LFDAS12XSCT Freescale Semiconductor, LFDAS12XSCT Datasheet - Page 329

• Manufacturer Part Number: LFDAS12XSCT
• Description: HARDWARE MC9S12XS 48-PIN
• Manufacturer: Freescale Semiconductor

Specifications of LFDAS12XSCT

• Module/board Type: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: -

In cases of more than one buffer having the same lowest priority, the message buffer with the lower index
number wins.
1. Read: Anytime when TXEx flag is set (see
11.3.3.5
If the TIME bit is enabled, the MSCAN will write a time stamp to the respective registers in the active
transmit or receive buffer right after the EOF of a valid message on the CAN bus (see
“MSCAN Control Register 0
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.
1. Read: Anytime when TXEx flag is set (see
Freescale Semiconductor
Module Base + 0x00XD
Module Base + 0x00XE
corresponding transmit buffer is selected in CANTBSEL (see
(CANTBSEL)”)
Write: Anytime when TXEx flag is set (see
corresponding transmit buffer is selected in CANTBSEL (see
(CANTBSEL)”)
corresponding transmit buffer is selected in CANTBSEL (see
(CANTBSEL)”)
Write: Unimplemented
•
Reset:
Reset:
The transmission buffer with the lowest local priority field wins the prioritization.
W
W
R
R
Time Stamp Register (TSRH–TSRL)
TSR15
PRIO7
0
7
7
x
Figure 11-37. Time Stamp Register — High Byte (TSRH)
Figure 11-36. Transmit Buffer Priority Register (TBPR)
TSR14
PRIO6
6
0
6
x
(CANCTL0)”). In case of a transmission, the CPU can only read the time
S12XS Family Reference Manual Rev. 1.11
Section 11.3.2.7, “MSCAN Transmitter Flag Register
Section 11.3.2.7, “MSCAN Transmitter Flag Register
Section 11.3.2.7, “MSCAN Transmitter Flag Register
TSR13
PRIO5
0
5
5
x
TSR12
PRIO4
4
0
4
x
Section 11.3.2.11, “MSCAN Transmit Buffer Selection Register
Section 11.3.2.11, “MSCAN Transmit Buffer Selection Register
Section 11.3.2.11, “MSCAN Transmit Buffer Selection Register
Freescale’s Scalable Controller Area Network (S12MSCANV3)
TSR11
PRIO3
0
x
3
3
TSR10
PRIO2
2
0
2
x
(CANTFLG)”) and the
(CANTFLG)”) and the
(CANTFLG)”) and the
Access: User read/write
Access: User read/write
PRIO1
TSR9
Section 11.3.2.1,
0
x
1
1
PRIO0
TSR8
0
0
0
x
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(1)
(1)