T89C51CC01UA-RLTIM Atmel, T89C51CC01UA-RLTIM Datasheet - Page 8

• Manufacturer Part Number: T89C51CC01UA-RLTIM
• Description: IC 8051 MCU FLASH 32K 44VQFP
• Manufacturer: Atmel
• Series: AT89C CANr

Specifications of T89C51CC01UA-RLTIM

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 40MHz
• Connectivity: CAN, UART/USART
• Peripherals: POR, PWM, WDT
• Number Of I /o: 32
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: FLASH
• Eeprom Size: 2K x 8
• Ram Size: 1.25K 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: 44-TQFP, 44-VQFP
• For Use With: AT89STK-06 - KIT DEMOBOARD 8051 MCU W/CAN
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: T89C51CC01UARLTIM

Physical Layer
CAN Controller
Initialization
8
T89C51CC01 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 4. 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
Controller
Initialized
x=(1,3)
No
No
No
Yes
Yes
Yes
Yes
Set the CAN Controller in
Autobaud Mode
Autobaud OK
No
4210E–CAN–03/08