AT91 datasheet(129/153 Pages) ATMEL

129 / 153 page

129

AT91X40 Series

1354D–ATARM–08/02

Output Controller

The output controller defines the output level changes on TIOA and TIOB following an

event. TIOB control is used only if TIOB is defined as output (not as an external event).

The following events control TIOA and TIOB: software trigger, external event and RC

compare. RA compare controls TIOA and RB compare controls TIOB. Each of these

events can be programmed to set, clear or toggle the output as defined in the corre-

sponding parameter in TC_CMR.

The tables below show which parameter in TC_CMR is used to define the effect of each

event.

If two or more events occur at the same time, the priority level is defined as follows:

Software Trigger

External Event

RC Compare

RA or RB Compare

Status

The following bits in the status register are significant in Waveform Mode:

•

CPAS: RA Compare Status

There has been a RA Compare match at least once since the last read of the status

•

CPBS: RB Compare Status

There has been a RB Compare match at least once since the last read of the status

•

CPCS: RC Compare Status

There has been a RC Compare match at least once since the last read of the status

•

COVFS: Counter Overflow

Counter has attempted to count past $FFFF since the last read of the status

•

ETRGS: External Trigger

External trigger has been detected since the last read of the status

Note:

All the status bits are set when the corresponding event occurs and they are automati-

cally cleared when the Status Register is read.

Parameter

TIOA Event

ASWTRG

Software Trigger

AEEVT

External Event

ACPC

RC Compare

ACPA

RA Compare

Parameter

TIOB Event

BSWTRG

Software Trigger

BEEVT

External Event

BCPC

RC Compare

BCPB

RB Compare

AT91 Datasheet(PDF) 129 Page - ATMEL Corporation

AT91 Datasheet(HTML) 129 Page - ATMEL Corporation

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL