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C8051F38x USB MCU Slide 22
The SMBCS1–0 bits in SMB0CF select the SMBus clock source. Overflows from Timer 0, Timer 1 or Timer 2 set the time-base. This is used only when operating as a master or when the Bus Free Timeout detection is enabled. The selected clock source may be shared by other peripherals provided the timer is left running at all times.
PTM Published on: 2011-06-01