AT91SAM7X128 Atmel, AT91SAM7X128 Datasheet - Page 562

• Manufacturer Part Number: AT91SAM7X128
• Description: MCU 32-Bit 91S ARM7TDMI RISC 128KB Flash 1.8V/3.3V 100-Pin LQFP
• Manufacturer: Atmel

Specifications of AT91SAM7X128

• Package: 100LQFP
• Device Core: ARM7TDMI
• Family Name: 91S
• Maximum Speed: 55 MHz
• Ram Size: 32 KB
• Program Memory Size: 128 KB
• Operating Supply Voltage: 1.8|3.3 V
• Data Bus Width: 32 Bit
• Program Memory Type: Flash
• Number Of Programmable I/os: 62
• Interface Type: CAN/Ethernet/SPI/I2S/TWI/USART/USB
• On-chip Adc: 8-chx10-bit
• Operating Temperature: -40 to 85 °C
• Number Of Timers: 3

• MACR: Abort Request for Mailbox x
It is possible to set MACR field for several mailboxes in the same time, setting several bits to the CAN_ACR register.
• MTCR: Mailbox Transfer Command
This flag clears the MRDY and MABT flags in the CAN_MSRx register.
When several mailboxes are requested to be transmitted simultaneously, they are transmitted in turn. The mailbox with the
highest priority is serviced first. If several mailboxes have the same priority, the mailbox with the lowest number is serviced
first (i.e., MBx0 will be serviced before MBx 15 if they have the same priority).
It is possible to set MTCR for several mailboxes at the same time by writing to the CAN_TCR register.
6120H–ATARM–17-Feb-09
Receive with overwrite
Receive with overwrite
Mailbox Object Type
Mailbox Object Type
Consumer
Consumer
Producer
Producer
Transmit
Transmit
Receive
Receive
Description
No action
No action
Cancels transfer request if the message has not been transmitted to the
CAN transceiver.
Cancels the current transfer before the remote frame has been sent.
Cancels the current transfer. The next remote frame will not be serviced.
Description
Allows the reception of the next message.
Triggers a new reception.
Sends data prepared in the mailbox as soon as possible.
Sends a remote transmission frame.
Sends data prepared in the mailbox after receiving a remote frame from a
Consumer.
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