AT91SAM7A3-AU Atmel, AT91SAM7A3-AU Datasheet - Page 12
![IC ARM7 MCU FLASH 256K 100LQFP](/photos/6/76/67646/313-100-lqfp_sml.jpg)
AT91SAM7A3-AU
Manufacturer Part Number
AT91SAM7A3-AU
Description
IC ARM7 MCU FLASH 256K 100LQFP
Manufacturer
Atmel
Series
AT91SAMr
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
Company:
Part Number:
AT91SAM7A3-AU
Manufacturer:
MXIC
Quantity:
1 001
Company:
Part Number:
AT91SAM7A3-AU
Manufacturer:
Atmel
Quantity:
730
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6. I/O Lines Considerations
6.1
6.2
6.3
6.4
6.5
6.6
12
JTAG Port Pins
Test Pin
Reset Pin
PIO Controller A and B Lines
Shutdown Logic Pins
I/O Line Drive Levels
AT91SAM7A3 Preliminary
TMS, TDI and TCK are schmitt trigger inputs. TMS and TCK are 5V-tolerant, TDI is not. TMS,
TDI and TCK do not integrate any resistors and have to be pulled-up externally.
TDO is an output, driven at up to VDD3V3.
The JTAGSEL pin is used to select the JTAG boundary scan when asserted at a high level.
The JTAGSEL pin integrates a permanent pull-down resistor so that it can be left unconnected
for normal operations.
The TST pin is used for manufacturing tests and integrates a pull-down resistor so that it can
be left unconnected for normal operations. Driving this line at a high level leads to unpredict-
able results.
The NRST pin is bidirectional. It is handled by the on-chip reset controller and can be driven
low to provide a reset signal to the external components or asserted low externally to reset the
microcontroller. There is no constraint on the length of the reset pulse, and the reset controller
can guarantee a minimum pulse length. This allows connection of a simple push-button on the
NRST pin as system user reset, and the use of the NRST signal to reset all the components of
the system.
All the I/O lines PA0 to PA31 and PB0 to PB29 are 5V-tolerant and all integrate a programma-
ble pull-up resistor. Programming of this pull-up resistor is performed independently for each
I/O line through the PIO Controllers.
5V-tolerant means that the I/O lines can drive voltage level according to VDD3V3, but can be
driven with a voltage at up to 5.5V. However, driving an I/O line with a voltage over VDD3V3
while the programmable pull-up resistor is enabled creates a current path through the pull-up
resistor from the I/O line to VDDIO. Care should be taken, especially at reset, as all the I/O
lines default as inputs with pull-up resistor enabled at reset.
The SHDW pin is an open drain output. It can be tied to VDDBU with an external pull-up
resistor.
The FWUP, WKUP0 and WKUP1 pins are input-only. They can accept voltages only between
0V and VDDBU. It is recommended to tie these pins either to GND or to VDDBU with an exter-
nal resistor.
All the I/O lines can draw up to 2 mA.
6042E–ATARM–14-Dec-06
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