Dial-A-Frequency
參數(shù)資料
型號(hào): SL28541BZCT
廠商: Silicon Laboratories Inc
文件頁數(shù): 8/31頁
文件大?。?/td> 0K
描述: IC CLOCK CK505 MOBILE 64TSSOP
標(biāo)準(zhǔn)包裝: 2,000
類型: 時(shí)鐘/頻率發(fā)生器
PLL:
主要目的: Intel CPU 服務(wù)器
輸入: 時(shí)鐘,晶體
輸出: HCSL,LVCMOS
電路數(shù): 1
比率 - 輸入:輸出: 1:21
差分 - 輸入:輸出: 無/是
頻率 - 最大: 400MHz
電源電壓: 3.135 V ~ 3.465 V
工作溫度: 0°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 64-TFSOP (0.240",6.10mm 寬)
供應(yīng)商設(shè)備封裝: 64-TSSOP
包裝: 帶卷 (TR)
SL28541
...................... DOC #: SP-AP-0063 (Rev. AA) Page 16 of 31
Dial-A-Frequency (CPU and SRC Clocks)
This feature allows the user to over-clock their system by
slowly stepping up the CPU or SRC frequency. When the
programmable output frequency feature is enabled, the CPU
and SRC frequencies are determined by the following
equation:
Fcpu = G * N/M or Fcpu=G2 * N, where G2 = G / M.
“N” and “M” are the values programmed in Programmable
Frequency Select N-Value Register and M-Value Register,
respectively.
“G” stands for the PLL Gear Constant, which is determined
by the programmed value of FS[E:A]. See Table 1,
Frequency Select Table for the Gear Constant for each
Frequency selection. The PCI Express only allows user
control of the N register, the M value is fixed and
documented in Table 1, Frequency Select Table.
In this mode, the user writes the desired N and M values into
the DAF I2C registers. The user cannot change only the M
value and must change both the M and the N values at the
same time, if they require a change to the M value. The user
may change only the N value.
Associated Register Bits
CPU_DAF Enable – This bit enables CPU DAF mode. By
default, it is not set. When set, the operating frequency is
determined by the values entered into the CPU_DAF_N
register. Note that the CPU_DAF_N and M register must
contain valid values before CPU_DAF is set. Default = 0,
(No DAF).
CPU_DAF_N – There are nine bits (for 512 values) to
linearly change the CPU frequency (limited by VCO range).
Table 7. PLL3/SE Configuration Table
GCLK_SEL
B1b4
B1b3
B1b2
B1b1
Pin 24 (17) MHz Pin 25 (18) MHz Spread (%)
Comment
0
0000
PLL3 Disabled
0
0001
100
0.5
SRC1 from SRC_Main
0
0010
100
0.5
LCD_100 from PLL3
0
0011
100
1
LCD_100 from PLL3
0
0100
100
1.5
LCD_100 from PLL3
0
0101
100
2
LCD_100 from PLL3
0
0110
N/A
0
0111
N/A
0
1000
N/A
0
1001
N/A
0
1010
N/A
0
1011
N/A
0
1100
N/A
none
N/A
0
1101
N/A
0
1110
N/A
0
1111
N/A
1
0000
N/A
1
0001
27M_NSS
27M_SS
0.5
27M_SS from PLL3
1
0010
27M_NSS
27M_SS
0.5
27M_SS from PLL3
1
0011
27M_NSS
27M_SS
1
27M_SS from PLL3
1
0100
27M_NSS
27M_SS
1.5
27M_SS from PLL3
1
0101
27M_NSS
27M_SS
2
27M_SS from PLL3
1
0110
N/A
1
0111
N/A
1
1000
N/A
1
1001
N/A
1
1010
N/A
1
1011
N/A
1
1100
N/A
1
1101
N/A
相關(guān)PDF資料
PDF描述
V150B48H250B2 CONVERTER MOD DC/DC 48V 250W
CY28548ZXCT IC CLK CK505 960M/965M 64TSSOP
V150B36H250BL2 CONVERTER MOD DC/DC 36V 250W
MS27473T22F55S CONN PLUG 55POS STRAIGHT W/SCKT
V150B36H250BF3 CONVERTER MOD DC/DC 36V 250W
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
SL28541BZI 功能描述:時(shí)鐘發(fā)生器及支持產(chǎn)品 Montevina RoHS:否 制造商:Silicon Labs 類型:Clock Generators 最大輸入頻率:14.318 MHz 最大輸出頻率:166 MHz 輸出端數(shù)量:16 占空比 - 最大:55 % 工作電源電壓:3.3 V 工作電源電流:1 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-56
SL28541BZI-2 功能描述:時(shí)鐘發(fā)生器及支持產(chǎn)品 Montevina, Atom RoHS:否 制造商:Silicon Labs 類型:Clock Generators 最大輸入頻率:14.318 MHz 最大輸出頻率:166 MHz 輸出端數(shù)量:16 占空比 - 最大:55 % 工作電源電壓:3.3 V 工作電源電流:1 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-56
SL28541BZI-2T 功能描述:時(shí)鐘發(fā)生器及支持產(chǎn)品 Montevina, Atom RoHS:否 制造商:Silicon Labs 類型:Clock Generators 最大輸入頻率:14.318 MHz 最大輸出頻率:166 MHz 輸出端數(shù)量:16 占空比 - 最大:55 % 工作電源電壓:3.3 V 工作電源電流:1 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-56
SL28541BZIT 功能描述:時(shí)鐘發(fā)生器及支持產(chǎn)品 Montevina RoHS:否 制造商:Silicon Labs 類型:Clock Generators 最大輸入頻率:14.318 MHz 最大輸出頻率:166 MHz 輸出端數(shù)量:16 占空比 - 最大:55 % 工作電源電壓:3.3 V 工作電源電流:1 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-56
SL28610BLC 功能描述:時(shí)鐘發(fā)生器及支持產(chǎn)品 AtomPoulsbo Handheld Embed.1.5V PCIe G1 RoHS:否 制造商:Silicon Labs 類型:Clock Generators 最大輸入頻率:14.318 MHz 最大輸出頻率:166 MHz 輸出端數(shù)量:16 占空比 - 最大:55 % 工作電源電壓:3.3 V 工作電源電流:1 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-56