AT91SAM7A3-AU Atmel, AT91SAM7A3-AU Datasheet - Page 414

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
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AT91SAM7A3-AU
Manufacturer:
MXIC
Quantity:
1 001
Part Number:
AT91SAM7A3-AU
Manufacturer:
Atmel
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Manufacturer:
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33.4
33.4.1
33.4.2
414
Typical Connection
AT91SAM7A3 Preliminary
USB Device Transceiver
VBUS Monitoring
Figure 33-2. Board Schematic to Interface USB Device Peripheral
The USB device transceiver is embedded in the product. A few discrete components are
required as follows:
Pullup enable/disable is done through a MOSFET controlled by a PIO. The pullup is enabled
when the PIO drives a 0. Thus PIO default state to 1 corresponds to a pullup disable. Once the
pullup is enabled, the host will force a device reset 100 ms later. Bus powered devices must
connect the pullup within 100 ms.
VBUS monitoring is required to detect host connection. VBUS monitoring is done using a stan-
dard PIO with internal pullup disabled. When the host is switched off, it should be considered as
a disconnect, the pullup must be disabled in order to prevent powering the host through the pull-
up resistor.
When the host is disconnected and the transceiver is enabled, then DDP and DDM are floating.
This may lead to over consumption. A solution is to connect 330 KΩ pulldowns on DP and DM.
These pulldowns do not alter DDP and DDM signal integrity.
PIO
PIO
DDM
DDP
• the application detects all device states as defined in chapter 9 of the USB specification;
• to reduce power consumption the host is disconnected
• for line termination.
– pullup enable/disable
– VBUS monitoring
5V Bus Monitoring
Pullup Control
0: Enable
1: Disable
47 K
27 K
R
R
EXT
EXT
330 K
330 K
3V3
1.5K
2
3
Connector
6042E–ATARM–14-Dec-06
Type B
1
4

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