Information

PIC18F2480/2580/4480/4580

DS80496C-page 8  2010 Microchip Technology Inc.

7. Module: ECAN™ Technology

Under specific conditions, the first five bits of a

transmitted identifier may not match the value in

the Transmit Buffer ID register, TXBnSIDH. The

following conditions must exist for the corruption

to occur:

• A transmit message must be pending

• The ECAN module must detect a

Start-of-Frame (SOF) in the third bit of the

interframe space.

Work around

None.

Affected Silicon Revisions

8. Module: ECAN Technology

The Error Interrupt Flag, ERRIF (PIR3<5>), may

not be able to be cleared in software after either

of the following counter registers exceeds 127:

• Transmit Error Counter Register (TXERRCNT)

• Receive Error Counter Register (RXERRCNT)

Work around

Monitor the EWARN (COMSTAT<0>) bit to

determine if either the TXERRCNT or the

RXERRCNT exceeds 95 and clear the ERRIF

flag before either counter reaches 127.

Affected Silicon Revisions

9. Module: ECAN Technology

Following an error on the bus, the ECAN module

is unable to switch from Listen Only mode

directly to Configuration mode.

Work around

Use the REQOP (CANCON<7:5>) bits to select

Normal mode as an intermediate step when

switching from Listen Only mode to Configuration

mode.

Affected Silicon Revisions

A1 B0 B2