M32CSLASH86 datasheet(195/505 Pages) RENESAS

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16. Three-Phase Motor Control Timer Functions

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16. Three-Phase Motor Control Timer Functions

Three-phase motor driving waveform can be output by using the timers A1, A2, A4 and B2. Table 16.1 lists

specifications of the three-phase motor control timer functions. Table 16.2 lists pin settings. Figure 16.1

shows a block diagram. Figures 16.2 to 16.7 show registers associated with the three-phase motor control

timer functions.

Table 16.1 Three-Phase Motor Control Timer Functions Specification

Item

Specification

Three-Phase Waveform Output Pin

___

Six pins (U, U, V, V, W, W)

Forced Cutoff(1)

_______

Apply a low-level ("L") signal to the NMI pin

Timers to be Used

Timer A4, A1, A2 (used in 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 timer mode):

Carrier wave cycle control

Dead time timer (three 8-bit timers share reload register):

Dead time control

Output Waveform

Triangular wave modulation, Sawtooth wave modulation

Can output a high-level waveform or a low-level waveform for one cycle;

Can set positive-phase level and negative-phase level separately

Carrier Wave Cycle

Triangular wave modulation:

count source x (m+1) x 2

Sawtooth wave modulation:

count source x (m+1)

m: setting value of the TB2 register, 000016 to FFFF16

Count source: f1, f8, f2n(2), fc32

Three-Phase PWM Output Width

Triangular wave modulation:

count source x n x 2

Sawtooth wave modulation:

count source x n

n : setting value of the TA4, TA1 and TA2 register (of the TA4, TA41, TA1, TA11,

TA2 and TA21 registers when setting the INV11 bit to "1"), 000116 to FFFF16

Count source: f1, f8, f2n(2), fc32

Dead Time

Count source x p, or no dead time

p: setting value of the DTT register, 0116 to FF16

Count source: f1, or f1 divided by 2

Active Level

Selected from a high level ("H") or low level ("L")

Positive- and Negative-Phase Con-

Positive and negative-phases concurrent active disable function

current Active Disable Function

Positive and negative-phases concurrent active detect function

Interrupt Frequency

For the timer B2 interrupt, one carrier wave cycle-to-cycle basis through 15

time- carrier wave cycle-to-cycle basis can be selected

NOTES:

_______

1. Forced cutoff by the signal applied to the NMI pin is available when the INV02 bit is set to "1" (three-

phase motor control timer functions) and the INV03 bit is set to "1" (three-phase motor control timer

output enabled).

2. The CNT3 to CNT0 bits in the TCSPR register select no division (n=0) or divide-by-2n (n=1 to 15).

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