MC68HC08GZ32 Datasheet, PDF (139/320 Pages) Freescale Semiconductor, Inc – Microcontrollers

Programmer’s Model of Control Registers
RWRNIF — Receiver Warning Interrupt Flag
This flag is set when the MSCAN08 goes into warning status due to the receive error counter (REC)
exceeding 96 and neither one of the error interrupt flags or the bus-off interrupt flag is set⁽¹⁾. If not
masked, an error interrupt is pending while this flag is set.
1 = MSCAN08 has gone into receiver warning status.
0 = No receiver warning status has been reached.
TWRNIF — Transmitter Warning Interrupt Flag
This flag is set when the MSCAN08 goes into warning status due to the transmit error counter (TEC)
exceeding 96 and neither one of the error interrupt flags or the bus-off interrupt flag is set⁽²⁾. If not
masked, an error interrupt is pending while this flag is set.
1 = MSCAN08 has gone into transmitter warning status.
0 = No transmitter warning status has been reached.
RERRIF — Receiver Error Passive Interrupt Flag
This flag is set when the MSCAN08 goes into error passive status due to the receive error counter
exceeding 127 and the bus-off interrupt flag is not set⁽³⁾. If not masked, an error interrupt is pending
while this flag is set.
1 = MSCAN08 has gone into receiver error passive status.
0 = No receiver error passive status has been reached.
TERRIF — Transmitter Error Passive Interrupt Flag
This flag is set when the MSCAN08 goes into error passive status due to the transmit error counter
exceeding 127 and the bus-off interrupt flag is not set⁽⁴⁾. If not masked, an error interrupt is pending
while this flag is set.
1 = MSCAN08 went into transmit error passive status.
0 = No transmit error passive status has been reached.
BOFFIF — Bus-Off Interrupt Flag
This flag is set when the MSCAN08 goes into bus-off status, due to the transmit error counter
exceeding 255. It cannot be cleared before the MSCAN08 has monitored 128 times 11 consecutive
‘recessive’ bits on the bus. If not masked, an error interrupt is pending while this flag is set.
1 = MSCAN08has gone into bus-off status.
0 = No bus-off status has been reached.
OVRIF — Overrun Interrupt Flag
This flag is set when a data overrun condition occurs. If not masked, an error interrupt is pending while
this flag is set.
1 = A data overrun has been detected since last clearing the flag.
0 = No data overrun has occurred.
1. Condition to set the flag: RWRNIF = (96 → REC) & RERRIF & TERRIF & BOFFIF
2. Condition to set the flag: TWRNIF = (96 → TEC) & RERRIF & TERRIF & BOFFIF
3. Condition to set the flag: RERRIF = (127 → REC → 255) & BOFFIF
4. Condition to set the flag: TERRIF = (128 → TEC → 255) & BOFFIF
MC68HC08GZ32 Data Sheet, Rev. 3
Freescale Semiconductor
139