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PDF SAM7X512 Data sheet ( Hoja de datos )
| Número de pieza | SAM7X512 | |
| Descripción | ARM-based Flash MCU | |
| Fabricantes | ATMEL Corporation | |
| Logotipo |  |
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ARM-based Flash MCU
SAM7X512 / SAM7X256 / SAM7X128
SUMMARY DATASHEET
Description
The Atmel SAM7X512/256/128 is a highly-integrated Flash microcontroller based on
the 32-bit ARM® RISC processor. It features 512/256/128 Kbytes of high-speed Flash
and 128/64/32 Kbytes of SRAM, a large set of peripherals, including an 802.3 Ethernet
MAC, and a CAN controller. A complete set of system functions minimizes the number
of external components.
The embedded Flash memory can be programmed in-system via the JTAG-ICE
interface or via a parallel interface on a production programmer prior to mounting. Built-
in lock bits and a security bit protect the firmware from accidental overwrite and
preserve its confidentiality.
The SAM7X512/256/128 system controller includes a reset controller capable of
managing the power-on sequence of the microcontroller and the complete system.
Correct device operation can be monitored by a built-in brownout detector and a
watchdog running off an integrated RC oscillator.
By combining the ARM7TDMI® processor with on-chip Flash and SRAM, and a wide
range of peripheral functions, including USART, SPI, CAN controller, Ethernet MAC,
Timer Counter, RTT and analog-to-digital converters on a monolithic chip, the
SAM7X512/256/128 is a powerful device that provides a flexible, cost-effective solution
to many embedded control applications requiring communication over Ethernet, wired
CAN and ZigBee® wireless networks.
This is a summary document.
The complete document is
available on the Atmel website
at www.atmel.com.
6120IS–ATARM–14-Nov-13
1 page  
2. SAM7X512/256/128 Block Diagram
Figure 2-1. SAM7X512/256/128 Block Diagram
TDI
TDO
TMS
TCK
JTAGSEL
TST
FIQ
IRQ0-IRQ1
DRXD
DTXD
PCK0-PCK3
PLLRC
XIN
XOUT
VDDCORE
VDDFLASH
VDDCORE
NRST
RXD0
TXD0
SCK0
RTS0
CTS0
RXD1
TXD1
SCK1
RTS1
CTS1
DCD1
DSR1
DTR1
RI1
SPI0_NPCS0
SPI0_NPCS1
SPI0_NPCS2
SPI0_NPCS3
SPI0_MISO
SPI0_MOSI
SPI0_SPCK
SPI1_NPCS0
SPI1_NPCS1
SPI1_NPCS2
SPI1_NPCS3
SPI1_MISO
SPI1_MOSI
SPI1_SPCK
ADTRG
AD0
AD1
AD2
AD3
AD4
AD5
AD6
AD7
ADVREF
JTAG
SCAN
ICE
System Controller
ARM7TDMI
Processor
1.8 V
Voltage
Regulator
AIC
PDC
DBGU
PDC
PLL
OSC
PMC
RCOSC
BOD
POR
Reset
Controller
Memory Controller
Embedded
Flash
Controllers
Address
Decoder
Abort
Status
Misalignment
Detection
Peripheral Bridge
Peripheral DMA
Controller
13 Channels
SRAM
128/64/32 Kbytes
Flash
512/256/128
Kbytes
ROM
Fast Flash
Programming
Interface
PIOA
PIT
WDT
RTT
PIOB
APB
PDC
USART0
PDC
PDC
USART1
SAM-BA
DMA
FIFO
Ethernet MAC 10/100
FIFO
USB Device
PDC
PDC
SPI0
PDC
PDC
SPI1
PDC
PDC
ADC
PWMC
PDC
SSC
PDC
Timer Counter
TC0
TC1
TC2
TWI
CAN
VDDIN
GND
VDDOUT
VDDCORE
VDDIO
VDDFLASH
ERASE
PGMRDY
PGMNVALID
PGMNOE
PGMCK
PGMM0-PGMM3
PGMD0-PGMD15
PGMNCMD
PGMEN0-PGMEN1
ETXCK-ERXCK-EREFCK
ETXEN-ETXER
ECRS-ECOL, ECRSDV
ERXER-ERXDV
ERX0-ERX3
ETX0-ETX3
EMDC
EMDIO
EF100
VDDFLASH
DDM
DDP
PWM0
PWM1
PWM2
PWM3
TF
TK
TD
RD
RK
RF
TCLK0
TCLK1
TCLK2
TIOA0
TIOB0
TIOA1
TIOB1
TIOA2
TIOB2
TWD
TWCK
CANRX
CANTX
SAM7X Series [SUMMARY DATASHEET]
6120IS–ATARM–14-Nov-13
5
5 Page 
5. Power Considerations
5.1 Power Supplies
The SAM7X512/256/128 has six types of power supply pins and integrates a voltage regulator, 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 provided and should be
connected as shortly as possible to the system ground plane.
5.2 Power Consumption
The SAM7X512/256/128 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 SAM7X512/256/128 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 oscillations. 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.
Adequate input supply decoupling is mandatory for VDDIN in order to improve startup stability and reduce source voltage
drop. The input decoupling capacitor should be placed close to the chip. For example, two capacitors can be used in
parallel: 100 nF NPO and 4.7 μF X7R.
5.4 Typical Powering Schematics
The SAM7X512/256/128 supports a 3.3V single supply mode. The internal regulator input connected to the 3.3V source
and its output feeds VDDCORE and the VDDPLL. Figure 5-1 shows the power schematics to be used for USB bus-
powered systems.
SAM7X Series [SUMMARY DATASHEET]
6120IS–ATARM–14-Nov-13
11
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet SAM7X512.PDF ] | |
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