SH7137_09 Datasheet, PDF (11/24 Pages) Renesas Technology Corp – Output of Complementary Pairs of PWM Signals in Three Phases

SH7280 Group
MTU2: Output of Complementary Pairs of PWM Signals in Three Phases
(Complementary PWM Mode)
(a) TGRB_3 = TGRA_3
TCNT_3 and TCNT_4
TGRB_3 (= TGRA_3) TGRA_3
Td
TCDR
TDDR
H'0000
TCNT_3
TCNT_4
TIOC3B pin
(PWM output 1, positive)
1
0
TIOC3D pin
1
(PWM output 1', inverse phase) ₀
Fixed to OFF (high)
Fixed to ON (low)
(b) TGRB_3 = TCDR
TCNT_3 and TCNT_4
TGRA_3
Td
TGRB_3 (= TCDR) TCDR
TCNTS
TCNTS
TGRB_3: Value of comparison register
: Active level (low)
Td:
Short-circuit prevention interval setting
TCNT_3
TDDR
TCNT_4
H'0000
TIOC3B pin
(PWM output 1, positive)
1
0
TIOC3D pin
1
(PWM output 1', inverse phase) ₀
Short-circuit
prevention interval
Fixed to OFF (high)
Short-circuit
prevention interval
ON (low)
OFF
(c) TGRB_3 = TCDR − Td
TCNT_3 and TCNT_4
TGRA_3
Td
TCDR
TGRB_3 (= TCDR − Td)
Td
TCNTS
TCNT_3
Short-circuit
prevention interval
Short-circuit
prevention interval
OFF
TDDR
TCNT_4
H'0000
TIOC3B pin
(PWM output 1, positive)
1
0
TIOC3D pin
1
(PWM output 1', inverse phase) 0
Short-circuit
prevention interval
OFF (high)
ON
ON (low)
OFF
Short-circuit
prevention interval
OFF
OFF
Figure 9 Examples of PWM Waveform Output (1)
REJ06B0887-0100/Rev.1.00
June 2009
Page 11 of 24