Atmega162/v – Rainbow Electronics ATmega162V User Manual
Page 131
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ATmega162/V
2513E–AVR–09/03
• 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
0
0
0
No clock source. (Timer/Counter stopped).
0
0
1
clk
I/O
/1 (No prescaling)
0
1
0
clk
I/O
/8 (From prescaler)
0
1
1
clk
I/O
/64 (From prescaler)
1
0
0
clk
I/O
/256 (From prescaler)
1
0
1
clk
I/O
/1024 (From prescaler)
1
1
0
External clock source on T1 pin. Clock on falling edge.
1
1
1
External clock source on T1 pin. Clock on rising edge.
Table 58. Clock Select Bit Description Timer/Counter3
CS32
CS31
CS30
Description
0
0
0
No clock source. (Timer/Counter stopped).
0
0
1
clk
I/O
/ 1 (No prescaling)
0
1
0
clk
I/O
/ 8 (From prescaler).
0
1
1
clk
I/O
/ 64 (From prescaler).
1
0
0
clk
I/O
/ 256 (From prescaler).
1
0
1
clk
I/O
/ 1024 (From prescaler).
1
1
0
clk
I/O
/ 16 (From prescaler).
1
1
1
clk
I/O
/ 32 (From prescaler).