参数资料
型号: TMX320F28069UPFPA
厂商: Texas Instruments
文件页数: 39/174页
文件大小: 0K
描述: IC MCU 32BIT 128KB FLASH 80HTQFP
产品培训模块: ControlSUITE
Piccolo F2806x
标准包装: 1
系列: TMS320F2806x, Piccolo™, C2000™
核心处理器: C28x
芯体尺寸: 32-位
速度: 80MHz
连通性: CAN,I²C,McBSP,SCI,SPI,UART/USART
外围设备: 欠压检测/复位,DMA,POR,PWM,WDT
输入/输出数: 40
程序存储器容量: 256KB(128K x 16)
程序存储器类型: 闪存
RAM 容量: 50K x 16
电压 - 电源 (Vcc/Vdd): 1.71 V ~ 1.995 V
数据转换器: A/D 12x12b
振荡器型: 内部
工作温度: -40°C ~ 85°C
封装/外壳: 80-TQFP 裸露焊盘
包装: 托盘
其它名称: 296-30085
TMX320F28069UPFPA-ND
SPRS698D – NOVEMBER 2010 – REVISED DECEMBER 2012
5.18 High-Resolution PWM (HRPWM)
This module combines multiple delay lines in a single module and a simplified calibration system by using
a dedicated calibration delay line. For each ePWM module there is one HR delay line.
The HRPWM module offers PWM resolution (time granularity) that is significantly better than what can be
achieved using conventionally derived digital PWM methods. The key points for the HRPWM module are:
Significantly extends the time resolution capabilities of conventionally derived digital PWM
This capability can be utilized in both single edge (duty cycle and phase-shift control) as well as dual
edge control for frequency/period modulation.
Finer time granularity control or edge positioning is controlled via extensions to the Compare A and
Phase registers of the ePWM module.
HRPWM capabilities, when available on a particular device, are offered only on the A signal path of an
ePWM module (that is, on the EPWMxA output). EPWMxB output has conventional PWM capabilities.
NOTE
The minimum SYSCLKOUT frequency allowed for HRPWM is 60 MHz.
NOTE
When dual-edge high-resolution is enabled (high-resolution period mode), the PWMxB
channel will have ±1–2 TBCLK cycles of jitter on the output.
5.18.1
High-Resolution PWM (HRPWM) Electrical Data/Timing
Table 5-55 shows the high-resolution PWM switching characteristics.
Table 5-55. High-Resolution PWM Characteristics(1)
PARAMETER
MIN
TYP
MAX
UNIT
Micro Edge Positioning (MEP) step size(2)
150
310
ps
(1)
The HRPWM operates at a minimum SYSCLKOUT frequency of 60 MHz.
(2)
Maximum MEP step size is based on worst-case process, maximum temperature and maximum voltage. MEP step size will increase
with low voltage and high temperature and decrease with voltage and cold temperature.
Applications that use the HRPWM feature should use MEP Scale Factor Optimizer (SFO) estimation software functions. See the TI
software libraries for details of using SFO function in end applications. SFO functions help to estimate the number of MEP steps per
SYSCLKOUT period dynamically while the HRPWM is in operation.
Copyright 2010–2012, Texas Instruments Incorporated
Peripheral and Electrical Specifications
133
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