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| LM3S5D91 Datasheet, PDF (885/1340 Pages) Texas Instruments – Stellaris® LM3S5D91 Microcontroller | |||
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Stellaris® LM3S5D91 Microcontroller
tTSeg1 = tProp + tPhase1
tTSeg1 = (1 * tq) + (4 * tq)
tTSeg1 = 5 * tq
tTSeg2 = tPhase2
tTSeg2 = (Information Processing Time + 4) Ã tq
tTSeg2 = 4 * tq
\\Assumes IPT=0
tSJW = 4 * tq
\\Least of 4, Phase1, and Phase2
TSEG2
TSEG1
SJW
BRP
= TSeg2 -1
= 4-1
=3
= TSeg1 -1
= 5-1
=4
= SJW -1
= 4-1
=3
= Baud rate prescaler - 1
= 50-1
=49
The final value programmed into the CANBIT register = 0x34F1.
17.4
Register Map
Table 17-6 on page 885 lists the registers. All addresses given are relative to the CAN base address
of:
â CAN0: 0x4004.0000
â CAN1: 0x4004.1000
Note that the CAN controller clock must be enabled before the registers can be programmed (see
page 260). There must be a delay of 3 system clocks after the CAN module clock is enabled before
any CAN module registers are accessed.
Table 17-6. CAN Register Map
Offset Name
Type
0x000 CANCTL
R/W
0x004 CANSTS
R/W
0x008 CANERR
RO
0x00C CANBIT
R/W
0x010 CANINT
RO
0x014 CANTST
R/W
0x018 CANBRPE
R/W
0x020 CANIF1CRQ
R/W
Reset
0x0000.0001
0x0000.0000
0x0000.0000
0x0000.2301
0x0000.0000
0x0000.0000
0x0000.0000
0x0000.0001
Description
CAN Control
CAN Status
CAN Error Counter
CAN Bit Timing
CAN Interrupt
CAN Test
CAN Baud Rate Prescaler Extension
CAN IF1 Command Request
See
page
888
890
893
894
895
896
898
899
January 22, 2012
885
Texas Instruments-Production Data
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