mcf51ac256a Freescale Semiconductor, Inc, mcf51ac256a Datasheet - Page 346

• Manufacturer Part Number: mcf51ac256a
• Description: Mcf51ac Flexis
• Manufacturer: Freescale Semiconductor, Inc

Freescale’s Controller Area Network (MSCANV1)
Section 15.3.1, “MSCAN Control Register 0
read the time stamp after the respective transmit buffer has been flagged empty.
The timer value, which is used for stamping, is taken from a free running internal CAN bit clock. A timer
overrun is not indicated by the MSCAN. The timer is reset (all bits set to 0) during initialization mode. The
CPU can only read the time stamp registers.
Read: Anytime when TXEx flag is set (see
(CANTFLG)”) and the corresponding transmit buffer is selected in CANTBSEL (see
“MSCAN Transmit Buffer Selection Register
Write: Unimplemented
15.5
15.5.1
This section provides a complete functional description of the MSCAN. It describes each of the features
and modes listed in the introduction.
15-30
Reset:
Reset:
W
W
Functional Description
R
R
General
TSR15
TSR7
x
x
7
7
MCF51AC256 ColdFire Integrated Microcontroller Reference Manual, Rev. 5
Figure 15-35. Time Stamp Register — High Byte (TSRH)
Figure 15-36. Time Stamp Register — Low Byte (TSRL)
TSR14
TSR6
6
x
6
x
TSR13
TSR5
5
x
5
x
Section 15.3.6, “MSCAN Transmitter Flag Register
(CANCTL0)”). In case of a transmission, the CPU can only
(CANTBSEL)”).
TSR12
TSR4
4
x
4
x
TSR11
TSR3
3
x
3
x
TSR10
TSR2
2
x
2
x
Freescale Semiconductor
TSR9
TSR1
Section 15.3.10,
1
x
1
x
TSR8
TSR0
0
x
0
x