ATAR092-C_14 datasheet(44/108 Pages) ATMEL

Part #	ATAR092-C

Description	Up to 7 External/Internal Interrupt Sources

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Manufacturer	ATMEL [ATMEL Corporation]

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44

4593D–4BMCU–05/06

ATAR092-C/ATAR892-C

5.3.2.7

Duty Cycle Generator

The duty cycle generator generates duty cycles of 25%, 33% or 50%. The frequency at the duty

cycle generator output depends on the duty cycle and the Timer 2 prescaler setting. The

DCG-stage can also be used as additional programmable prescaler for Timer 2.

Figure 5-23. DCG Output Signals

Table 5-9.

Timer 2 Duty Cycle Bits

T2D1

T2D0

Function of Duty Cycle Generator (DCG)

Additional Divider Effect

1

Bypassed (DCGO0)

/1

1

0

Duty cycle 1/1 (DCGO1)

/2

0

1

Duty cycle 1/2 (DCGO2)

/3

0

Duty cycle 1/3 (DCG03)

/4

T2MS1

Timer 2 Mode Select bit 1

T2MS0

Timer 2 Mode Select bit 0

Table 5-10.

Timer 2 Mode Select Bits

Mode

T2MS1

T2MS0

Clock Output (POUT)

Timer 2 Modes

1

4-bit counter overflow (OVF1)

12-bit compare counter, the DCG

have to be bypassed in this mode

2

1

0

4-bit compare output (CM1)

8-bit compare counter with 4-bit

programmable prescaler and duty

cycle generator

3

0

1

4-bit compare output (CM1)

8-bit compare counter clocked by

SYSCL or the external clock input

T2I, 4-bit prescaler run, the

counter 2/1 starts after writing

mode 3

4

0

4-bit compare output (CM1)

8-bit compare counter clocked by

SYSCL or the external clock input

T2I, 4-bit prescaler stop and

resets

DCGIN

DCGO0

DCGO1

DCGO2

DCGO3

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ATAR092-C Datasheet(PDF) 44 Page - ATMEL Corporation

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