tmp88fw45afg TOSHIBA Semiconductor CORPORATION, tmp88fw45afg Datasheet - Page 167

• Manufacturer Part Number: tmp88fw45afg
• Description: 8 Bit Microcontroller Tlcs-870/x Series
• Manufacturer: TOSHIBA Semiconductor CORPORATION

PWMU waveform
PWMU waveform
[Sawtooth wave]
[Triangular wave]
Counter (MDCNT) are compared for the relative magnitude by the comparator to produce PWM waveforms.
ture. 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 struc-
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 produce
[MDPRD]
[MDPRD]
[CMPU]
[CMPU]
Registers to produce three-phase independent PWM waveforms. This method may be used to
produce sinusoidal or any other desired drive waveforms.
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 14-9 PWM Waveforms
Data update
Page 153
Data update
TMP88FW45AFG
Time
Time