mc68hc912dg128 Freescale Semiconductor, Inc, mc68hc912dg128 Datasheet - Page 350

• Manufacturer Part Number: mc68hc912dg128
• Description: M68hc12 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

MSCAN Controller
17.13.11 msCAN12 Receive Error Counter (CRXERR)
17.13.12 msCAN12 Transmit Error Counter (CTXERR)
17.13.13 msCAN12 Identifier Acceptance Registers (CIDAR0–7)
Technical Data
350
CTXERR
CRXERR
$010F
$010E
RESET
RESET
W
W
R
R
NOTE:
TXERR7
RXERR7
Bit 7
Bit 7
0
0
This register reflects the status of the msCAN12 receive error counter.
The register is read only.
This register reflects the status of the msCAN12 transmit error counter.
The register is read only.
Both error counters must only be read when in SLEEP or SOFT_RESET
mode.
On reception each message is written into the background receive
buffer. The CPU is only signalled to read the message however, if it
passes the criteria in the identifier acceptance and identifier mask
registers (accepted); otherwise, the message is overwritten by the next
message (dropped).
The acceptance registers of the msCAN12 are applied on the IDR0 to
IDR3 registers of incoming messages in a bit by bit manner.
For extended identifiers all four acceptance and mask registers are
applied. For standard identifiers only the first two (CIDMR0/1 and
CIDAR0/1) are applied. In the latter case it is required to program the
three last bits (AM2 – AM0) in the mask register CIDMR1 to ‘don’t care’.
RXERR6
TXERR6
Freescale Semiconductor, Inc.
6
0
6
0
For More Information On This Product,
RXERR5
TXERR5
Go to: www.freescale.com
5
0
5
0
MSCAN Controller
RXERR4
TXERR4
4
0
4
0
RXERR3
TXERR3
3
0
3
0
RXERR2
TXERR2
MC68HC912DG128 — Rev 3.0
2
0
2
0
RXERR1
TXERR1
1
0
1
0
MOTOROLA
RXERR0
TXERR0
Bit 0
Bit 0
0
0