PCF8563
CLKOUT frequency register
Table 20 CLKOUT frequency register bits description(address 0DH)
Table 21 CLKOUT frequency selection
Countdown timer registers
The Timer register is an 8-bit binary countdown timer. It is enabled and disabled via the
Timer control register bit TE. The source clock for the timer is also selected by the Timer
control register. Other timer properties, e.g. interrupt generation, are controlled via the
Control/status 2 register. For accurate read back of the countdown value, the I 2 C-bus clock
SCL must be operating at a frequency of at least twice the selected timer clock.
Table 22 Timer control register bits description (address 0EH)
Table 23 Timer source clock frequency selection
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