T89C51CC01CA ATMEL [ATMEL Corporation], T89C51CC01CA Datasheet - Page 3

• Manufacturer Part Number: T89C51CC01CA
• Description: 80C51 MCUs
• Manufacturer: ATMEL [ATMEL Corporation]

11. CAN – CANCONCH Harmless Corruption
12. Flash/EEPROM – First Read After Load Disturbed
4131C–8051–11/02
The fix for Errata number 6 (Lost CAN Error Interrupt), fixes the problem. However, when the stuff error occurs, the
CONCH1, CONCH0 bits in CANCONCH are corrupted. This corruption has no effect on the behavior of the Transmit
channel.
Workaround
No workaround is required, re-writing CANCONCH to start a new message resolves the corruption.
In the "In-Application Programming" mode from the Flash, if the User software application load the Column Latch Area
prior to call the programming sequence in the CAN Bootloader.
The "Read after load" issue leads to a wrong Opcode Fetch during the column latch load sequence.
Workaround
Update of the Flash API Library. A NOP instruction has to be inserted after the load instruction.
MOVX @DPTR,A ;Load Column latches
NOP ; ADDED INSTRUCTION
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