TM4C123GH6PGE Datasheet, PDF (329/1467 Pages) Texas Instruments – Tiva Microcontroller

Tiva^™ TM4C123GH6PGE Microcontroller
Register 51: Controller Area Network Software Reset (SRCAN), offset 0x534
The SRCAN register provides software the capability to reset the available CAN modules. This
register provides the same capability as the legacy Software Reset Control n SRCRn registers
specifically for the CAN modules and has the same bit polarity as the corresponding SRCRn bits.
A peripheral is reset by software using a simple two-step process:
1. Software sets a bit (or bits) in the SRCAN register. While the SRCAN bit is 1, the peripheral is
held in reset.
2. Software completes the reset process by clearing the SRCAN bit.
There may be latency from the clearing of the SRCAN bit to when the peripheral is ready for use.
Software can check the corresponding PRCAN bit to be sure.
Important: This register should be used to reset the CAN modules. To support legacy software,
the SRCR0 register is available. Setting a bit in the SRCR0 register also resets the
corresponding module. Any bits that are changed by writing to the SRCR0 register can
be read back correctly when reading the SRCR0 register. If software uses this register
to reset a legacy peripheral (such as CAN0), the write causes proper operation, but the
value of that bit is not reflected in the SRCR0 register. If software uses both legacy and
peripheral-specific register accesses, the peripheral-specific registers must be accessed
by read-modify-write operations that affect only peripherals that are not present in the
legacy registers. In this manner, both the peripheral-specific and legacy registers have
coherent information.
Controller Area Network Software Reset (SRCAN)
Base 0x400F.E000
Offset 0x534
Type RW, reset 0x0000.0000
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
reserved
Type RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
Reset
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
reserved
R1
R0
Type RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RW
RW
Reset
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Bit/Field
31:2
1
Name
reserved
R1
Type
RO
RW
Reset
0
0
Description
Software should not rely on the value of a reserved bit. To provide
compatibility with future products, the value of a reserved bit should be
preserved across a read-modify-write operation.
CAN Module 1 Software Reset
Value Description
0 CAN module 1 is not reset.
1 CAN module 1 is reset.
June 12, 2014
329
Texas Instruments-Production Data