参数资料
型号: TMS470R1A384PGET
厂商: Texas Instruments
文件页数: 49/62页
文件大小: 0K
描述: IC RISC FLASH MCU 144-LQFP
标准包装: 60
系列: TMS470
核心处理器: ARM7
芯体尺寸: 16/32-位
速度: 48MHz
连通性: CAN,C2Slb,I²C,SCI,SPI
外围设备: DMA,PWM,WDT
输入/输出数: 94
程序存储器容量: 384KB(384K x 8)
程序存储器类型: 闪存
RAM 容量: 32K x 8
电压 - 电源 (Vcc/Vdd): 1.71 V ~ 2.05 V
数据转换器: A/D 12x10b
振荡器型: 外部
工作温度: -40°C ~ 105°C
封装/外壳: 144-LQFP
包装: 托盘
产品目录页面: 718 (CN2011-ZH PDF)
配用: 296-23003-ND - KIT DEV KICKSTART TMS470
其它名称: 296-18724
HIGH-END TIMER (HET) TIMINGS
Minimum PWM Output Pulse Width:
Minimum Input Pulses that Can Be Captured:
www.ti.com ......................................................................................................................................................... SPNS110E – AUGUST 2005 – REVISED MAY 2008
This is equal to one high resolution clock period (HRP). The HRP is defined by the 6-bit high resolution prescale
factor (hr), which is user defined, giving prescale factors of 1 to 64, with a linear increment of codes.
Therefore, the minimum PWM output pulse width = HRP(min) = hr(min)/SYSCLK = 1/SYSCLK
For example, for a SYSCLK of 30 MHz, the minimum PWM output pulse width = 1/30 = 33.33ns
The input pulse width must be greater or equal to the low resolution clock period (LRP), i.e., the HET loop (the
HET program must fit within the LRP). The LRP is defined by the 3-bit loop-resolution prescale factor (lr), which
is user defined, with a power of 2 increment of codes. That is, the value of lr can be 1, 2, 4, 8, 16, or 32.
Therefore, the minimum input pulse width = LRP(min) = hr(min) * lr(min)/SYSCLK = 1 * 1/SYSCLK
For example, with a SYSCLK of 30 MHz, the minimum input pulse width = 1 * 1/30 = 33.33 ns
NOTE:
Once the input pulse width is greater than LRP, the resolution of the measurement is
still HRP. (That is, the captured value gives the number of HRP clocks inside the
pulse.)
Abbreviations:
hr = HET high resolution divide rate = 1, 2, 3,...63, 64
lr = HET low resolution divide rate = 1, 2, 4, 8, 16, 32
High resolution clock period = HRP = hr/SYSCLK
Loop resolution clock period = LRP = hr*lr/SYSCLK
Copyright 2005–2008, Texas Instruments Incorporated
53
Product Folder Link(s): TMS470R1A384
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TMS470R1A384PGETR 制造商:Texas Instruments 功能描述:48MHZ / 384K FLASH - Tape and Reel
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TMS470R1A384PZQR 制造商:Texas Instruments 功能描述:48MHZ / 384K FLASH - Tape and Reel
TMS470R1A384PZT 制造商:Texas Instruments 功能描述:MCU 16-bit/32-bit TMS470 ARM7TDMI RISC 384KB Flash 1.8V 100-Pin LQFP Tray
TMS470R1A384PZ-T 功能描述:ARM微控制器 - MCU 48mhz / 384k Flash RoHS:否 制造商:STMicroelectronics 核心:ARM Cortex M4F 处理器系列:STM32F373xx 数据总线宽度:32 bit 最大时钟频率:72 MHz 程序存储器大小:256 KB 数据 RAM 大小:32 KB 片上 ADC:Yes 工作电源电压:1.65 V to 3.6 V, 2 V to 3.6 V, 2.2 V to 3.6 V 工作温度范围:- 40 C to + 85 C 封装 / 箱体:LQFP-48 安装风格:SMD/SMT