Rainbow-electronics ATtiny28L Manual do Utilizador descarregar pdf (Página 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.

001CK

0 1 0 Modulator Period

011CK/64

100CK/256

1 0 1 CK/1024

1 1 0 External Pin T0, falling edge

1 1 1 External Pin T0, rising edge

Bit 76543210

$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

1 2 ... 20 21 22 23 24 25 26 27 28 29 30 ... 74 75

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