AT91SAM7A3-AU Atmel, AT91SAM7A3-AU Datasheet - Page 93

IC ARM7 MCU FLASH 256K 100LQFP

AT91SAM7A3-AU

Manufacturer Part Number
AT91SAM7A3-AU
Description
IC ARM7 MCU FLASH 256K 100LQFP
Manufacturer
Atmel
Series
AT91SAMr
Datasheets

Specifications of AT91SAM7A3-AU

Core Processor
ARM7
Core Size
16/32-Bit
Speed
60MHz
Connectivity
CAN, I²C, MMC, SPI, SSC, UART/USART
Peripherals
POR, PWM, WDT
Number Of I /o
62
Program Memory Size
256KB (256K x 8)
Program Memory Type
FLASH
Ram Size
32K x 8
Voltage - Supply (vcc/vdd)
1.65 V ~ 1.95 V
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
100-LQFP
Controller Family/series
AT91SAM7xx
No. Of I/o's
62
Ram Memory Size
32KB
Cpu Speed
60MHz
No. Of Timers
3
Rohs Compliant
Yes
Package
100LQFP
Device Core
ARM7TDMI
Family Name
91S
Maximum Speed
60 MHz
Operating Supply Voltage
3.3 V
Data Bus Width
32 Bit
Number Of Programmable I/os
62
Interface Type
CAN/SPI/I2S/TWI/USART/USB
On-chip Adc
2(8-chx10-bit)
Number Of Timers
3
Processor Series
AT91SAMx
Core
ARM7TDMI
Data Ram Size
32 KB
Maximum Clock Frequency
60 MHz
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
3rd Party Development Tools
JTRACE-ARM-2M, MDK-ARM, RL-ARM, ULINK2
Development Tools By Supplier
AT91SAM-ICE, AT91-ISP, AT91SAM7A3-EK
Minimum Operating Temperature
- 40 C
Cpu Family
91S
Device Core Size
32b
Frequency (max)
60MHz
Total Internal Ram Size
32KB
# I/os (max)
62
Number Of Timers - General Purpose
3
Operating Supply Voltage (typ)
3.3V
Operating Supply Voltage (max)
3.6V
Operating Supply Voltage (min)
3V
Instruction Set Architecture
RISC
Operating Temp Range
-40C to 85C
Operating Temperature Classification
Industrial
Mounting
Surface Mount
Pin Count
100
Package Type
LQFP
For Use With
AT91SAM-ICE - EMULATOR FOR AT91 ARM7/ARM9AT91SAM7A3-EK - KIT EVAL FOR AT91SAM7A3
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Lead Free Status / Rohs Status
 Details

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
AT91SAM7A3-AU
Manufacturer:
MXIC
Quantity:
1 001
Part Number:
AT91SAM7A3-AU
Manufacturer:
Atmel
Quantity:
730
Part Number:
AT91SAM7A3-AU
Manufacturer:
Atmel
Quantity:
10 000
19.3.6
19.3.7
6042E–ATARM–14-Dec-06
Embedded Flash Controller
Misalignment Detector
The peripheral address space and each internal memory area can be protected against write
and non-privileged access of one of the masters. When one of the masters performs a forbid-
den access, an Abort is generated and the Abort Status traces what has happened.
There is no priority in the protection of the memory spaces. In case of overlap between several
memory spaces, the strongest protection is taken into account. If an access is performed to an
address which is not contained in any of the 16 memory spaces, the Memory Protection Unit
generates an abort. To prevent this, the user can define a memory space of 4M bytes starting
at 0 and authorizing any access.
The Embedded Flash Controller is added to the Memory Controller and ensures the interface
of the flash block with the 32-bit internal bus. It allows an increase of performance in Thumb
Mode for Code Fetch with its system of 32-bit buffers. It also manages with the programming,
erasing, locking and unlocking sequences thanks to a full set of commands.
The Memory Controller features a Misalignment Detector that checks the consistency of the
accesses.
For each access, regardless of the master, the size of the access and the bits 0 and 1 of the
address bus are checked. If the type of access is a word (32-bit) and the bits 0 and 1 are not 0,
or if the type of the access is a half-word (16-bit) and the bit 0 is not 0, an abort is returned to
the master and the access is cancelled. Note that the accesses of the ARM processor when it
is fetching instructions are not checked.
The misalignments are generally due to software bugs leading to wrong pointer handling.
These bugs are particularly difficult to detect in the debug phase.
As the requested address is saved in the Abort Status Register and the address of the instruc-
tion generating the misalignment is saved in the Abort Link Register of the processor,
detection and fix of this kind of software bugs is simplified.
AT91SAM7A3 Preliminary
93

Related parts for AT91SAM7A3-AU