M3087BFLBGP#U5 Renesas Electronics America, M3087BFLBGP#U5 Datasheet - Page 236

• Manufacturer Part Number: M3087BFLBGP#U5
• Description: IC M32C/87 MCU FLASH 144LQFP
• Manufacturer: Renesas Electronics America
• Series: M16C™ M32C/80r

Specifications of M3087BFLBGP#U5

• Core Processor: M32C/80
• Core Size: 16/32-Bit
• Speed: 32MHz
• Connectivity: EBI/EMI, I²C, IEBus, IrDA, SIO, UART/USART
• Peripherals: DMA, POR, PWM, WDT
• Number Of I /o: 121
• Program Memory Size: 1MB (1M x 8)
• Program Memory Type: FLASH
• Ram Size: 48K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 5.5 V
• Data Converters: A/D 34x10b, D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 85°C
• Package / Case: 144-LQFP
• For Use With: R0K330879S001BE - KIT DEV RSK M32C/87R0K330879S000BE - KIT DEV RSK M32C/87
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

M32C/87 Group (M32C/87, M32C/87A, M32C/87B)
REJ09B0180-0151 Rev.1.51 Jul 31, 2008
Page 212 of 587
Figure 16.14
Figure 16.14 shows an example of the sawtooth wave modulation operation.
Sawtooth Waveform as a Carrier Wave
INVC1 register = 0
INVC1 register = 1
Timer A4 start trigger signal
NOTE:
The above applies under the following conditions:
- INVC0 register: INV01 bit = 0 (ICTB2 counter is incremented by 1 when timer B2 underflows)
- INVC1 register: INV10 bit = 0 (Timer B2 underflow)
- ICTB2 register = 01h (Timer B2 interrupt is generated every timer B2 underflow)
- TB2SC register: PWCON bit = 0 (Timer B2 underflow)
The following shows examples to change PWM output levels.
- Default value of the timer: TA4 = a
First time TA4 = a
- Default value of the registers IDB0 and IDB1: DU0 = 0, DUB0 = 1, DU1 = 1, and DUB1 = 1
They are changed to DU0 = 1, DUB0 = 0, DU1 = 1, and DUB1 = 1 at the fourth timer B2 interrupt.
IR bit in the TB2IC register
Timer A4 one-shot pulse
1. Internal signals. See Three-Phase Motor Control Timer Function Block Diagram.
(Active High)
(Active Low)
INV14 bit in
INV14 bit in
Upper arm (U-phase)
Lower arm (U-phase)
TABSR register
Sawtooth Wave Modulation Operation
TB2S bit in the
output signal
output signal
TA4 register
INV02 bit = 1 (Three-phase motor control timer function used)
INV03 bit = 1 (Three-phase motor control timer output enabled)
INV06 bit = 1 (Sawtooth wave modulation mode)
INV11 bit = 0 (Timers A11, A21, A41 not used (Three-phase mode 0))
INV15 bit = 0 (Dead time enabled)
INV16 bit = 0 (Falling edge of one-shot pulse of timers A1, A2, and A4)
Timer B2
U-phase
U-phase
U-phase
U-phase
Carrier wave
2
Signal wave
, second time TA4 = a
(1)
(1)
(1)
(1)
Values are transferred to the three-phase output shift register from registers IDB0 and IDB1
1
a
(The TA4 register is changed every time the timer B2 interrupt occurs.)
1
DUB0 = 1
DU0 = 0
a
1
3
DU1 = 1
, third time TA4 = a
DUB1 = 1
a
2
a
2
a
3
Set to 0 by an interrupt request acknowledgement or by a program
a
4
3
, fourth time = a
Dead time
Dead time
a
4
a
16. Three-Phase Motor Control Timer Function
4
5
a
Rewrite registers IDB0 and IDB1
DU0 = 1
DUB0 = 0
5
a
5
DUB1 = 1
DU1 = 1
a
6
a
6
a
7
a
7
a
8
a
8