AT91M43300-25CI Atmel, AT91M43300-25CI Datasheet - Page 8

• Manufacturer Part Number: AT91M43300-25CI
• Description: IC ARM7 MCU 144 BGA
• Manufacturer: Atmel
• Series: AT91SAMr

Specifications of AT91M43300-25CI

• Core Processor: ARM7
• Core Size: 16/32-Bit
• Speed: 25MHz
• Connectivity: EBI/EMI, SPI, UART/USART
• Peripherals: WDT
• Number Of I /o: 58
• Program Memory Type: ROMless
• Ram Size: 3K x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 3.6 V
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 144-LFBGA
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Program Memory Size: -
• Data Converters: -

5.2
6. EBI: External Bus Interface
7. AIC: Advanced Interrupt Controller
8
Power Supplies
AT91M43300
ated by the corresponding peripheral. See the USART section and the SPI section for more
details on PDC operation and programming.
The AT91M43300 has two kinds of power supply pins:
•
•
This allows core power consumption to be reduced by supplying it with a lower voltage than the
I/O lines. The VDDCORE pins must never be powered at a voltage greater than the supply volt-
age applied to the VDDIO pins.
Typical supported voltage combinations are shown in the following table:
The EBI generates the signals which control the access to the external memory or peripheral
devices. The EBI is fully programmable and can address up to 64M bytes. It has eight chip
selects and a 24-bit address bus, the upper four bits of which are multiplexed with a chip select.
The 16-bit data bus can be configured to interface with 8- or 16-bit external devices. Separate
read and write control signals allow for direct memory and peripheral interfacing.
The EBI supports different access protocols allowing single clock cycle memory accesses.
The main features are:
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•
•
•
•
•
•
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The AT91M43300 has an 8-level priority, individually maskable, vectored interrupt controller.
This feature substantially reduces the software and real time overhead in handling internal and
external interrupts.
The interrupt controller is connected to the NFIQ (fast interrupt request) and the NIRQ (standard
interrupt request) inputs of the ARM7TDMI processor. The processor’s NFIQ line can only be
asserted by the external fast interrupt request input: FIQ. The NIRQ line can be asserted by the
interrupts generated by the on-chip peripherals and the external interrupt request lines: IRQ0 to
IRQ3.
VDDCORE
VDDIO
VDDCORE pins, which power the chip core
VDDIO pins, which power the I/O lines
External memory mapping
Up to 8 chip select lines
8- or 16-bit data bus
Byte write or byte select lines
Remap of boot memory
Two different read protocols
Programmable wait state generation
External wait request
Programmable data float time
Pins
3.0V or 3.3V
5.0V
Typical Supply Voltages
3.0V or 3.3V
3.0V or 3.3V
3.0V or 3.3V
2.0V
1322B–ATARM–12-Dec-05