Rainbow Electronics ATtiny28L - Manual (Page 25)

25
ATtiny28L/V
1062E–10/01
The Stop condition provides a Timer Enable/Disable function. The CK down divided
modes are scaled directly from the CK oscillator clock. If the external pin modes are
used for Timer/Counter0, transitions on PB2/(T0) will clock the counter even if the pin is
configured as an output. This feature can give the user software control of the counting.
Timer Counter 0 – TCNT0
The Timer/Counter0 is realized as an up-counter with read and write access. If the
Timer/Counter0 is written and a clock source is present, the Timer/Counter0 continues
counting in the timer clock cycle following the write operation.
Table 10. Clock 0 Prescale Select
CS02 CS01 CS00 Description
0 0 0 Stop, the Timer/Counter0 is stopped.
0 0 1 CK
0 1 0 Modulator Period
0 1 1 CK/64
1 0 0 CK/256
1 0 1 CK/1024
1 1 0 External Pin T0, falling edge
1 1 1 External Pin T0, rising edge
Bit 7 6 5 4 3 2 1 0
$03 MSB LSB TCNT0
Read/Write R/W R/W R/W R/W R/W R/W R/W R/W
Initial Value 0 0 0 0 0 0 0 0