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參數(shù)資料
| 型號： | S1M8831A |
| 廠商： | SAMSUNG SEMICONDUCTOR CO. LTD. |
| 英文描述： | FRACTIONAL-N RF/INTEGER-N IF DUAL PLL |
| 中文描述： | 分?jǐn)?shù)N射頻/整數(shù)N如果雙鎖相環(huán) |
| 文件頁數(shù)： | 23/32頁 |
| 文件大?。?/td> | 248K |
| 代理商： | S1M8831A |
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FRACTIONAL-N RF/INTEGER-N IF DUAL PLL
S1M8831A/33
23
Program Mode Control
Power Down Mode Operation
Control Words
IF_CTL_WORD
Control bits
IF_N[20]
IF_N[19]
Acronym
PWDN_IF
PWDN
LOW (0)
Power Up
Asynchronous
Power Down
Power Up
HIGH (1)
Power Down
Synchronous
Power Down
Power Down
Comments
IF
RF and IF
RF_CTL_WORD
RF_N[22]
PWDN_RF
RF
Each PLL is individually power controlled by the enable pins (RF_EN and IF_EN pins) or program control bits
(PWDN, PWDN_RF/IF). The enable pins override the program control bits. When both enable pins are HIGH, the
program control bits determine the state of power control. Power down forces all the internal analog blocks to be
deactivated and the charge pump output to be in a TRISTATE. The oscillator circuitry function becomes disabled
dependent on the state of IF and RF power-down bits, IF_N[20] and RF_N[22]. The RF(or IF) oscillator buffer is
powered down when the power down bit (RF_N[22] or IF_N[20]) becomes HIGH. The control register and R/N
counters, however, remains active for permitting serial programming and is capable of loading and latching in
data during the power down. The PLL returns to the active power-up mode when IF_N[20] and RF_N[22] become
LOW.
There are synchronous and asynchronous power-down modes for S1M8831A/33. The power-down bit IF_N[19] is
used to select between synchronous and asynchronous power down. Synchronous power down mode occurs if
IF_N[19] bit is HIGH and then the power down bit (RF_N[22] or IF_N[20]) becomes HIGH. In the synchronous
power down mode, the power-down function will go into power down mode upon the completion of a charge
pump pulse event because it is synchronized with the charge pump and thus can diminish undesired frequency
jumps. Asynchronous power down mode occurs if IF_N[19] bit is LOW and then the power down bit (RF_N[22] or
IF_N[20]) becomes HIGH. Activation of the asynchronous function will go into power-down mode immediately.
RF Power Down Mode Table
RF_N[22]
IF_N[19]
Power Down Mode Status
0
0
RF PLL active
0
1
RF PLL active, only charge pump to TRISTATE
1
0
Asynchronous power down
1
1
Synchronous power down
IF Power Down Mode Table
IF_N[20]
0
0
1
1
IF_N[19]
0
1
0
1
Power Down Mode Status
IF PLL active
IF PLL active, only charge pump to TRISTATE
Asynchronous power down
Synchronous power down
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
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| S1M8831A/33 | 制造商:SAMSUNG 制造商全稱:Samsung semiconductor 功能描述:FRACTIONAL-N RF/INTEGER-N IF DUAL PLL |
| S1M8831A01-G0T0 | 制造商:SAMSUNG 制造商全稱:Samsung semiconductor 功能描述:FRACTIONAL-N RF/INTEGER-N IF DUAL PLL |
| S1M8833 | 制造商:SAMSUNG 制造商全稱:Samsung semiconductor 功能描述:FRACTIONAL-N RF/INTEGER-N IF DUAL PLL |
| S1M8833X01-G0T0 | 制造商:SAMSUNG 制造商全稱:Samsung semiconductor 功能描述:FRACTIONAL-N RF/INTEGER-N IF DUAL PLL |
| S1M8836 | 制造商:SAMSUNG 制造商全稱:Samsung semiconductor 功能描述:FRACTIONAL-N RF/INTEGER-N IF DUAL PLL |
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