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ST7LITEUS2 数据表(PDF) 74 Page - STMicroelectronics |
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ST7LITEUS2 数据表(HTML) 74 Page - STMicroelectronics |
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74 / 136 page  Obsolete Product(s) - Obsolete Product(s) Obsolete Product(s) - Obsolete Product(s) On-chip peripherals ST7LITEUS2, ST7LITEUS5 74/136 10.2.5 Interrupts 10.2.6 Register description Timer control status register (ATCSR) Reset value: 0000 0000 (00h) Table 28. Interrupt events Interrupt event (1) 1. The interrupt events are connected to separate interrupt vectors (see Interrupts chapter). They generate an interrupt if the enable bit is set in the ATCSR register and the interrupt mask in the CC register is reset (RIM instruction). Event flag Enable control bit Exit from Wait Exit from Halt Exit from Active-halt Overflow event OVF OVFIE Yes No Yes(2) 2. Only if CK0=1 and CK1=0 CMP event CMPFx CMPIE Yes No No 7 0 0 0 0 CK1 CK0 OVF OVFIE CMPIE Read/write Bits 7:5 Reserved, must be kept cleared. Bits 4:3 CK[1:0] Counter Clock Selection. These bits are set and cleared by software and cleared by hardware after a reset. They select the clock frequency of the counter (see Table 29: Counter clock selection). Bit 2 OVF Overflow flag. This bit is set by hardware and cleared by software by reading the ATCSR register. It indicates the transition of the counter from FFFh to ATR value. 0: No counter overflow occurred 1: Counter overflow occurred When set, the OVF bit stays high for 1 fCOUNTER cycle (up to 1ms depending on the clock selection) after it has been cleared by software. Bit 1 OVFIE Overflow interrupt enable. This bit is read/write by software and cleared by hardware after a reset. 0: OVF interrupt disabled 1: OVF interrupt enabled Bit 0 CMPIE Compare interrupt enable. This bit is read/write by software and clear by hardware after a reset. It allows to mask the interrupt generation when CMPF bit is set. 0: CMPF interrupt disabled 1: CMPF interrupt enabled Obsolete Product(s) - Obsolete Product(s) |
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