at91sam9263 ATMEL Corporation, at91sam9263 Datasheet - Page 629
at91sam9263
Manufacturer Part Number
at91sam9263
Description
At91 Arm Thumb Microcontrollers
Manufacturer
ATMEL Corporation
Datasheet
1.AT91SAM9263.pdf
(1065 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
at91sam9263-CJ
Manufacturer:
ATMEL
Quantity:
181
Company:
Part Number:
at91sam9263-EK
Manufacturer:
Atmel
Quantity:
135
Company:
Part Number:
at91sam9263B-CU
Manufacturer:
IDT
Quantity:
1 043
Part Number:
at91sam9263B-CU
Manufacturer:
ATMEL/爱特梅尔
Quantity:
20 000
Company:
Part Number:
at91sam9263B-CU-100
Manufacturer:
ATMEL
Quantity:
1 000
- Current page: 629 of 1065
- Download datasheet (16Mb)
36.5.7
36.5.8
36.5.9
6249D–ATARM–20-Dec-07
Capture Operating Mode
Capture Registers A and B
Trigger Conditions
The channel can also be configured to have an external trigger. In Capture Mode, the external
trigger signal can be selected between TIOA and TIOB. In Waveform Mode, an external event
can be programmed on one of the following signals: TIOB, XC0, XC1 or XC2. This external
event can then be programmed to perform a trigger by setting ENETRG in TC_CMR.
If an external trigger is used, the duration of the pulses must be longer than the master clock
period in order to be detected.
Regardless of the trigger used, it will be taken into account at the following active edge of the
selected clock. This means that the counter value can be read differently from zero just after a
trigger, especially when a low frequency signal is selected as the clock.
This mode is entered by clearing the WAVE parameter in TC_CMR (Channel Mode Register).
Capture Mode allows the TC channel to perform measurements such as pulse timing, fre-
quency, period, duty cycle and phase on TIOA and TIOB signals which are considered as
inputs.
Figure 36-5
Registers A and B (RA and RB) are used as capture registers. This means that they can be
loaded with the counter value when a programmable event occurs on the signal TIOA.
The LDRA parameter in TC_CMR defines the TIOA edge for the loading of register A, and the
LDRB parameter defines the TIOA edge for the loading of Register B.
RA is loaded only if it has not been loaded since the last trigger or if RB has been loaded since
the last loading of RA.
RB is loaded only if RA has been loaded since the last trigger or the last loading of RB.
Loading RA or RB before the read of the last value loaded sets the Overrun Error Flag (LOVRS)
in TC_SR (Status Register). In this case, the old value is overwritten.
In addition to the SYNC signal, the software trigger and the RC compare trigger, an external trig-
ger can be defined.
The ABETRG bit in TC_CMR selects TIOA or TIOB input signal as an external trigger. The
ETRGEDG parameter defines the edge (rising, falling or both) detected to generate an external
trigger. If ETRGEDG = 0 (none), the external trigger is disabled.
• Software Trigger: Each channel has a software trigger, available by setting SWTRG in
• SYNC: Each channel has a synchronization signal SYNC. When asserted, this signal has the
• Compare RC Trigger: RC is implemented in each channel and can provide a trigger when the
TC_CCR.
same effect as a software trigger. The SYNC signals of all channels are asserted
simultaneously by writing TC_BCR (Block Control) with SYNC set.
counter value matches the RC value if CPCTRG is set in TC_CMR.
shows the configuration of the TC channel when programmed in Capture Mode.
AT91SAM9263 Preliminary
629
Related parts for at91sam9263
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
AT91SAM ARM-based Flash MCU
Manufacturer:
ATMEL [ATMEL Corporation]
Datasheet:
Part Number:
Description:
At91sam Arm-based Flash Mcu
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
At91sam Arm-based Flash Mcu
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
At91sam Arm-based Embedded Mpu
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
At91sam Arm-based Embedded Mpu
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
At91sam Arm-based Embedded Mpu
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
At91sam Arm-based Embedded Mpu
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
At91sam Arm-based Embedded Mpu
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
AT91 ARM Thumb-based Microcontrollers
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
AT91 ARM THUMB-BASED MICROCONTROLLERS
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
AT91 ARM Thumb-based Microcontrollers
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
AT91 MEMORY EXTENSION CARD
Manufacturer:
Atmel
Datasheet:
Part Number:
Description:
AT91 ARM X40 SERIES EVAL KIT
Manufacturer:
Atmel
Datasheet:
Part Number:
Description:
AT91 ARM Cortex M3-based Processor
Manufacturer:
ATMEL [ATMEL Corporation]
Datasheet:
Part Number:
Description:
AT91 ARM Thumb-based Microcontrollers
Manufacturer:
ATMEL [ATMEL Corporation]
Datasheet: