tmp89fm82t TOSHIBA Semiconductor CORPORATION, tmp89fm82t Datasheet - Page 314

• Manufacturer Part Number: tmp89fm82t
• Description: 8 Bit Microcontroller
• Manufacturer: TOSHIBA Semiconductor CORPORATION

19.5
Three-phase PWM Output Unit
PMD period register
PMD compare register
PWM synchroniaing clock
CMPU, V, W Register is updated with PWM period.
results from the waveform arithmetic circuit and by using the results as CMPU, V, W Register set value, it
outputs independent three-phase PWM waveforms. When the waveform calculation function is enabled and
transfer of calculation results into the CMPU to W Registers is enabled (EDCRA<RWREN>="1"), the CMPU
to W Registers are disabled against writing.
results into the CMPU, V, W Registers is disabled (EDCRA<RWREN>="0"), the calculation results are
transferred to the CMPU, V, W Registers, but are not transferred to the buffer of CMPU, V, W Registers.
circuit that have been input to a buffer. After changing the read calculation result data by software, writing
the changed data to the CMPU, V, and W registers enables an arbitrary waveform other than a sine wave to
be output. When the registers are read after writing, the values written to the registers are read out until the
calculation results are transferred after calculation is finished.
15 - - -
15 - - -
15 - - -
- - - -
The PMD Period Register (MDPRD) and CMPU, V, W Registers are comprised of dual-buffers, so that
When the waveform arithmetic circuit is operating, the PWM waveform output unit receives calculation
When the waveform calculation function is enabled (EDCRA<CALC>="1") and transfer of calculation
Read-accessing the CMPU, V, and W registers can read the calculation results of the waveform arithmetic
SPWMU
SPWMV
SPWMW
MDPRD
CMPW
CMPU
CMPV
11~0
11~0
11~0
11~0
Figure 19-9 Pulse Width Modulation Circuit
PWM
Selector/
Selector/
Buffer W
Buffer U
Buffer V
Latch
Latch
Up/Down
PMD contorl register A
7 6
MDCRA
-
3
-
MDCNT
3, 2, 1
11~0
PWM counter
Page 298
0
Three-phase
Three-phase
independent
common
selector
output
7
PMD control register B
-
2
MDCRB
-
-
Clock selector
- 2 1, 0
PWMU
PWMX
PWMV
PWMY
PWMW
PWMZ
fx/2
fx/2
fx/2
2
fx
3
2
1
Stop MDCNT
PWM interrupt request
INTPWM
2
Prescaler
3
2
2
2
1
TMP89FM82T
fx