tmp88ch40img TOSHIBA Semiconductor CORPORATION, tmp88ch40img Datasheet - Page 85
tmp88ch40img
Manufacturer Part Number
tmp88ch40img
Description
8 Bit Microcontroller
Manufacturer
TOSHIBA Semiconductor CORPORATION
Datasheet
1.TMP88CH40IMG.pdf
(148 pages)
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PWMU waveform
PWMU waveform
[Sawtooth wave]
[Triangular wave]
Counter (MDCNT) are compared for the relative magnitude by the comparator to produce PWM wave-
forms.
structure. The values of the PMD Compare Registers are loaded into their respective comparison registers
synchronously with PWM period.
The values of the PWM Compare Registers (CMPU/V/W) and the carrier wave generated by the PWM
The PWM Counter is a 12-bit up/down counter with a 100 ns (at fc = 20 MHz) resolution.
For three-phase output control, two methods of generating three-phase PWM waveforms can be set.
The three-phase PMD Compare Registers each have a comparison register to comprise a dual-buffer
[MDPRD]
[MDPRD]
1. Three-phase independent mode: Values are set independently in the three-phase PMD Compare
2. Three-phase common mode: A value is set in only the U-phase PMD Compare Register to pro-
[CMPU]
[CMPU]
Registers to produce three-phase independent PWM waveforms. This method may be used to
produce sinusoidal or any other desired drive waveforms.
duce three in-phase PWM waveforms using the U phase set value. This method may be used for
DC motor square wave drive.
MDCNT
MDCNT
n
ff
n
ff
Figure 11-9 PWM Waveforms
Data update
Page 77
Data update
TMP88CH40IMG
Time
Time
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