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C8051F040-GQR Datasheet(PDF) 30 Page - Silicon Laboratories |
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C8051F040-GQR Datasheet(HTML) 30 Page - Silicon Laboratories |
30 / 328 page ![]() C8051F040/1/2/3/4/5/6/7 30 Rev. 1.5 1.5. Programmable Counter Array The C8051F04x MCU family includes an on-board Programmable Counter/Timer Array (PCA) in addition to the five 16-bit general purpose counter/timers. The PCA consists of a dedicated 16-bit counter/timer time base with six programmable capture/compare modules. The timebase is clocked from one of six sources: the system clock divided by 12, the system clock divided by 4, Timer 0 overflow, an External Clock Input (ECI pin), the system clock, or the external oscillator source divided by 8. Each capture/compare module can be configured to operate in one of six modes: Edge-Triggered Capture, Software Timer, High Speed Output, Frequency Output, 8-Bit Pulse Width Modulator, or 16-Bit Pulse Width Modulator. The PCA Capture/Compare Module I/O and External Clock Input are routed to the MCU Port I/ O via the Digital Crossbar. Figure 1.10. PCA Block Diagram Capture/Compare Module 1 Capture/Compare Module 0 Capture/Compare Module 2 Capture/Compare Module 3 Crossbar Port I/O 16-Bit Counter/Timer PCA CLOCK MUX SYSCLK/12 SYSCLK/4 Timer 0 Overflow ECI SYSCLK External Clock/8 Capture/Compare Module 4 Capture/Compare Module 5 |
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