AT91 datasheet(136/153 Pages) ATMEL

136 / 153 page

136

AT91X40 Series

1354D–ATARM–08/02

• LDBDIS: Counter Clock Disable with RB Loading (Code Label TC_LDBDIS)

0 = Counter clock is not disabled when RB loading occurs.

1 = Counter clock is disabled when RB loading occurs.

• ETRGEDG: External Trigger Edge Selection

•

ABETRG: TIOA or TIOB External Trigger Selection

• CPCTRG: RC Compare Trigger Enable (Code Label TC_CPCTRG)

0 = RC Compare has no effect on the counter and its clock.

1 = RC Compare resets the counter and starts the counter clock.

• WAVE = 0 (Code Label TC_WAVE)

0 = Capture Mode is enabled.

1 = Capture Mode is disabled (Waveform Mode is enabled).

•

LDRA: RA Loading Selection

•

LDRB: RB Loading Selection

ETRGEDG

Edge

Code Label

TC_ETRGEDG

None

TC_ETRGEDG_EDGE_NONE

Rising Edge

TC_ETRGEDG_RISING_EDGE

Falling Edge

TC_ETRGEDG_FALLING_EDGE

Each Edge

TC_ETRGEDG_BOTH_EDGE

ABETRG

Selected ABETRG

Code Label

TC_ABETRG

TIOB is used as an external trigger.

TC_ABETRG_TIOB

TIOA is used as an external trigger.

TC_ABETRG_TIOA

LDRA

Edge

Code Label

TC_LDRA

None

TC_LDRA_EDGE_NONE

Rising edge of TIOA

TC_LDRA_RISING_EDGE

Falling edge of TIOA

TC_LDRA_FALLING_EDGE

Each edge of TIOA

TC_LDRA_BOTH_EDGE

LDRB

Edge

Code Label

TC_LDRB

None

TC_LDRB_EDGE_NONE

Rising edge of TIOA

TC_LDRB_RISING_EDGE

Falling edge of TIOA

TC_LDRB_FALLING_EDGE

Each edge of TIOA

TC_LDRB_BOTH_EDGE

AT91 Datasheet(PDF) 136 Page - ATMEL Corporation

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