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参数资料
| 型号： | MCZ33781EK |
| 厂商： | Freescale Semiconductor |
| 文件页数： | 14/44页 |
| 文件大小： | 0K |
| 描述： | IC MASTER DSI 2.02 DIFF 32-SOIC |
| 标准包装： | 42 |
| 应用： | 车载系统 |
| 接口： | SPI |
| 电源电压： | 4.75 V ~ 5.25 V |
| 封装/外壳： | 32-BSOP（0.295"，7.50mm 宽）裸露焊盘 |
| 供应商设备封装： | 32-SOICW 裸露焊盘 |
| 包装： | 管件 |
| 安装类型： | 表面贴装 |
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Analog Integrated Circuit Device Data
Freescale Semiconductor
21
33781
FUNCTIONAL DESCRIPTIONS
FUNCTIONAL INTERNAL BLOCK DESCRIPTION
Spectrum block does this by multiplying the 8-bit value in the
DxFSEL register by 2 and then adding it to the number 320
(decimal). The user must choose a minimum bit time
appropriate for his system. Factors which must be considered
are the slave response time, bus wire delays, and the
minimum idle time needed to recharge the slave H_CAPs for
the channel.
To spread the spectrum beyond this minimum bit time a
random delay based on a multiple of 1/64 MHz periods can
be added to each bit. This delay is created by a Pseudo
Random Bit Sequence Generator from which a 7-bit random
number is created. This number is further qualified by the
maximum number of counts (chosen by the DEV[2:0] bits in
the DxSSCTL registers) allowed beyond the base time
period. The resulting value is added to the minimum bit time
and fed to the bit clock logic, which generates the DSI bit
clock.
It is important for the user to select a maximum deviation
value that is appropriate for the system. A larger maximum
deviation results in spreading the bit energy to more
frequencies. However, this number also establishes the
maximum period for any random bit on that channel. If the
system requires that a minimum number of bits be transferred
within a fixed time period, then the user must select a
minimum base bit time and maximum deviation time that will
meet the criteria.
Figure 12. Spread Spectrum Block Diagram
4MHz Clock
PLL
Divide by 8
24-bit PRBS
7-bit random number
Base Time Period
(from DxFSEL)
Mult x 2
Adder
320
Maximum Count Deviation
(from DxSSCTL)
Deviation
Select
Adder
Bit
Clock
Logic
Bit
Clock
64MHz Clock
3
8
9
10
7
10
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相关代理商/技术参数 |
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|---|---|
| MCZ33781EKR2 | 功能描述:输入/输出控制器接口集成电路 DBUS2 MASTER STND RoHS:否 制造商:Silicon Labs 产品: 输入/输出端数量: 工作电源电压: 最大工作温度:+ 85 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:QFN-64 封装:Tray |
| MCZ33784EF | 功能描述:加速计 - 板上安装 DBUS2 SENSOR INTERFACE RoHS:否 制造商:Murata 传感轴:Double 加速:12 g 灵敏度: 封装 / 箱体: 输出类型:Analog 数字输出 - 位数:11 bit 电源电压-最大:5.25 V 电源电压-最小:4.75 V 电源电流:4 mA 最大工作温度:+ 125 C 最小工作温度:- 40 C |
| MCZ33784EF/R2- | 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:DSI 2.02 Sensor Interface |
| MCZ33784EFR2 | 功能描述:加速计 - 板上安装 DBUS2 SENSOR INTERFACE RoHS:否 制造商:Murata 传感轴:Double 加速:12 g 灵敏度: 封装 / 箱体: 输出类型:Analog 数字输出 - 位数:11 bit 电源电压-最大:5.25 V 电源电压-最小:4.75 V 电源电流:4 mA 最大工作温度:+ 125 C 最小工作温度:- 40 C |
| MCZ33789AE | 功能描述:网络控制器与处理器 IC Airbag ASSP RoHS:否 制造商:Micrel 产品:Controller Area Network (CAN) 收发器数量: 数据速率: 电源电流（最大值）:595 mA 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:PBGA-400 封装:Tray |
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