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PDF AT91SAM7X512 Data sheet ( Hoja de datos )
| Número de pieza | AT91SAM7X512 | |
| Descripción | AT91 ARM Thumb-based Microcontrollers | |
| Fabricantes | ATMEL Corporation | |
| Logotipo |  |
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Features
• Incorporates the ARM7TDMI® ARM® Thumb® Processor
– High-performance 32-bit RISC Architecture
– High-density 16-bit Instruction Set
– Leader in MIPS/Watt
– EmbeddedICE™ In-circuit Emulation, Debug Communication Channel Support
• Internal High-speed Flash
– 512 Kbytes (AT91SAM7X512) Organized in Two Banks of 1024 Pages of
256 Bytes (Dual Plane)
– 256 Kbytes (AT91SAM7X256) Organized in 1024 Pages of 256 Bytes (Single Plane)
– 128 Kbytes (AT91SAM7X128) Organized in 512 Pages of 256 Bytes (Single Plane)
– Single Cycle Access at Up to 30 MHz in Worst Case Conditions
– Prefetch Buffer Optimizing Thumb Instruction Execution at Maximum Speed
– Page Programming Time: 6 ms, Including Page Auto-erase,
Full Erase Time: 15 ms
– 10,000 Write Cycles, 10-year Data Retention Capability,
Sector Lock Capabilities, Flash Security Bit
– Fast Flash Programming Interface for High Volume Production
• Internal High-speed SRAM, Single-cycle Access at Maximum Speed
– 128 Kbytes (AT91SAM7X512)
– 64 Kbytes (AT91SAM7X256)
– 32 Kbytes (AT91SAM7X128)
• Memory Controller (MC)
– Embedded Flash Controller, Abort Status and Misalignment Detection
• Reset Controller (RSTC)
– Based on Power-on Reset Cells and Low-power Factory-calibrated Brownout
Detector
– Provides External Reset Signal Shaping and Reset Source Status
• Clock Generator (CKGR)
– Low-power RC Oscillator, 3 to 20 MHz On-chip Oscillator and one PLL
• Power Management Controller (PMC)
– Power Optimization Capabilities, Including Slow Clock Mode (Down to 500 Hz) and
Idle Mode
– Four Programmable External Clock Signals
• Advanced Interrupt Controller (AIC)
– Individually Maskable, Eight-level Priority, Vectored Interrupt Sources
– Two External Interrupt Sources and One Fast Interrupt Source, Spurious Interrupt
Protected
• Debug Unit (DBGU)
– 2-wire UART and Support for Debug Communication Channel interrupt,
Programmable ICE Access Prevention
• Periodic Interval Timer (PIT)
– 20-bit Programmable Counter plus 12-bit Interval Counter
• Windowed Watchdog (WDT)
– 12-bit key-protected Programmable Counter
– Provides Reset or Interrupt Signals to the System
– Counter May Be Stopped While the Processor is in Debug State or in Idle Mode
• Real-time Timer (RTT)
– 32-bit Free-running Counter with Alarm
– Runs Off the Internal RC Oscillator
AT91 ARM
Thumb-based
Microcontrollers
AT91SAM7X512
AT91SAM7X256
AT91SAM7X128
Summary
Preliminary
NOTE: This is a summary document.
The complete document is available on
the Atmel website at www.atmel.com.
