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| 型号： | TMX320C2811PGFQ |
| 厂商： | Texas Instruments, Inc. |
| 元件分类： | 数字信号处理 |
| 英文描述： | TMS320R2811, TMS320R2812 Digital Signal Processors |
| 中文描述： | TMS320R2811，TMS320R2812数字信号处理器 |
| 文件页数： | 56/147页 |
| 文件大小： | 2021K |
| 代理商： | TMX320C2811PGFQ |
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Peripherals
56
June 2004
SPRS257
A programmable prescaler for internal or external clock inputs
Control and interrupt logic, for four maskable interrupts:
underflow
,
overflow
,
timer compare
, and
period
interrupts
A selectable direction input pin (TDIRx) (to count up or down when directional up-/down-count mode is
selected)
The GP timers can be operated independently or synchronized with each other. The compare register
associated with each GP timer can be used for compare function and PWM-waveform generation. There are
three continuous modes of operations for each GP timer in up- or up/down-counting operations. Internal or
external input clocks with programmable prescaler are used for each GP timer. GP timers also provide the
time base for the other event-manager submodules: GP timer 1 for all the compares and PWM circuits, GP
timer 2/1 for the capture units and the quadrature-pulse counting operations. Double-buffering of the period
and compare registers allows programmable change of the timer (PWM) period and the compare/PWM pulse
width as needed.
4.2.2
Full-Compare Units
There are three full-compare units on each event manager. These compare units use GP timer1 as the time
base and generate six outputs for compare and PWM-waveform generation using programmable deadband
circuit. The state of each of the six outputs is configured independently. The compare registers of the compare
units are double-buffered, allowing programmable change of the compare/PWM pulse widths as needed.
4.2.3
Programmable Deadband Generator
Deadband generation can be enabled/disabled for each compare unit output individually. The
deadband-generator circuit produces two outputs (with or without deadband zone) for each compare unit
output signal. The output states of the deadband generator are configurable and changeable as needed by
way of the double-buffered ACTRx register.
4.2.4
PWM Waveform Generation
Up to eight PWM waveforms (outputs) can be generated simultaneously by each event manager: three
independent pairs (six outputs) by the three full-compare units with
programmable deadbands
, and two
independent PWMs by the GP-timer compares.
4.2.5
Double Update PWM Mode
The R281x Event Manager supports “Double Update PWM Mode.” This mode refers to a PWM operation
mode in which the position of the leading edge and the position of the trailing edge of a PWM pulse are
independently modifiable in each PWM period. To support this mode, the compare register that determines
the position of the edges of a PWM pulse must allow (buffered) compare value update once at the beginning
of a PWM period and another time in the middle of a PWM period. The compare registers in R281x Event
Managers are all buffered and support three compare value reload/update (value in buffer becoming active)
modes. These modes have earlier been documented as compare value reload conditions. The reload
condition that supports double update PWM mode is reloaded on Underflow (beginning of PWM period) OR
Period (middle of PWM period). Double update PWM mode can be achieved by using this condition for
compare value reload.
4.2.6
PWM Characteristics
Characteristics of the PWMs are as follows:
16-bit registers
Wide range of programmable deadband for the PWM output pairs
Change of the PWM carrier frequency for PWM frequency wobbling as needed
A
相关PDF资料 |
PDF描述 |
|---|---|
| TMX320C2811PGFS | TMS320R2811, TMS320R2812 Digital Signal Processors |
| TMX320C2811ZHHA | TMS320R2811, TMS320R2812 Digital Signal Processors |
| TMX320C2811ZHHQ | CTV 22C 22#22D SKT RECP |
| TMX320C2811ZHHS | TMS320R2811, TMS320R2812 Digital Signal Processors |
| TMX320C2812GHHA | TMS320R2811, TMS320R2812 Digital Signal Processors |
相关代理商/技术参数 |
参数描述 |
|---|---|
| TMX320C2811PGFS | 制造商:TI 制造商全称:Texas Instruments 功能描述:TMS320R2811, TMS320R2812 Digital Signal Processors |
| TMX320C2811ZHHA | 制造商:TI 制造商全称:Texas Instruments 功能描述:TMS320R2811, TMS320R2812 Digital Signal Processors |
| TMX320C2811ZHHQ | 制造商:TI 制造商全称:Texas Instruments 功能描述:TMS320R2811, TMS320R2812 Digital Signal Processors |
| TMX320C2811ZHHS | 制造商:TI 制造商全称:Texas Instruments 功能描述:TMS320R2811, TMS320R2812 Digital Signal Processors |
| TMX320C2812GHHA | 制造商:TI 制造商全称:Texas Instruments 功能描述:TMS320R2811, TMS320R2812 Digital Signal Processors |
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