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HCS12 数据表(PDF) 341 Page - Freescale Semiconductor, Inc

部件名 HCS12
功能描述  HCS12 Microcontrollers
PDF  452 Pages
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制造商  FREESCALE [Freescale Semiconductor, Inc]
网页  http://www.freescale.com
标志 FREESCALE - Freescale Semiconductor, Inc

HCS12 数据表(HTML) 341 Page - Freescale Semiconductor, Inc

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S12CPUV2 Reference Manual, Rev. 4.0
Freescale Semiconductor
341
percent true ($40). The value $40 is stored to a random-access memory
(RAM) location and is called a fuzzy input (in this case, the fuzzy input for
“temperature is warm”). There is a RAM location for each fuzzy input (for
each label of each system input).
Figure 9-2. Fuzzification Using Membership Functions
When the fuzzification step begins, the current value of the system input is
in an accumulator of the CPU12, one index register points to the first
membership function definition in the knowledge base, and a second index
register points to the first fuzzy input in RAM. As each fuzzy input is
calculated by executing a MEM instruction, the result is stored to the fuzzy
input and both pointers are updated automatically to point to the locations
associated with the next fuzzy input. The MEM instruction takes care of
everything except counting the number of labels per system input and
loading the current value of any subsequent system inputs.
The end result of the fuzzification step is a table of fuzzy inputs representing
current system conditions.
$00
$80
$FF
0
°F32°F64°F96°F
128
°F
$40
$C0
HOT
$00
$80
$FF
0
°F32°F64°F96°F
128
°F
$40
$C0
WARM
$00
$80
$FF
0
°F32°F64°F96°F
128
°F
$40
$C0
COLD
CURRENT
IS 64
°F
TEMPERATURE
MEMBERSHIP FUNCTIONS
FOR TEMPERATURE
FUZZY INPUTS
TEMPERATURE IS HOT
TEMPERATURE IS WARM
TEMPERATURE IS COLD
$00
$40
$C0



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