NEC V850E/PH2, User Manual

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Chapter 10 16-bit Inverter Timer/Counter R
User’s Manual U16580EE3V1UD00
(6) Additional pulse control in high-accuracy T-PWM mode
In the high-accuracy T-PWM mode, additional pulse can be set by setting the LSB of the duty
setting registers (TRnCCR1 to TRnCCR3) to “1”. With the additional pulse control function, finer
duty control can be performed (higher accuracy).
TORn1 pin output examples are provided below for when additional pulse control is and is not
performed. The settings used here are TRnCCR = 12, TRnDTC0, and TRnDTC1 = 0.
Figure 10-61: TORn1 Pin Output Example When Performing Additional Pulse Control
Remarks: 1. TRnCCR0 = 12, TRnDTC0 = 0, TRnDTC1 = 0
2. n = 0, 1
The locations where additional pulse control is performed are when an odd value has been set to
the TRnCCR1 register.
In the above figure, the arrows and numbers indicate the duty width of the TORn1 pin output within
1 cycle.
As can be seen in the above figure, when additional pulse control is performed, the output width
(duty ratio) of pin TORn1 can be controlled in 1 count clock steps from 12 clocks to 0 clocks.
0 2 4 6 8 10 12 10 8 6 4 2 0 2 4
11
10
9
8
7
6
5
4
3
2
1
0
12
TRnCCR1 = 0
TRnCCR1 = 1
TRnCCR1 = 2
TRnCCR1 = 3
TRnCCR1 = 4
TRnCCR1 = 5
TRnCCR1 = 6
TRnCCR1 = 7
TRnCCR1 = 8
TRnCCR1 = 9
TRnCCR1 = 10
TRnCCR1 = 11
TRnCCR1 = 12
1 2 3 4 5 6 7 8 9 10 11 12
Count clock
Counter value