参数资料
| 型号： | AT32UC3A0256-ALUT |
| 厂商： | Atmel |
| 文件页数： | 87/97页 |
| 文件大小： | 0K |
| 描述： | IC MCU AVR32 256KB FLASH 144LQFP |
| 产品培训模块： | AVR UC3 Audio Application MCU Product Line Introduction AVR EVK1105 Digital Audio Gateway Kit AVR® UC3 Introduction |
| 标准包装： | 300 |
| 系列： | AVR®32 UC3 A0 |
| 核心处理器： | AVR |
| 芯体尺寸： | 32-位 |
| 速度： | 66MHz |
| 连通性： | EBI/EMI，以太网，I²C，SPI，SSC，UART/USART，USB OTG |
| 外围设备： | 欠压检测/复位，POR，PWM，WDT |
| 输入/输出数： | 109 |
| 程序存储器容量： | 256KB（256K x 8） |
| 程序存储器类型： | 闪存 |
| RAM 容量： | 64K x 8 |
| 电压 - 电源 (Vcc/Vdd)： | 1.65 V ~ 1.95 V |
| 数据转换器： | A/D 8x10b |
| 振荡器型： | 内部 |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 144-LQFP |
| 包装： | 托盘 |
| 配用： | ATSTK600-RC33-ND - STK600 ROUTING CARD AVR ATEVK1105-ND - KIT EVAL FOR AT32UC3A0 ATAVRONEKIT-ND - KIT AVR/AVR32 DEBUGGER/PROGRMMR ATEVK1100-ND - KIT DEV/EVAL FOR AVR32 AT32UC3A |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页第49页第50页第51页第52页第53页第54页第55页第56页第57页第58页第59页第60页第61页第62页第63页第64页第65页第66页第67页第68页第69页第70页第71页第72页第73页第74页第75页第76页第77页第78页第79页第80页第81页第82页第83页第84页第85页第86页当前第87页第88页第89页第90页第91页第92页第93页第94页第95页第96页第97页
2006 Microchip Technology Inc.
DS70119E-page 87
dsPIC30F6010
15.1
PWM Time Base
The PWM time base is provided by a 15-bit timer with
a prescaler and postscaler. The time base is accessible
via the PTMR SFR. PTMR<15> is a Read Only Status
bit, PTDIR, that indicates the present count direction of
the PWM time base. If PTDIR is cleared, PTMR is
counting upwards. If PTDIR is set, PTMR is counting
downwards. The PWM time base is configured via the
PTCON SFR. The time base is enabled/disabled by
setting/clearing the PTEN bit in the PTCON SFR.
PTMR is not cleared when the PTEN bit is cleared in
software.
The PTPER SFR sets the counting period for PTMR.
The user must write a 15-bit value to PTPER<14:0>.
When the value in PTMR<14:0> matches the value in
PTPER<14:0>, the time base will either Reset to ‘0’, or
reverse the count direction on the next occurring clock
cycle. The action taken depends on the operating
mode of the time base.
The PWM time base can be configured for four different
modes of operation:
Free Running mode
Single Shot mode
Continuous Up/Down Count mode
Continuous Up/Down Count mode with interrupts
for double updates
These four modes are selected by the PTMOD<1:0>
bits in the PTCON SFR. The Up/Down Counting modes
support center-aligned PWM generation. The Single
Shot mode allows the PWM module to support pulse
control of certain Electronically Commutative Motors
(ECMs).
The interrupt signals generated by the PWM time base
depend on the mode selection bits (PTMOD<1:0>) and
the postscaler bits (PTOPS<3:0>) in the PTCON SFR.
15.1.1
FREE RUNNING MODE
In the Free Running mode, the PWM time base counts
upwards until the value in the Time Base Period regis-
ter (PTPER) is matched. The PTMR register is reset on
the following input clock edge and the time base will
continue to count upwards as long as the PTEN bit
remains set.
