輸出端數(shù)量: 輸出電平: 最大輸出頻率: 輸入電平: 最大輸入頻率:6.1 GHz 電源電壓-最大:3.3 V 電源電壓-最小:2.7 V 封裝 / 箱體:TSSOP-28 封裝:Reel |
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