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ST7MC1K2 数据表(PDF) 259 Page - STMicroelectronics |
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ST7MC1K2 数据表(HTML) 259 Page - STMicroelectronics |
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259 / 371 page  Obsolete Product(s) - Obsolete Product(s) ST7MC1K2-Auto, ST7MC1K6-Auto, ST7MC2S4-Auto, ST7MC2S6-Auto On-chip peripherals 259/371 PWM generator initialization and start-up The three-phase generator counter stays in reset state (that is, stopped and equal to 0), as long as MTC peripheral clock is disabled (CKE = 0). Setting the CKE bit has two actions on the PWM generator: ● It starts the PWM counter ● It forces the update of all registers with preload registers transferred on U update event, that is, MREP, MPCR, MCMP0, MCMPU, MCMPV, MCMPW (in 12-bit mode, both MCMPxL and MCMPxH must have been written, following the mandatory LSB/MSB sequence, before setting CKE bit). It consequently generates a U interrupt. 10.6.11 Low power modes Before executing a HALT or WFI instruction, software must stop the motor, and may choose to put the outputs in high impedance. 10.6.12 Interrupts The MTC interrupt events are connected to the three interrupt vectors (see Section 7: Interrupts). They generate an interrupt if the corresponding enable control bit is set and the interrupt mask in the CC register is reset (RIM instruction). Table 114. Effect of low power modes on MTC Mode Description Wait No effect on MTC interface. MTC interrupts exit from Wait mode. Halt MTC registers are frozen. In Halt mode, the MTC interface is inactive. The MTC interface becomes operational again when the MCU is woken up by an interrupt with ‘exit from Halt mode’ capability. Table 115. MTC interrupt control/wake-up capability Interrupt event Event flag Enable control bit Exit from WAIT Exit from HALT Ratio increment RPI RIM Yes No Ratio decrement RMI Yes No Speed error SEI SEM Yes No Emergency stop EI EIM Yes No Current limitation CLI CLIM Yes No BEMF zero-crossing ZI ZIM Yes No End of demagnetization DI DIM Yes No Commutation or capture CI CIM Yes No PWM update PUI PUM Yes No Sampling out SOI SOM Yes No Obsolete Product(s) - Obsolete Product(s) |
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