P912XDP512F0MFVR datasheet(439/1350 Pages) FREESCALE

439 / 1350 page

Chapter 10 Freescale’s Scalable Controller Area Network (S12MSCANV3)

MC9S12XDP512 Data Sheet, Rev. 2.17

Freescale Semiconductor

439

Read: Always read 0x0000 in normal system operation modes

Write: Unimplemented in normal system operation modes

NOTE

Writing to this register when in special modes can alter the MSCAN

functionality.

10.3.2.14 MSCAN Miscellaneous Register (CANMISC)

This register provides additional features.

Read: Anytime

Write: Anytime; write of ‘1’ clears ﬂag; write of ‘0’ ignored

10.3.2.15 MSCAN Receive Error Counter (CANRXERR)

This register reﬂects the status of the MSCAN receive error counter.

76543210

00000000

Reset:

00000000

= Unimplemented

Figure 10-16. MSCAN Reserved Register

76543210

0000000

BOHOLD

Reset:

00000000

= Unimplemented

Figure 10-17. MSCAN Miscellaneous Register (CANMISC)

Table 10-19. CANMISC Register Field Descriptions

Field

Description

BOHOLD

Bus-off State Hold Until User Request — If BORM is set in Section 10.3.2.2, “MSCAN Control Register 1

(CANCTL1), this bit indicates whether the module has entered the bus-off state. Clearing this bit requests the

recovery from bus-off. Refer to Section 10.5.2, “Bus-Off Recovery,” for details.

0 Module is not bus-off or recovery has been requested by user in bus-off state

1 Module is bus-off and holds this state until user request

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