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ST92F124 bảng dữ liệu(PDF) 188 Page - STMicroelectronics |
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ST92F124 bảng dữ liệu(HTML) 188 Page - STMicroelectronics |
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188 / 429 page  188/429 MULTIFUNCTION TIMER (MFT) 10.4 MULTIFUNCTION TIMER (MFT) 10.4.1 Introduction The Multifunction Timer (MFT) peripheral offers powerful timing capabilities and features 12 oper- ating modes, including automatic PWM generation and frequency measurement. The MFT comprises a 16-bit Up/Down counter driven by an 8-bit programmable prescaler. The in- put clock may be INTCLK/3 or an external source. The timer features two 16-bit Comparison Regis- ters, and two 16-bit Capture/Load/Reload Regis- ters. Two input pins and two alternate function out- put pins are available. Several functional configurations are possible, for instance: – 2 input captures on separate external lines, and 2 independent output compare functions with the counter in free-running mode, or 1 output com- pare at a fixed repetition rate. – 1 input capture, 1 counter reload and 2 inde- pendent output compares. – 2 alternate autoreloads and 2 independent out- put compares. – 2 alternate captures on the same external line and 2 independent output compares at a fixed repetition rate. When two MFTs are present in an ST9 device, a combined operating mode is available. An internal On-Chip Event signal can be used on some devices to control other on-chip peripherals. The two external inputs may be individually pro- grammed to detect any of the following: – rising edges – falling edges – both rising and falling edges Figure 101. MFT Simplified Block Diagram 9 |
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