SAM3A8C Atmel Corporation, SAM3A8C Datasheet - Page 166
![no-image](/images/manufacturer_photos/0/0/79/atmel_corporation_sml.jpg)
SAM3A8C
Manufacturer Part Number
SAM3A8C
Description
Manufacturer
Atmel Corporation
- Current page: 166 of 1465
- Download datasheet (26Mb)
11.21.2
• DISFOLD
When set to 1, disables IT folding. see
• DISDEFWBUF
When set to 1, disables write buffer use during default memory map accesses. This causes all bus faults to be precise bus
faults but decreases performance because any store to memory must complete before the processor can execute the next
instruction.
This bit only affects write buffers implemented in the Cortex-M3 processor.
• DISMCYCINT
When set to 1, disables interruption of load multiple and store multiple instructions. This increases the interrupt latency of
the processor because any LDM or STM must complete before the processor can stack the current state and enter the
interrupt handler.
11.21.2.1
166
166
31
23
15
7
SAM3X/A
SAM3X/A
Auxiliary Control Register
About IT folding
30
22
14
6
The ACTLR provides disable bits for the following processor functions:
See the register summary in
ments are:
In some situations, the processor can start executing the first instruction in an IT block while it is
still executing the IT instruction. This behavior is called IT folding, and improves performance,
However, IT folding can cause jitter in looping. If a task must avoid jitter, set the DISFOLD bit to
1 before executing the task, to disable IT folding.
• IT folding
• write buffer use for accesses to the default memory map
• interruption of multi-cycle instructions.
Reserved
29
21
13
5
“About IT folding” on page 166
28
20
12
4
Table 11-30 on page 165
Reserved
Reserved
Reserved
27
19
11
3
for more information.
DISFOLD
for the ACTLR attributes. The bit assign-
26
18
10
2
DISDEFWBUF
25
17
9
1
11057A–ATARM–17-Feb-12
11057A–ATARM–17-Feb-12
DISMCYCINT
24
16
8
0
Related parts for SAM3A8C
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
![SAM3A](/images/no-image3.png)
Part Number:
Description:
AT91SAM ARM-based Flash MCU
Manufacturer:
ATMEL [ATMEL Corporation]
Datasheet:
![U641B](/images/manufacturer_photos/0/0/79/atmel_corporation_tmb.jpg)
Part Number:
Description:
INTERVAL AND WIPE/WASH WIPER CONTROL IC WITH DELAY
Manufacturer:
ATMEL Corporation
Datasheet:
![U4082B](/images/manufacturer_photos/0/0/79/atmel_corporation_tmb.jpg)
Part Number:
Description:
Low-Voltage Voice-Switched IC for Hands-Free Operation
Manufacturer:
ATMEL Corporation
Datasheet:
![U4089B](/images/manufacturer_photos/0/0/79/atmel_corporation_tmb.jpg)
Part Number:
Description:
MONOLITHIC INTEGRATED FEATUREPHONE CIRCUIT
Manufacturer:
ATMEL Corporation
Datasheet:
![U4255BM-M](/images/manufacturer_photos/0/0/79/atmel_corporation_tmb.jpg)
Part Number:
Description:
AM-FM Receiver IC U4255BM-M
Manufacturer:
ATMEL Corporation
Datasheet:
![U4089B-P](/images/manufacturer_photos/0/0/79/atmel_corporation_tmb.jpg)
Part Number:
Description:
Monolithic Integrated Feature Phone Circuit
Manufacturer:
ATMEL Corporation
Datasheet:
![TDA4470](/images/manufacturer_photos/0/0/79/atmel_corporation_tmb.jpg)
Part Number:
Description:
Multistandard Video-IF and Quasi Parallel Sound Processing
Manufacturer:
ATMEL Corporation
Datasheet:
![ATF22V10B-25PC](/images/manufacturer_photos/0/0/79/atmel_corporation_tmb.jpg)
Part Number:
Description:
High-performance EE PLD
Manufacturer:
ATMEL Corporation
Datasheet:
![AT89C51ED2-IM](/images/manufacturer_photos/0/0/79/atmel_corporation_tmb.jpg)
Part Number:
Description:
8-bit Flash Microcontroller
Manufacturer:
ATMEL Corporation
Datasheet:
![AT24C01](/images/manufacturer_photos/0/0/79/atmel_corporation_tmb.jpg)
Part Number:
Description:
2-Wire Serial EEPROM
Manufacturer:
ATMEL Corporation
Datasheet: