参数资料
型号: MC68HC11ED0CFN2
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: 8-BIT, 2 MHz, MICROCONTROLLER, PQCC44
封装: PLASTIC, LCC-44
文件页数: 96/108页
文件大小: 1672K
代理商: MC68HC11ED0CFN2
Technical Summary
MC68HC11ED0 — Rev. 1.0
Timing System
Timing System
9.2 Introduction
The timing system is based on a free-running 16-bit counter with a
four-stage programmable prescaler. A timer overflow function allows
software to extend the system’s timing capability beyond the counter’s
16-bit range.
The timer has:
Three channels for input capture
Four channels for output compare
One channel that can be configured as a fourth input capture or a
fifth output compare
In addition, the timing system includes pulse accumulator and real-time
interrupt (RTI) functions, as well as a clock monitor function, which can
be used to detect clock failures that are not detected by the computer
operating properly (COP. Refer to 9.4 Pulse Accumulator for further
information about these functions.
Table 9-1 provides a summary of the crystal-related frequencies and
periods. A block diagram of the timer system is shown in Figure 9-1.
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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