欧美成人免费电影,国产欧美一区二区三区精品酒店,精品国产a毛片,色网在线免费观看

參數資料
型號: MC68B912B32
廠商: Motorola, Inc.
英文描述: 2.5V 100ppm/Degrees C, 50uA in SOT23-3 Series (Bandgap) Voltage Reference 3-SOT-23 -40 to 125
中文描述: 16位微控制器
文件頁數: 63/128頁
文件大小: 748K
代理商: MC68B912B32
MC68HC912B32
MC68HC912B32TS/D
MOTOROLA
63
11 Pulse-Width Modulator
The pulse-width modulator (PWM) subsystem provides four independent 8-bit PWM waveforms or two
16-bit PWM waveforms or a combination of one 16-bit and two 8-bit PWM waveforms. Each waveform
channel has a programmable period and a programmable duty-cycle as well as a dedicated counter. A
flexible clock select scheme allows four different clock sources to be used with the counters. Each of
the modulators can create independent, continuous waveforms with software-selectable duty rates from
0 percent to 100 percent. The PWM outputs can be programmed as left-aligned outputs or center-
aligned outputs.
The period and duty registers are double buffered so that if they change while the channel is enabled,
the change will not take effect until the counter rolls over or the channel is disabled. If the channel is not
enabled, then writes to the period and/or duty register will go directly to the latches as well as the buffer,
thus ensuring that the PWM output will always be either the old waveform or the new waveform, not
some variation in between.
A change in duty or period can be forced into immediate effect by writing the new value to the duty and/
or period registers and then writing to the counter. This causes the counter to reset and the new duty
and/or period values to be latched. In addition, since the counter is readable it is possible to know where
the count is with respect to the duty value and software can be used to make adjustments by turning
the enable bit off and on.
The four PWM channel outputs share general-purpose port P pins. Enabling PWM pins takes prece-
dence over the general-purpose port. When PWM are not in use, the port pins may be used for discrete
input/output.
Figure 15 Block Diagram of PWM Left-Aligned Output Channel
GATE
PWCNTx
8-BIT COMPARE =
PWDTYx
8-BIT COMPARE =
PWPERx
UP/DOWN
FROM PORT P
DATA REGISTER
TO PIN
DRIVER
PPOLx
CLOCK SOURCE
(PCLK)
(CLOCK EDGE SYNC)
RESET
CENTR = 0
MUX
MUX
S
R
Q
Q
PWPER
PWDTY
PWENx
PPOL = 0
PPOL = 1
相關PDF資料
PDF描述
MC68C912B32FU8 16-Bit Microcontroller
MC68B912B32FU8 16-Bit Microcontroller
MC68C912B32CFU8 16-Bit Microcontroller
MC68CK338 Highly Integrated, Low-Power, 32-Bit Microcontroller
MC68EC060 32-Bit Microprocessors.(32位微處理器)
相關代理商/技術參數
參數描述
MC68B912B32FU8 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:16-Bit Microcontroller
MC68BOOL 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:8-BIT MICROPROCESSING UNIT (MPU)
MC68BOOP 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:8-BIT MICROPROCESSING UNIT (MPU)
MC68BOOS 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:8-BIT MICROPROCESSING UNIT (MPU)
MC68C812A4 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Technical Supplement MC68C812A4 3.3V Electrical Characteristics
主站蜘蛛池模板: 巧家县| 庄浪县| 社旗县| 淮南市| 秦皇岛市| 兴隆县| 红安县| 南阳市| 诏安县| 嵊州市| 旌德县| 苏尼特右旗| 泽州县| 犍为县| 凤阳县| 五河县| 丹江口市| 武鸣县| 丰原市| 罗江县| 临汾市| 上林县| 博罗县| 贡山| 颍上县| 莱芜市| 广东省| 扎兰屯市| 宝丰县| 邛崃市| 遵义市| 璧山县| 大方县| 宜章县| 万安县| 井陉县| 大荔县| 土默特左旗| 镇原县| 毕节市| 新闻|