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ST72324BJ Fiches technique(PDF) 66 Page - STMicroelectronics |
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ST72324BJ Fiches technique(HTML) 66 Page - STMicroelectronics |
66 / 188 page On-chip peripherals ST72324B 66/188 10.2.5 Low power modes 10.2.6 Interrupts The MCC/RTC interrupt event generates an interrupt if the OIE bit of the MCCSR register is set and the interrupt mask in the CC register is not active (RIM instruction). 10.2.7 MCC registers MCC control/status register (MCCSR) ) Table 36. Effect of low power modes on MCC/RTC Mode Description Wait No effect on MCC/RTC peripheral. MCC/RTC interrupt causes the device to exit from Wait mode. Active Halt No effect on MCC/RTC counter (OIE bit is set), the registers are frozen. MCC/RTC interrupt causes the device to exit from Active Halt mode. Halt MCC/RTC counter and registers are frozen. MCC/RTC operation resumes when the MCU is woken up by an interrupt with Exit from Halt capability. Table 37. MCC/RTC interrupt control/wake-up capability Interrupt event Event flag Enable control bit Exit from WAIT Exit from HALT Time base overflow event OIF OIE Yes No(1) 1. The MCC/RTC interrupt wakes up the MCU from Active Halt mode, not from Halt mode. MCCSR Reset value: 0000 0000 (00h) 76543 210 MCO CP[1:0] SMS TB[1:0] OIE OIF R/W R/W R/W R/W R/W R/W Table 38. MCCSR register description Bit Name Function 7MCO Main Clock Out selection This bit enables the MCO alternate function on the PF0 I/O port. It is set and cleared by software. 0: MCO alternate function disabled (I/O pin free for general-purpose I/O). 1: MCO alternate function enabled (fCPU on I/O port). Note: To reduce power consumption, the MCO function is not active in Active Halt mode. |
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