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Rev.2.00 Nov 28, 2005 page 138 of 378
REJ09B0124-0200
M16C/6N Group (M16C/6NK, M16C/6NM) 14. Three-Phase Motor Control Timer Function
Under development
This document is under development and its contents are subject to change.
14. Three-Phase Motor Control Timer Function
Timers A1, A2, A4 and B2 can be used to output three-phase motor drive waveforms. Table 14.1 lists the
specifications of the three-phase motor control timer function. Figure 14.1 shows the block diagram for three-phase
motor control timer function. Also, the related registers are shown on Figures 14.2 to 14.8.
Table 14.1 Three-Phase Motor Control Timer Function Specifications
Item Specification
Three-Phase Waveform Output Pin
___ ___ ___
Six pins (U, U, V, V, W, W)
Forced Cutoff Input
(1)
_______
Input “L” to NMI pin
Used Timers Timer A4, A1, A2 (used in the one-shot timer mode)
___
• Timer A4: U- and U-phase waveform control
___
• Timer A1: V- and V-phase waveform control
___
• Timer A2: W- and W-phase waveform control
Timer B2 (used in the timer mode)
• Carrier wave cycle control
Dead time timer (3 eight-bit timer and shared reload register)
• Dead time control
Output Waveform Triangular wave modulation, Sawtooth wave modification
• Enable to output “H” or “L” for one cycle
•
Enable to set positive-phase level and negative-phase level respectively
Carrier Wave Cycle Triangular wave modulation: count source ✕ (m+1) ✕ 2
Sawtooth wave modulation: count source ✕ (m+1)
m: Setting value of the TB2 register, 0000h to FFFFh
Count source: f1, f2, f8, f32, fC32
Three-Phase PWM Output Width Triangular wave modulation: count source ✕ n ✕ 2
Sawtooth wave modulation: count source ✕ n
n: Setting value of the TA4, TA1 and TA2 registers (of the TA4,
TA41, TA1, TA11, TA2 and TA21 registers when setting the
INV11 bit to “1”), 0001h to FFFFh
Count source: f1, f2, f8, f32, fC32
Dead Time Count source ✕ p, or no dead time
p: Setting value of the DTT register, 01h to FFh
Count source: f1, f2, f1 divided by 2, f2 divided by 2
Active Level Enable to select “H” or “L”
Positive and Negative-Phase Concurrent
Positive and negative-phases concurrent active disable function
Active Disable Function Positive and negative-phases concurrent active detect function
Interrupt Frequency For Timer B2 interrupt, select a carrier wave cycle-to-cycle basis
through 15 times carrier wave cycle-to-cycle basis
NOTE:
1.
_______
Forced cutoff with NMI input is effective when the IVPCR1 bit in the TB2SC register is set to “1” (three-phase
_______ _______
output forcible cutoff by NMI input enabled). If an “L” signal is applied to the NMI pin when the IVPCR1
bit is “1”, the related pins go to a high-impedance state regardless of which functions of those pins are
being used.
Related pins: • P7_2/CLK2/TA1OUT/V
_________ _________ ___
• P7_3/CTS2/RTS2/TA1IN/V
• P7_4/TA2OUT/W/(CLK4)
____
• P7_5/TA2IN/W/(SOUT4)
• P8_0/TA4OUT/U(SIN4)
___
• P8_1/TA4IN/U