Datasheet

V850ES/JG3-H, V850ES/JH3-H CHAPTER 11 MOTOR CONTROL FUNCTION
R01UH0042EJ0500 Rev.5.00 Page 600 of 1513
Aug 12, 2011
Figure 11-12. PWM Output Waveform with Dead Time (2)
(a) 0% output (TAB1CCRm register = M + 1, TAB1CCR0 register = M, TAB1DTC register = a)
16-bit
counter
000H (dead-time counter m does not count)
H
L
L
0000H
TOAB1m signal
(internal signal)
Dead-time
counter m
TOAB1Tm
pin output
TOAB1Bm
pin output
(b) In vicinity of 0% output (TAB1CCRm register = i ≥ M + 1 − a/2, TAB1CCR0 register = M, TAB1DTC register = a)
Dead-time counter is cleared and counts again
Negative-phase output width: (M + 1 − i) × 2 + a
(e.g., output width is 2 + a where TAB1CCRm register = M)
L
16-bit
counter
0000H
TOAB1m signal
(internal signal)
Dead-time
counter m
TOAB1Tm
pin output
TOAB1Bm
pin output
000H
(c) In vicinity of 100% output (TAB1CCRm register = i ≤ a/2, TAB1CCR0 register = M, TAB1DTC register = a)
Counter is cleared and counts again
Positive-phase output width: (M + 1 − i) × 2 − a)
(e.g., output width is 2 − a where TAB1CCRm register = 0001H.)
16-bit
counter
0000H
TOAB1m signal
(internal signal)
Dead-time
counter m
TOAB1Tm
pin output
TOAB1Bm
pin output
000H
(d) 100% output (TAB1CCRm register = 0000H, TAB1CCR0 register = M, TAB1DTC register = a)
000H (dead-time counter m does not count)
16-bit
counter
0000H
TOAB1m signal
(internal signal)
Dead-time
counter m
TOAB1Tm
pin output
TOAB1Bm
pin output
Remark m = 1 to 3