ATmega162 datasheet(132/324 Pages) ATMEL

132 / 324 page

132

2513K–AVR–07/09

ATmega162/V

• Bit 2:0 – CSn2:0: Clock Select

The three Clock Select bits select the clock source to be used by the Timer/Counter, see Figure

55 and Figure 56.

If external pin modes are used for the Timer/Counter1, transitions on the T1 pin will clock the

counter even if the pin is configured as an output. This feature allows software control of the

counting..

Table 57. Clock Select Bit Description Timer/Counter1

CS12

CS11

CS10

Description

No clock source. (Timer/Counter stopped).

001

clk

I/O/1 (No prescaling)

010

clkI/O/8 (From prescaler)

011

clkI/O/64 (From prescaler)

100

clk

I/O/256 (From prescaler)

101

clkI/O/1024 (From prescaler)

External clock source on T1 pin. Clock on falling edge.

External clock source on T1 pin. Clock on rising edge.

Table 58. Clock Select Bit Description Timer/Counter3

CS32

CS31

CS30

Description

No clock source. (Timer/Counter stopped).

001

clk

I/O / 1 (No prescaling)

010

clkI/O / 8 (From prescaler).

011

clk

I/O / 64 (From prescaler).

100

clk

I/O / 256 (From prescaler).

101

clkI/O / 1024 (From prescaler).

110

clk

I/O / 16 (From prescaler).

111

clk

I/O / 32 (From prescaler).

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