AT89C51CC03U-RDRIM Atmel, AT89C51CC03U-RDRIM Datasheet - Page 8

• Manufacturer Part Number: AT89C51CC03U-RDRIM
• Description: IC 8051 MCU FLASH 64K 64VQFP
• Manufacturer: Atmel
• Series: AT89C CANr

Specifications of AT89C51CC03U-RDRIM

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 40MHz
• Connectivity: CAN, SPI, UART/USART
• Peripherals: POR, PWM, WDT
• Number Of I /o: 36
• Program Memory Size: 64KB (64K x 8)
• Program Memory Type: FLASH
• Eeprom Size: 2K x 8
• Ram Size: 2.25K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 64-TQFP, 64-VQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: AT89C51CC03URDRTR

Physical Layer
CAN Controller
Initialization
8
AT89C51CC03 CAN Bootloader
The CAN is used to transmit information has the following configuration:
•
•
•
Two ways are possible to initialize the CAN controller:
•
•
The selection between these two solutions is made with EB:
•
•
CANBT1:3 and EB can be modified by user through a set of API or with ISP commands.
The figure below describes the CAN controller flow.
Figure 2. CAN Controller Initialization
Standard Frame CAN format 2.0A (identifier 11-bit)
Frame: Data Frame
Baud rate: autobaud is performed by the bootloader
Use the software autobaud
Use the user configuration stored in the CANBT1, CANBT2 and CANBT3
EB = FFh: the autobaud is performed.
EB not equal to FFh: the CANBT1:2:3 are used.
Read CANBT1 value
Read CANBT2 value
Read CANBT3 value
Configure the CAN
CANBTx = FFh
CAN controller
Initialization
CAN macro
CAN Error
EB = FFh
Initialized
controller
x=(1,3)
No
No
No
Yes
Yes
Yes
Yes
Set the CAN controller in
autobaud mode
Autobaud ok
No
4251B–CAN–03/08