mc68hc08az60 Freescale Semiconductor, Inc, mc68hc08az60 Datasheet - Page 348

• Manufacturer Part Number: mc68hc08az60
• Description: M68hc08 Family Of 8-bit Microcontroller Units Mcus
• Manufacturer: Freescale Semiconductor, Inc

MSCAN Controller (MSCAN08)
MSCAN08
Transmitter Control
Register
MC68HC08AZ60 — Rev 1.0
348
NOTE:
NOTE:
Address:
ABTRQ2–ABTRQ0 — Abort Request
The software must not clear one or more of the TXE flags in CTFLG and
simultaneaously set the respective ABTRQ bit(s).
TXEIE2–TXEIE0 — Transmitter Empty Interrupt Enable
The CTCR register is held in the reset state when the SFTRES bit in
CMCR0 is set.
Reset:
Read:
Write:
Freescale Semiconductor, Inc.
The CPU sets an ABTRQx bit to request that an already scheduled
message buffer (TXE = 0) be aborted. The MSCAN08 will grant the
request if the message has not already started transmission, or if the
transmission is not successful (lost srbitration or error). When a
message is aborted the associated TXE and the abort acknowledge
flag (ABTAK) (see
346) will be set and an TXE interrupt is generated if enabled. The
CPU cannot reset ABTRQx. ABTRQx is cleared implicitly whenever
the associated TXE flag is set.
For More Information On This Product,
1 = Abort request pending
0 = No abort request
1 = A transmitter empty (transmit buffer available for transmission)
0 = No interrupt is generated from this event.
$0507
Bit 7
Figure 22. Transmitter Control Register (CTCR)
event results in a transmitter empty interrupt.
0
0
MSCAN Controller (MSCAN08)
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ABTRQ2 ABTRQ1 ABTRQ0
= Unimplemented
6
0
MSCAN08 Transmitter Flag Register
5
0
4
0
3
0
0
TXEIE2
2
0
TXEIE1
1
0
MOTOROLA
on page
TXEIE0
44-mscan
Bit 0
0