Owner's manual
Table Of Contents
- 8-bit MCU with CAN controller and Flash
- 1. Description
- 2. Features
- 3. Block Diagram
- 4. Pin Configuration
- 5. SFR Mapping
- 6. Clock
- 7. Program/Code Memory
- 8. Data Memory
- 9. EEPROM data memory
- 10. In-System-Programming (ISP)
- 11. Serial I/O Port
- 12. Timers/Counters
- 13. Timer 2
- 14. WatchDog Timer
- 15. Atmel CAN Controller
- 15.1. Introduction
- 15.2. CAN Controller Description
- 15.3. CAN Controller Mailbox and Registers Organization
- 15.4. IT CAN management
- 15.5. Bit Timing and BaudRate
- 15.6. Fault Confinement
- 15.7. Acceptance filter
- 15.8. Data and Remote frame
- 15.9. Time Trigger Communication (TTC) and Message Stamping
- 15.10. CAN Autobaud and Listening mode
- 15.11. CAN SFR’s
- 15.12. Registers
- 16. Programmable Counter Array PCA
- 17. Analog-to-Digital Converter (ADC)
- 18. Interrupt System
- 19. Electrical Characteristics
- 20. Ordering Information
Rev.A - May 17, 2001 79
Preliminary
T89C51CC02
15.10. CAN Autobaud and Listening mode
To activate the Autobaud feature, the AUTOBAUD bit in the CANGCON register is set. In this mode, the CAN
controller is only listening to the line without acknowledging the received messages. It cannot send any message.
The error flags are updated. The bit timing can be adjusted until no error occurs (good configuration find).
In this mode, the error counters are frozen.
To go back to the standard mode, the AUTOBAUD bit must be cleared by the software.
Figure 64. Autobaud Mode
0
1
TxDC
RxDC’
AUTOBAUD
CANGCON.3
RxDC
TxDC’