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1745D–ATARM–04-Nov-05
AT91M55800A
• 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
0 0 None TC_ETRGEDG_EDGE_NONE
0 1 Rising edge TC_ETRGEDG_RISING_EDGE
1 0 Falling edge TC_ETRGEDG_FALLING_EDGE
1 1 Each edge TC_ETRGEDG_BOTH_EDGE
ABETRG Selected ABETRG Code Label: TC_ABETRG
0 TIOB is used as an external trigger. TC_ABETRG_TIOB
1 TIOA is used as an external trigger. TC_ABETRG_TIOA
LDRA Edge
Code Label: TC_LDRA
0 0 None TC_LDRA_EDGE_NONE
0 1 Rising edge of TIOA TC_LDRA_RISING_EDGE
1 0 Falling edge of TIOA TC_LDRA_FALLING_EDGE
1 1 Each edge of TIOA TC_LDRA_BOTH_EDGE
LDRB Edge Code Label: TC_LDRB
0 0 None TC_LDRB_EDGE_NONE
0 1 Rising edge of TIOA TC_LDRB_RISING_EDGE
1 0 Falling edge of TIOA TC_LDRB_FALLING_EDGE
1 1 Each edge of TIOA TC_LDRB_BOTH_EDGE