SC9S12XS256J1MAA FREESCALE [Freescale Semiconductor, Inc], SC9S12XS256J1MAA Datasheet - Page 311
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SC9S12XS256J1MAA
Manufacturer Part Number
SC9S12XS256J1MAA
Description
HCS12 Microcontrollers
Manufacturer
FREESCALE [Freescale Semiconductor, Inc]
Datasheet
1.SC9S12XS256J1MAA.pdf
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11.3.2.10 MSCAN Transmitter Message Abort Acknowledge Register (CANTAAK)
The CANTAAK register indicates the successful abort of a queued message, if requested by the
appropriate bits in the CANTARQ register.
1. Read: Anytime
11.3.2.11 MSCAN Transmit Buffer Selection Register (CANTBSEL)
The CANTBSEL register allows the selection of the actual transmit message buffer, which then will be
accessible in the CANTXFG register space.
1. Read: Find the lowest ordered bit set to 1, all other bits will be read as 0
Freescale Semiconductor
Module Base + 0x0009
Module Base + 0x000A
ABTAK[2:0]
Write: Unimplemented
Write: Anytime when not in initialization mode
Field
2-0
Reset:
Reset:
W
W
R
R
Figure 11-13. MSCAN Transmitter Message Abort Acknowledge Register (CANTAAK)
Abort Acknowledge — This flag acknowledges that a message was aborted due to a pending 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.
The CANTAAK register is held in the reset state when the initialization
mode is active (INITRQ = 1 and INITAK = 1).
0
0
0
0
7
7
Figure 11-14. MSCAN Transmit Buffer Selection Register (CANTBSEL)
= Unimplemented
= Unimplemented
Table 11-16. CANTAAK Register Field Descriptions
6
0
0
6
0
0
S12XS Family Reference Manual Rev. 1.09
0
0
0
0
5
5
NOTE
4
0
0
4
0
0
Description
Freescale’s Scalable Controller Area Network (S12MSCANV3)
0
0
0
0
3
3
ABTAK2
TX2
2
0
2
0
Access: User read/write
Access: User read/write
ABTAK1
TX1
0
0
1
1
ABTAK0
TX0
0
0
0
0
311
(1)
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