参数资料
型号: SAB-C515-LM
厂商: INFINEON TECHNOLOGIES AG
元件分类: 微控制器/微处理器
英文描述: 8-BIT, 16 MHz, MICROCONTROLLER, PQFP80
封装: PLASTIC, MQFP-80
文件页数: 138/162页
文件大小: 771K
代理商: SAB-C515-LM
Semiconductor Group
6-34
On-Chip Peripheral Components
C515
Figure 6-18
Modulation Range of a PWM Signal, generated with a Timer 2/CCx Register Combination in
Compare Mode 0*
The following example shows how to calculate the modulation range for a PWM signal. To calculate
with reasonable numbers, a reduction of the resolution to 8-bit is used. Otherwise (for the maximum
resolution of 16-bit) the modulation range would be so severely limited that it would be negligible.
Example:
Timer 2 in auto-reload mode; contents of reload register CRC = FF00H
Restriction of modulation range = 1 / 256 x 2 x 100% = 0.195%
This leads to a variation of the duty cycle from 0.195% to 99.805% for a timer 2/CCx register
configuration when 8 of 16 bits are used.
MCT01907
H
L
P1.x
CCHx/CCLx = 0000 or = CRCH/CRCL (maximum duty cycle)
P1.x
L
H
CCHx/CCLx = FFFF (minimum duty cycle)
Appr. 1/2 Machine Cycle
a)
b)
Appr. 1/2 Machine Cycle
H
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