SAM7X256 Atmel Corporation, SAM7X256 Datasheet - Page 505

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SAM7X256

Manufacturer Part Number
SAM7X256
Description
Manufacturer
Atmel Corporation
Datasheets

Specifications of SAM7X256

Flash (kbytes)
256 Kbytes
Pin Count
100
Max. Operating Frequency
55 MHz
Cpu
ARM7TDMI
Hardware Qtouch Acquisition
No
Max I/o Pins
62
Ext Interrupts
62
Usb Transceiver
1
Usb Speed
Full Speed
Usb Interface
Device
Spi
2
Twi (i2c)
1
Uart
3
Can
1
Ssc
1
Ethernet
1
Graphic Lcd
No
Video Decoder
No
Camera Interface
No
Adc Channels
8
Adc Resolution (bits)
10
Adc Speed (ksps)
384
Resistive Touch Screen
No
Temp. Sensor
No
Crypto Engine
No
Sram (kbytes)
64
Self Program Memory
NO
Dram Memory
No
Nand Interface
No
Picopower
No
Temp. Range (deg C)
-40 to 85
I/o Supply Class
3.3
Operating Voltage (vcc)
3.0 to 3.6
Fpu
No
Mpu / Mmu
no / no
Timers
3
Output Compare Channels
3
Input Capture Channels
3
Pwm Channels
4
32khz Rtc
Yes
Calibrated Rc Oscillator
No
36.3
36.4
Table 36-1.
36.5
36.5.1
36.5.2
36.5.3
6120I–ATARM–06-Apr-11
Name
CANRX
CANTX
Application Block Diagram
I/O Lines Description
Product Dependencies
I/O Lines
Power Management
Interrupt
I/O Lines Description
Description
CAN Receive Serial Data
CAN Transmit Serial Data
Figure 36-2.
The pins used for interfacing the CAN may be multiplexed with the PIO lines. The programmer
must first program the PIO controller to assign the desired CAN pins to their peripheral function.
If I/O lines of the CAN are not used by the application, they can be used for other purposes by
the PIO Controller.
The programmer must first enable the CAN clock in the Power Management Controller (PMC)
before using the CAN.
A Low-power Mode is defined for the CAN controller: If the application does not require CAN
operations, the CAN clock can be stopped when not needed and be restarted later. Before stop-
ping the clock, the CAN Controller must be in Low-power Mode to complete the current transfer.
After restarting the clock, the application must disable the Low-power Mode of the CAN
controller.
The CAN interrupt line is connected on one of the internal sources of the Advanced Interrupt
Controller. Using the CAN interrupt requires the AIC to be programmed first. Note that it is not
recommended to use the CAN interrupt line in edge-sensitive mode.
Application Block Diagram
CAN-based Application Layer
CAN Data Link Layer
CAN-based Profiles
CAN Physical Layer
Layers
SAM7X512/256/128
Implementation
CAN Controller
Transceiver
Software
Software
Type
Input
Output
505

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