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| 型號(hào)： | MC68HC11E0 |
| 廠商： | Motorola, Inc. |
| 英文描述： | 8-channel, 8-bit analog-to-digital (A/D) converter |
| 中文描述： | 8通道，8位模擬至數(shù)字（A / D）轉(zhuǎn)換器 |
| 文件頁(yè)數(shù)： | 141/268頁(yè) |
| 文件大小： | 2221K |
| 代理商： | MC68HC11E0 |
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M68HC11E Family — Rev. 5
Data Sheet
MOTOROLA
Timing System
141
Data Sheet — M68HC11E Family
Section 9. Timing System
9.1 Introduction
The M68HC11 timing system is composed of five clock divider chains. The main
clock divider chain includes a 16-bit free-running counter, which is driven by a
programmable prescaler. The main timer’s programmable prescaler provides one
of the four clocking rates to drive the 16-bit counter. Two prescaler control bits
select the prescale rate.
The prescaler output divides the system clock by 1, 4, 8, or 16. Taps off of this main
clocking chain drive circuitry that generates the slower clocks used by the pulse
accumulator, the real-time interrupt (RTI), and the computer operating properly
(COP) watchdog subsystems, also described in this section. Refer to
Figure 9-1
.
All main timer system activities are referenced to this free-running counter. The
counter begins incrementing from $0000 as the MCU comes out of reset and
continues to the maximum count, $FFFF. At the maximum count, the counter rolls
over to $0000, sets an overflow flag, and continues to increment. As long as the
MCU is running in a normal operating mode, there is no way to reset, change, or
interrupt the counting. The capture/compare subsystem features three input
capture channels, four output compare channels, and one channel that can be
selected to perform either input capture or output compare. Each of the three input
capture functions has its own 16-bit input capture register (time capture latch) and
each of the output compare functions has its own 16-bit compare register. All timer
functions, including the timer overflow and RTI, have their own interrupt controls
and separate interrupt vectors.
The pulse accumulator contains an 8-bit counter and edge select logic. The pulse
accumulator can operate in either event counting mode or gated time accumulation
mode. During event counting mode, the pulse accumulator’s 8-bit counter
increments when a specified edge is detected on an input signal. During gated time
accumulation mode, an internal clock source increments the 8-bit counter while an
input signal has a predetermined logic level.
The real-time interrupt (RTI) is a programmable periodic interrupt circuit that
permits pacing the execution of software routines by selecting one of four interrupt
rates.
F
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MC68HC11E0CB2 | 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:8-channel, 8-bit analog-to-digital (A/D) converter |
| MC68HC11E0CB3 | 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:8-channel, 8-bit analog-to-digital (A/D) converter |
| MC68HC11E0CFN2 | 功能描述:IC MCU 2MHZ 52-PLCC RoHS:否 類別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:HC11 其它有關(guān)文件:STM32F101T8 View All Specifications 特色產(chǎn)品:STM32 32-bit Cortex MCUs 標(biāo)準(zhǔn)包裝:490 系列:STM32 F1 核心處理器:ARM? Cortex?-M3 芯體尺寸:32-位 速度:36MHz 連通性:I²C，IrDA，LIN，SPI，UART/USART 外圍設(shè)備:DMA，PDR，POR，PVD，PWM，溫度傳感器，WDT 輸入/輸出數(shù):26 程序存儲(chǔ)器容量:64KB（64K x 8） 程序存儲(chǔ)器類型:閃存 EEPROM 大小:- RAM 容量:10K x 8 電壓 - 電源 (Vcc/Vdd):2 V ~ 3.6 V 數(shù)據(jù)轉(zhuǎn)換器:A/D 10x12b 振蕩器型:內(nèi)部 工作溫度:-40°C ~ 85°C 封裝/外殼:36-VFQFN，36-VFQFPN 包裝:托盤 配用:497-10030-ND - STARTER KIT FOR STM32497-8853-ND - BOARD DEMO STM32 UNIV USB-UUSCIKSDKSTM32-PL-ND - KIT IAR KICKSTART STM32 CORTEXM3497-8512-ND - KIT STARTER FOR STM32F10XE MCU497-8505-ND - KIT STARTER FOR STM32F10XE MCU497-8304-ND - KIT STM32 MOTOR DRIVER BLDC497-6438-ND - BOARD EVALUTION FOR STM32 512K497-6289-ND - KIT PERFORMANCE STICK FOR STM32MCBSTM32UME-ND - BOARD EVAL MCBSTM32 + ULINK-MEMCBSTM32U-ND - BOARD EVAL MCBSTM32 + ULINK2更多... 其它名稱:497-9032STM32F101T8U6-ND |
| MC68HC11E0CFN2R2 | 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Freescale Semiconductor 功能描述: |
| MC68HC11E0CFN3 | 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:Microcontrollers |
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