When the PWM time base is in the Free Running mode
(PTMOD<1:0> = 00), an interrupt event is generated
each time a match with the PTPER register occurs and
the PTMR register is reset to zero. The postscaler
selection bits may be used in this mode of the timer to
reduce the frequency of the interrupt events.
15.1.2
SINGLE SHOT MODE
In the Single Shot Counting mode, the PWM time base
begins counting upwards when the PTEN bit is set.
When the value in the PTMR register matches the
PTPER register, the PTMR register will be reset on the
following input clock edge and the PTEN bit will be
cleared by the hardware to halt the time base.
When the PWM time base is in the Single Shot mode
(PTMOD<1:0> = 01), an interrupt event is generated
when a match with the PTPER register occurs, the
PTMR register is reset to zero on the following input
clock edge, and the PTEN bit is cleared. The postscaler
selection bits have no effect in this mode of the timer.
15.1.3
CONTINUOUS UP/DOWN
COUNTING MODES
In the Continuous Up/Down Counting modes, the PWM
time base counts upwards until the value in the PTPER
register is matched. The timer will begin counting
downwards on the following input clock edge. The
PTDIR bit in the PTMR SFR is read only and indicates
the counting direction The PTDIR bit is set when the
timer counts downwards.
In the Up/Down Counting mode (PTMOD<1:0> = 10),
an interrupt event is generated each time the value of
the PTMR register becomes zero and the PWM time
base begins to count upwards. The postscaler selec-
tion bits may be used in this mode of the timer to reduce
the frequency of the interrupt events.
Note:
If the period register is set to 0x0000, the
timer will stop counting, and the interrupt
and the special event trigger will not be
generated, even if the special event value
is also 0x0000. The module will not update
the period register, if it is already at
0x0000; therefore, the user must disable
the module in order to update the period
register.
相关PDF资料 |
PDF描述 |
|---|---|
| UX60SC-MB-5S8 | CONN RCPT MINI USB2.0 5POS SLD |
| ZX62D-B-5P8 | CONN RCPT MCR USB B SMD TH SHLL |
| AT91SAM7X256B-AU | IC MCU 256KB FLASH 100LQFP |
| ATMEGA165PV-8MU | IC AVR MCU 16K 8MHZ 64-QFN |
| AT32UC3C1256C-AUT | IC MCU AVR32 256K FLASH 100TQFP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| AT32UC3A0256AU-ALUT | 功能描述:32位微控制器 - MCU 256KB Flash Audio 85Deg RoHS:否 制造商:Texas Instruments 核心:C28x 处理器系列:TMS320F28x 数据总线宽度:32 bit 最大时钟频率:90 MHz 程序存储器大小:64 KB 数据 RAM 大小:26 KB 片上 ADC:Yes 工作电源电压:2.97 V to 3.63 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:LQFP-80 安装风格:SMD/SMT |
| AT32UC3A0256-CTUR | 功能描述:32位微控制器 - MCU 256KB, 144FFBGA Ind RoHS:否 制造商:Texas Instruments 核心:C28x 处理器系列:TMS320F28x 数据总线宽度:32 bit 最大时钟频率:90 MHz 程序存储器大小:64 KB 数据 RAM 大小:26 KB 片上 ADC:Yes 工作电源电压:2.97 V to 3.63 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:LQFP-80 安装风格:SMD/SMT |
| AT32UC3A0256-CTUT | 功能描述:32位微控制器 - MCU 256KB, 144FFBGA Ind RoHS:否 制造商:Texas Instruments 核心:C28x 处理器系列:TMS320F28x 数据总线宽度:32 bit 最大时钟频率:90 MHz 程序存储器大小:64 KB 数据 RAM 大小:26 KB 片上 ADC:Yes 工作电源电压:2.97 V to 3.63 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:LQFP-80 安装风格:SMD/SMT |
| AT32UC3A0512 | 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:AVR32 32-Bit Microcontroller |
| AT32UC3A0512_08 | 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:AVR32 32-Bit Microcontroller |
发布紧急采购，3分钟左右您将得到回复。