AT91SAM7X128 Atmel, AT91SAM7X128 Datasheet - Page 507

• 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

36.3
36.4
Table 36-1.
36.5
36.5.1
36.5.2
36.5.3
6120H–ATARM–17-Feb-09
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
AT91SAM7X512/256/128 Preliminary
CAN Data Link Layer
CAN-based Profiles
CAN Physical Layer
Layers
Implementation
CAN Controller
Transceiver
Software
Software
Type
Input
Output
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