32186 datasheet(640/1032 Pages) RENESAS

640 / 1032 page

CAN MODULE

13-30

32185/32186 Group Hardware Manual

Rev.1.10 REJ09B0235-0110 May 15, 07

(1) BOS (Bus Off Status) bit (Bit 1)

When BOS bit = "1," it means that the CAN module is in a bus off state.

[Set condition]

This bit is set to "1" when the transmit error count register value exceeded 255 and a bus off state is

entered.

[Clear condition]

This bit is cleared when restored from the bus off state.

(2) EPS (Error Passive Status) bit (Bit 2)

When EPS bit = "1," it means that the CAN module is in an error passive state.

[Set condition]

This bit is set to "1" when the transmit or receive error count register value exceeded 127 and an error

passive state is entered.

[Clear condition]

This bit is cleared when restored from the error passive state.

(3) CBS (CAN Bus Error) bit (Bit 3)

[Set condition]

This bit is set to "1" when an error is detected on the CAN bus.

[Clear condition]

This bit is cleared when the CAN module finished sending or receiving normally.

(4) BCS (BasicCAN Status) bit (Bit 4)

When BCS bit = "1," it means that the CAN module is operating in BasicCAN mode.

[Set condition]

This bit is set to "1" when the CAN module is operating in BasicCAN mode. BasicCAN mode is useful

when the following conditions are met:

• CAN Control Register BCM bit = "1"

• Slots 30 and 31 both are set for data frame reception

[Clear condition]

This bit is cleared by clearing the BCM bit to "0."

(5) LBS (Loopback Status) bit (Bit 6)

When LBS bit = "1," it means that the CAN module is operating in loopback mode.

[Set condition]

This bit is set to "1" by setting the CAN Control Register LBM (loopback mode) bit to "1."

[Clear condition]

This bit is cleared by clearing the LBM bit to "0."

13.2 CAN Module Related Registers

32186 Datasheet(PDF) 640 Page - Renesas Technology Corp