- 您现在的位置：买卖IC网 > PDF目录1243 > SI5XX-PROG-EVB (Silicon Laboratories Inc)KIT EVALUATION FOR SI5XX PDF资料下载
参数资料
| 型号： | SI5XX-PROG-EVB |
| 厂商： | Silicon Laboratories Inc |
| 文件页数： | 16/32页 |
| 文件大小： | 0K |
| 描述： | KIT EVALUATION FOR SI5XX |
| 标准包装： | 1 |
| 主要目的： | 计时，可重新配置的振荡器 |
| 嵌入式： | 是，MCU，8 位 |
| 已用 IC / 零件： | Si514，Si570，Si571，Si598，Si599 |
| 主要属性： | 100kHz ~ 1.4GHz 频率范围 |
| 次要属性： | I²C 接口 |
| 已供物品： | 板，线缆，文档，软件 |
| 其它名称： | 336-2011 |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页当前第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页
Si570/Si571
46.043042064
Multiply the fractional portion by 2 28
.043042064 x 2 28 = 11554016.077
Convert integer portion to a 10-bit binary number
46 = 00 0010 1110b
Truncate the remaining fractional portion
= 11554016
Convert to a 28-bit binary number (pad 0s on the left)
0000 1011 0000 0100 1100 1110 0000
Concatenate the two results
00 0010 1110 0000 1011 0000 0100 1100 1110 0000b
Convert to Hex
02E0B04CE0h
Figure 4. Example of RFREQ Decimal to Hexadecimal Conversion
f XTAL = --------------------------------------- = 114.285 MHz
RFREQ new = ----------------------- = 45.11746948
3.1.2.1. Writing the New Frequency Configuration
Once the new values for RFREQ, HSDIV, and N1 are
determined, they can be written directly into the device
from the serial port using the following procedure:
1. Freeze the DCO (bit 4 of Register 137)
2. Write the new frequency configuration (RFREQ,
HSDIV, and N1) to addresses 7–12 for all Si571
devices and Si570 devices with 20 ppm and 50 ppm
temperature stability; or addresses 13–18 for Si570
devices with 7 ppm temperature stability.
3. Unfreeze the DCO and assert the NewFreq bit (bit 6
of Register 135) within the maximum Unfreeze to
The process of freezing and unfreezing the DCO will
cause the output clock to momentarily stop and start at
any arbitrary point during a clock cycle. This process
can take up to 10 ms. Circuitry that is sensitive to
glitches or runt pulses may have to be reset after the
new frequency configuration is written.
Example:
An Si570 generating 156.25 MHz must be re-configured
to generate a 161.1328125 MHz clock (156.25 MHz x
66/64). This frequency change is greater than
±3500 ppm.
f out = 156.25 MHz
Read the current values for RFREQ, HS_DIV, N1:
RFREQ current = 0x2BC011EB8h = 11744124600d,
11744124600d x 2 28 = 43.7502734363d
HS_DIV = 4
N1 = 8
Calculate f XTAL , f DCO_current
f DCO_current = f out ? HSDV ? N1 = 5.000000000 GHz
f DCO_current
RFREQ current
Given f out_new = 161.1328125 MHz, choose output
dividers that will keep f DCO within the range of 4.85 to
5.67 GHz. In this case, keeping the same output
dividers will still keep f DCO within its range limits:
f DCO_new = f out_new ? HSDV new ? N1 new
= 161.1328125 MHz ? 4 ? 8 = 5.156250000 GHz
Calculate the new value of RFREQ given the new DCO
frequency:
f DCO_new
f XTAL
= 0x2D1E127AD
16
Rev. 1.4
相关PDF资料 |
PDF描述 |
|---|---|
| SI84XXCOM-RD | KIT EVAL FOR SI84XXCOM |
| SILICON-EXPLORER II | SOFTWARE ANALYSIS EXPLORER LOGIC |
| SILINKPS-EVB | DAUGHTER CARD PROSLIC PS |
| SKP16C26A | DEV EVALUATION KIT M16C/26A |
| SKP32C85-100-CL | DEV EVALUATION KIT M32C/85 100PN |
相关代理商/技术参数 |
参数描述 |
|---|---|
| SI5XXUC-EVB | 功能描述:XO & VCXO UNIVERSAL EVAL BOARD 制造商:silicon labs 系列:- 零件状态:在售 主要用途:计时，时钟振荡器 嵌入式:- 使用的 IC/零件:Si5xxUC 主要属性:- 辅助属性:- 所含物品:板 标准包装:1 |
| SI-60001 | 制造商:Bel Fuse 功能描述:CONN RJ-45 RCP 8 POS 2.54MM SLDR RA TH 12TERM - Trays |
| SI-60001-F | 功能描述:CONN MAGJACK 1PORT SHLD 10/100BT RoHS:是 类别:连接器，互连式 >> 模块 - 带磁性元件的插座 系列:MagJack® ST SI-60000 标准包装:60 系列:ARJ11D 连接器类型:RJ45 端口数:1 行数:1 安装类型:通孔，直角 速度:10/100 Base-T 板上方高度:0.545"（13.84mm） LED 颜色:绿 - 黄 每一插座芯体的数目:4 屏蔽:屏蔽式，EMI指 翼片方向:上 特点:AutoMDIX，板锁 包装:托盘 |
| SI-60002 | 制造商:BEL 制造商全称:Bel Fuse Inc. 功能描述:SI-60002 |
| SI-60002-F | 功能描述:CONN MAGJACK 1PORT SHLD 10/100BT RoHS:是 类别:连接器，互连式 >> 模块 - 带磁性元件的插座 系列:MagJack® ST SI-60000 标准包装:60 系列:ARJ11D 连接器类型:RJ45 端口数:1 行数:1 安装类型:通孔，直角 速度:10/100 Base-T 板上方高度:0.545"（13.84mm） LED 颜色:绿 - 黄 每一插座芯体的数目:4 屏蔽:屏蔽式，EMI指 翼片方向:上 特点:AutoMDIX，板锁 包装:托盘 |
发布紧急采购，3分钟左右您将得到回复。