ATAM862 datasheet(91/110 Pages) ATMEL

91 / 110 page

4554E–4BMCU–05/06

ATAM862-3

24.3

Combination Mode Timer 2 and Timer 3

Figure 24-12. Combination Timer 3 and Timer 2

24.3.1

Combination Mode 10: Frequency Measurement or Event Counter with Time Gate

Timer 2 mode 1/2:

12-bit compare counter/8-bit compare counter and

4-bit prescaler

Timer 2 output mode 1/6:

Timer 2 compare match toggles (TOG2) to the Timer 3

Timer 3 mode 3:

Timer/Counter; internal trigger restart and internal capture

(with Timer 2 TOG2-signal)

The counter is driven by an external (T3I) clock source. The output signal (TOG2) of Timer 2

resets the counter. The counter value before reset is saved in the capture register. If sin-

gle-action mode is activated for one or both compare registers, the trigger signal restarts also

the single actions. This mode can be used for frequency measurements or as event counter with

time gate.

8-bit counter 3

RES

Compare 3/1

T3CO1

T3CP

T3CO2

Timer 3 - control

T3O

CL3

T3I

T3EX

SYSCL

T1OUT

POUT

I/O-bus

Compare 3/2

T3CM1

T3CM2

T3C

T3ST

Modulator 3

Demodu-

lator 3

Control

TOG3

INT5

RES

CM31

T3I

T3EX

TOG2

SCI

SSI

CP3

4-bit counter 2/1

RES

OVF1

Compare 2/1

T2CO1

CM1

POUT

SSI

CL2/2

DCG

T2M1

P4CR

8-bit counter 2/2

RES

OVF2

Compare 2/2

T2CO2

T2CM

TOG2

INT4

Biphase-,

Manchester-

modulator

OUTPUT

MOUT

T2O

Timer 2

modulator 2

output-stage

T2M2

Control

(RE, FE, SCO, OMSK)

SSI

T2C

CL2/1

TOG3

SYSCL

T1OUT

SCL

Timer 2 - control

T3CS

T3M

POUT

DCGO

T2I

I/O-bus

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