AT91SAM7A3-AU Atmel, AT91SAM7A3-AU Datasheet - Page 298

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

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29.5.7
29.5.7.1
29.5.7.2
29.5.7.3
6042E–ATARM–14-Dec-06
Test Modes
Normal Mode
Automatic Echo Mode
Local Loopback Mode
The USART can be programmed to operate in three different test modes. The internal loop-
back capability allows on-board diagnostics. In the loopback mode the USART interface pins
are disconnected or not and reconfigured for loopback internally or externally.
Normal mode connects the RXD pin on the receiver input and the transmitter output on the
TXD pin.
Figure 29-27. Normal Mode Configuration
Automatic echo mode allows bit-by-bit retransmission. When a bit is received on the RXD pin,
it is sent to the TXD pin, as shown in
on the TXD pin. The RXD pin is still connected to the receiver input, thus the receiver remains
active.
Figure 29-28. Automatic Echo Mode Configuration
Local loopback mode connects the output of the transmitter directly to the input of the receiver,
as shown in
the receiver and the TXD pin is continuously driven high, as in idle state.
Figure 29-29. Local Loopback Mode Configuration
Figure
29-29. The TXD and RXD pins are not used. The RXD pin has no effect on
Transmitter
Transmitter
Transmitter
Receiver
Receiver
Receiver
Figure
AT91SAM7A3 Preliminary
29-28. Programming the transmitter has no effect
1
RXD
TXD
RXD
TXD
RXD
TXD
298

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