参数资料
型号: SAB-C167CS-4R33M
厂商: INFINEON TECHNOLOGIES AG
元件分类: 微控制器/微处理器
英文描述: 16-BIT, MROM, 33 MHz, MICROCONTROLLER, PQFP144
封装: METRIC, PLASTIC, QFP-144
文件页数: 59/84页
文件大小: 1082K
代理商: SAB-C167CS-4R33M
C167CS-4R
C167CS-L
Data Sheet
58
V2.2, 2001-08
Direct Drive
When direct drive is configured (CLKCFG = 011B) the on-chip phase locked loop is
disabled and the CPU clock is directly driven from the internal oscillator with the input
clock signal.
The frequency of
fCPU directly follows the frequency of fOSC so the high and low time of
fCPU (i.e. the duration of an individual TCL) is defined by the duty cycle of the input clock
fOSC.
The timings listed below that refer to TCLs therefore must be calculated using the
minimum TCL that is possible under the respective circumstances. This minimum value
can be calculated via the following formula:
TCLmin = 1/fOSC × DCmin
(DC = duty cycle)
For two consecutive TCLs the deviation caused by the duty cycle of
fOSC is compensated
so the duration of 2TCL is always 1/
fOSC. The minimum value TCLmin therefore has to
be used only once for timings that require an odd number of TCLs (1, 3, …). Timings that
require an even number of TCLs (2, 4, …) may use the formula 2TCL = 1/
fOSC.
相关PDF资料
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SAB-C167CS-4RM 16-BIT, MROM, 25 MHz, MICROCONTROLLER, PQFP144
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