MC9S08DZ60CLH Datasheet, PDF (235/416 Pages) Freescale Semiconductor, Inc – MC9S08DZ60 Series Features

Chapter 12 Freescale’s Controller Area Network (S08MSCANV1)
12.3.9 MSCAN Transmitter Message Abort Acknowledge Register
(CANTAAK)
The CANTAAK register indicates the successful abort of messages queued for transmission, if requested
by the appropriate bits in the CANTARQ register.
7
6
5
4
3
2
1
0
R
0
0
0
0
0
ABTAK2 ABTAK1 ABTAK0
W
Reset:
0
0
0
0
0
0
0
0
= Unimplemented
Figure 12-13. MSCAN Transmitter Message Abort Acknowledge Register (CANTAAK)
NOTE
The CANTAAK register is held in the reset state when the initialization
mode is active (INITRQ = 1 and INITAK = 1).
Read: Anytime
Write: Unimplemented for ABTAKx flags
Table 12-14. CANTAAK Register Field Descriptions
Field
Description
2:0
ABTAK[2:0]
Abort Acknowledge — This flag acknowledges that a message was aborted due to a pending transmission
abort request from the CPU. After a particular message buffer is flagged empty, this flag can be used by the
application software to identify whether the message was aborted successfully or was sent anyway. The ABTAKx
flag is cleared whenever the corresponding TXE flag is cleared.
0 The message was not aborted.
1 The message was aborted.
12.3.10 MSCAN Transmit Buffer Selection Register (CANTBSEL)
The CANTBSEL selections of the actual transmit message buffer, which is accessible in the CANTXFG
register space.
7
6
5
4
3
2
1
0
R
0
0
0
0
0
TX2
TX1
TX0
W
Reset:
0
0
0
0
0
0
0
0
= Unimplemented
Figure 12-14. MSCAN Transmit Buffer Selection Register (CANTBSEL)
MC9S08DZ60 Series Data Sheet, Rev. 4
Freescale Semiconductor
235