Section 9 Multi-Function Timer Pulse Unit 2 (MTU2)
Rev. 3.00 Sep. 27, 2007 Page 266 of 758
REJ09B0243-0300
9.4.7 Reset-Synchronized
PWM
Mode
In the reset-synchronized PWM mode, three-phase output of positive and negative PWM
waveforms that share a common wave transition point can be obtained by combining channels 3
and 4.
When set for reset-synchronized PWM mode, the TIOC3B, TIOC3D, TIOC4A, TIOC4C,
TIOC4B, and TIOC4D pins function as PWM output pins and TCNT_3 functions as an upcounter.
Table 9.52 shows the PWM output pins used. Table 9.53 shows the settings of the registers.
Table 9.52 Output Pins for Reset-Synchronized PWM Mode
Channel Output
Pin Description
3
TIOC3B
PWM output pin 1
TIOC3D
PWM output pin 1' (negative-phase waveform of PWM output 1)
4
TIOC4A
PWM output pin 2
TIOC4C
PWM output pin 2' (negative-phase waveform of PWM output 2)
TIOC4B
PWM output pin 3
TIOC4D
PWM output pin 3' (negative-phase waveform of PWM output 3)
Table 9.53 Register Settings for Reset-Synchronized PWM Mode
Register
Description of Setting
TCNT_3
Initial setting of H'0000
TCNT_4
Initial setting of H'0000
TGRA_3
Set count cycle for TCNT_3
TGRB_3
Sets the turning point for PWM waveform output by the TIOC3B and TIOC3D pins
TGRA_4
Sets the turning point for PWM waveform output by the TIOC4A and TIOC4C pins
TGRB_4
Sets the turning point for PWM waveform output by the TIOC4B and TIOC4D pins
Содержание SH7124 R5F7124
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