6120DS–ATARM–03-Oct-06
1 page  
AT91SAM7X512/256/128 Preliminary Summary
3. Signal Description
Table 3-1. Signal Description List
Signal Name
VDDIN
VDDOUT
VDDFLASH
VDDIO
VDDCORE
VDDPLL
GND
XIN
XOUT
PLLRC
PCK0 - PCK3
TCK
TDI
TDO
TMS
JTAGSEL
ERASE
NRST
TST
DRXD
DTXD
IRQ0 - IRQ1
FIQ
PA0 - PA30
PB0 - PB30
Function
Type
Power
Voltage Regulator and ADC Power
Supply Input
Power
Voltage Regulator Output
Power
Flash and USB Power Supply
Power
I/O Lines Power Supply
Power
Core Power Supply
Power
PLL Power
Ground
Ground
Clocks, Oscillators and PLLs
Main Oscillator Input
Input
Main Oscillator Output
Output
PLL Filter
Input
Programmable Clock Output
Output
ICE and JTAG
Test Clock
Input
Test Data In
Input
Test Data Out
Output
Test Mode Select
Input
JTAG Selection
Input
Flash Memory
Flash and NVM Configuration Bits Erase
Command
Input
Reset/Test
Microcontroller Reset
I/O
Test Mode Select
Debug Receive Data
Debug Transmit Data
External Interrupt Inputs
Fast Interrupt Input
Parallel IO Controller A
Parallel IO Controller B
Input
Debug Unit
Input
Output
AIC
Input
Input
PIO
I/O
I/O
Active
Level
High
Low
High
Comments
3V to 3.6V
1.85V
3V to 3.6V
3V to 3.6V
1.65V to 1.95V
1.65V to 1.95V
No pull-up resistor
No pull-up resistor.
No pull-up resistor.
Pull-down resistor.
Pull-down resistor
Pull-up resistor, Open Drain
Output
Pull-down resistor
Pulled-up input at reset
Pulled-up input at reset
6120DS–ATARM–03-Oct-06
5
5 Page 
AT91SAM7X512/256/128 Preliminary Summary
5. Power Considerations
5.1 Power Supplies
The AT91SAM7X512/256/128 has six types of power supply pins and integrates a voltage regu-
lator, allowing the device to be supplied with only one voltage. The six power supply pin types
are:
• VDDIN pin. It powers the voltage regulator and the ADC; voltage ranges from 3.0V to 3.6V,
3.3V nominal. In order to decrease current consumption, if the voltage regulator and the ADC
are not used, VDDIN, ADVREF, AD4, AD5, AD6 and AD7 should be connected to GND. In
this case, VDDOUT should be left unconnected.
• VDDOUT pin. It is the output of the 1.8V voltage regulator.
• VDDIO pin. It powers the I/O lines; voltage ranges from 3.0V to 3.6V, 3.3V nominal.
• VDDFLASH pin. It powers the USB transceivers and a part of the Flash and is required for
the Flash to operate correctly; voltage ranges from 3.0V to 3.6V, 3.3V nominal.
• VDDCORE pins. They power the logic of the device; voltage ranges from 1.65V to 1.95V,
1.8V typical. It can be connected to the VDDOUT pin with decoupling capacitor. VDDCORE
is required for the device, including its embedded Flash, to operate correctly.
• VDDPLL pin. It powers the oscillator and the PLL. It can be connected directly to the
VDDOUT pin.
No separate ground pins are provided for the different power supplies. Only GND pins are pro-
vided and should be connected as shortly as possible to the system ground plane.
5.2 Power Consumption
The AT91SAM7X512/256/128 has a static current of less than 60 µA on VDDCORE at 25°C,
including the RC oscillator, the voltage regulator and the power-on reset when the brownout
detector is deactivated. Activating the brownout detector adds 28 µA static current.
The dynamic power consumption on VDDCORE is less than 90 mA at full speed when running
out of the Flash. Under the same conditions, the power consumption on VDDFLASH does not
exceed 10 mA.
5.3 Voltage Regulator
The AT91SAM7X512/256/128 embeds a voltage regulator that is managed by the System
Controller.
In Normal Mode, the voltage regulator consumes less than 100 µA static current and draws 100
mA of output current.
The voltage regulator also has a Low-power Mode. In this mode, it consumes less than 25 µA
static current and draws 1 mA of output current.
Adequate output supply decoupling is mandatory for VDDOUT to reduce ripple and avoid oscil-
lations. The best way to achieve this is to use two capacitors in parallel: one external 470 pF (or
1 nF) NPO capacitor should be connected between VDDOUT and GND as close to the chip as
possible. One external 2.2 µF (or 3.3 µF) X7R capacitor should be connected between VDDOUT
and GND.
6120DS–ATARM–03-Oct-06
11
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet AT91SAM7X512.PDF ] | |
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