SAM7X512 Atmel Corporation, SAM7X512 Datasheet - Page 523
SAM7X512
Manufacturer Part Number
SAM7X512
Description
Manufacturer
Atmel Corporation
Specifications of SAM7X512
Flash (kbytes)
512 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)
128
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
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Figure 36-13. Chaining Three Mailboxes to Receive a Buffer Split into Three Messages
6120I–ATARM–06-Apr-11
(CAN_MSRx)
(CAN_MSRx)
(CAN_MSRy)
(CAN_MSRy)
(CAN_MSRz)
(CAN_MSRz)
CAN BUS
MRDY
MRDY
MRDY
MMI
MMI
MMI
If several mailboxes are chained to receive a buffer split into several messages, all mailboxes
except the last one (with the highest number) must be configured in Receive Mode. The first
message received is handled by the first mailbox, the second one is refused by the first mailbox
and accepted by the second mailbox, the last message is accepted by the last mailbox and
refused by previous ones (see
If the number of mailboxes is not sufficient (the MMI flag of the last mailbox raises), the user
must read each data received on the last mailbox in order to retrieve all the messages of the buf-
fer split (see
Message s1
Figure
36-14).
Reading CAN_MDH & CAN_MDL for mailboxes x, y and z
Reading CAN_MSRx, CAN_MSRy and CAN_MSRz
Message s2
Figure
36-13).
Message s3
Writing MBx MBy MBz in CAN_TCR
SAM7X512/256/128
Buffer split in 3 messages
523
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