Datasheet

MSCAN
MC9S12DP256 — Revision 1.1
MSCAN
INITRQ=1 and INITAK=1. Depending on the setting of the WUPE bit
the MSCAN will clear the flag if it detects bus activity on CAN while in
Sleep Mode.
1 = Sleep Mode Active – The MSCAN has entered Sleep Mode.
0 = Running – The MSCAN operates normally.
INITAK — Initialization Mode Acknowledge
This flag indicates whether the MSCAN module is in Initialization
Mode (see MSCAN Initialization Mode). It is used as a handshake flag
for the INITRQ Initialization Mode request. Initialization Mode is active
when INITRQ=1 and INITAK=1.
The registers CANCTL1, CANBTR0, CANBTR1, CANIDAC,
CANIDAR0–7, CANIDMR0–7 can only be written by the CPU when
the MSCAN is in Initialization Mode.
1 = Initialization Mode Active – The MSCAN has entered
Initialization Mode.
0 = Running – The MSCAN operates normally.
MSCAN Bus Timing
Register 0
(CANBTR0)
The CANBTR0 register provides for various bus timing control of the
MSCAN module as described below.
Read: anytime
Write: anytime in Initialization Mode (INITRQ=1 and INITAK=1)
SJW1, SJW0 — Synchronization Jump Width
The synchronization jump width defines the maximum number of time
quanta (Tq) clock cycles a bit can be shortened or lengthened to
achieve resynchronization to data transitions on the bus (see
Table 87).
Address Offset: $0002
Bit 7 654321Bit 0
Read:
SJW1 SJW0 BRP5 BRP4 BRP3 BRP2 BRP1 BRP0
Write:
Reset: 00000000
Freescale Semiconductor, I
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
nc...