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M32C/8A 데이터시트(PDF) 210 Page - Renesas Technology Corp

부품명 M32C/8A
상세설명  RENESAS MCU M16C FAMILY / M32C/80 Series
PDF  372 Pages
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제조업체  RENESAS [Renesas Technology Corp]
홈페이지  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

M32C/8A 데이터시트(HTML) 210 Page - Renesas Technology Corp

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M32C/8A Group
16. Three-Phase Motor Control Timer Function
Rev.1.00
Jul 15, 2007
Page 193 of 352
REJ09B0385-0100
16.2
Sawtooth Wave Modulation Mode
In sawtooth wave modulation mode, one cycle of carrier waveform consists of one timer B2 underflow cycle.
A timer Ai one-shot pulse (i = 1, 2, and 4) is generated by using a timer B2 underflow signal as a trigger. One timer
Ai one-shot pulse is used to output one cycle of the PWM waveform. Table 16.4 lists specifications and settings of
sawtooth wave modulation mode.
Table 16.4
Specifications and Settings of Sawtooth Wave Modulation Mode
m: Value of the TB2 register
ak: Value set to the TAi register at k-th time.
Item
Three-Phase Mode 0
INV06 bit
1
INV11 bit
0
Bits INV01 and INV00
00b or 01b
PWCON bit
0
ICTB2 register
n
INV16 bit
0
Carrier wave cycle
Upper arm active level output
width
Timer B2 interrupt generation
timing
Every n-th timer B2 underflow
Timer B2 reload timing
Timer B2 underflow
Transfer timing from IDBp
register to three-phase output
shift register (p = 0, 1)
Every time a transfer trigger occurs.
Dead time timer start timing
At the falling edge of the one-shot pulse of timer A1, A2 and A4
1
f1
× (m + 1)
× ak
1
f1



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