参数资料
型号: DSP56852VFE
厂商: Freescale Semiconductor
文件页数: 13/48页
文件大小: 0K
描述: IC DSP 16BIT 120MHZ 81-MAPBGA
标准包装: 348
系列: 568xx
核心处理器: 56800E
芯体尺寸: 16-位
速度: 120MHz
连通性: EBI/EMI,SCI,SPI,SSI
外围设备: POR,WDT
输入/输出数: 11
程序存储器容量: 12KB(6K x 16)
程序存储器类型: SRAM
RAM 容量: 4K x 16
电压 - 电源 (Vcc/Vdd): 1.8 V ~ 3.3 V
振荡器型: 内部
工作温度: -40°C ~ 85°C
封装/外壳: 81-LFBGA
包装: 托盘
56852 Technical Data, Rev. 8
20
Freescale Semiconductor
VDD should not be allowed to rise early (1). This is usually avoided by running the regulator for the VDD
supply (1.8V) from the voltage generated by the 3.3V VDDIO supply, see Figure 4-3. This keeps VDD from
rising faster than VDDIO.
VDD should not rise so late that a large voltage difference is allowed between the two supplies (2).
Typically this situation is avoided by using external discrete diodes in series between supplies, as shown
in Figure 4-3. The series diodes forward bias when the difference between VDDIO and VDD reaches
approximately 2.1, causing VDD to rise as VDDIO ramps up. When the VDD regulator begins proper
operation, the difference between supplies will typically be 0.8V and conduction through the diode chain
reduces to essentially leakage current. During supply sequencing, the following general relationship
should be adhered to:
VDDIO > VDD > (VDDIO - 2.1V)
In practice, VDDA is typically connected directly to VDDIO with some filtering.
Figure 4-3 Example Circuit to Control Supply Sequencing
4.4 AC Electrical Characteristics
Timing waveforms in Section 4.2 are tested with a VIL maximum of 0.8V and a VIH minimum of 2.0V for
all pins except XTAL, which is tested using the input levels in Section 4.2. In Figure 4-4 the levels of
VIH and VIL for an input signal are shown.
Figure 4-4 Input Signal Measurement References
3.3V
Regulator
1.8V
Regulator
Supply
VDD
VDDIO, VDDA
VIH
VIL
Fall Time
Input Signal
Note: The midpoint is VIL + (VIH – VIL)/2.
Midpoint1
Low
High
90%
50%
10%
Rise Time
相关PDF资料
PDF描述
DSP56854FGE IC DSP 16BIT 120MHZ 128-LQFP
DSP56855BUE IC DSP 16BIT 120MHZ 100-LQFP
DSP56857BUE IC DSP 16BIT 120MHZ 100-LQFP
DSP56858FVE IC DSP 16BIT 120MHZ 144-LQFP
DSP56F801FA80E IC DSP 60MHZ 16KB FLASH 48-LQFP
相关代理商/技术参数
参数描述
DSP56853 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:16-bit Digital Signal Controllers
DSP56853E 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:16-bit Digital Signal Controllers
DSP56853FG120 功能描述:数字信号处理器和控制器 - DSP, DSC 120Mhz/120MIPS RoHS:否 制造商:Microchip Technology 核心:dsPIC 数据总线宽度:16 bit 程序存储器大小:16 KB 数据 RAM 大小:2 KB 最大时钟频率:40 MHz 可编程输入/输出端数量:35 定时器数量:3 设备每秒兆指令数:50 MIPs 工作电源电压:3.3 V 最大工作温度:+ 85 C 封装 / 箱体:TQFP-44 安装风格:SMD/SMT
DSP56853FGE 功能描述:数字信号处理器和控制器 - DSP, DSC 120Mhz/120MIPS RoHS:否 制造商:Microchip Technology 核心:dsPIC 数据总线宽度:16 bit 程序存储器大小:16 KB 数据 RAM 大小:2 KB 最大时钟频率:40 MHz 可编程输入/输出端数量:35 定时器数量:3 设备每秒兆指令数:50 MIPs 工作电源电压:3.3 V 最大工作温度:+ 85 C 封装 / 箱体:TQFP-44 安装风格:SMD/SMT
DSP56853PB 制造商:未知厂家 制造商全称:未知厂家 功能描述:56853 Digital Signal Processor Product Brief