ARTERY AT32WB415 Series, Reference Manual

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AT32WB415 Series Reference Manual
2022.04.13 Page 31 Ver 2.00
0x2000_0004.1 0x2200_0084.0
0x2000_0004.2 0x2200_0088.0
… …
0x200F_FFFC.31 0x23FF_FFFC.0
Table 1-2 shows the mapping between bit-band region and alias region in the peripheral area:
Table 1-2 Bit-band address mapping in the peripheral area
Bit-band region Equivalent alias address
0x4000_0000.0 0x4200_0000.0
0x4000_0000.1 0x4200_0004.0
0x4000_0000.2 0x4200_0008.0
… …
0x4000_0000.31 0x4200_007C.0
0x4000_0004.0 0x4200_0080.0
0x4000_0004.1 0x4200_0084.0
0x4000_0004.2 0x4200_0088.0
… …
0x400F_FFFC.31 0x43FF_FFFC.0
In addition, bit-band operations can also simplify jump process. When jump operation is based on a bit
level, the previous steps are:
 Read the whole register
 Mask the undesired bits
 Compare and jump
For now, you just need do:
 Read the bit status from the bit-band alias region
 Compare and jump
Apart from making code more concise, its important function is also reflected in multi-task environment.
When it comes to multiple taks, it turns the read-modify-write operations into a hardware-supported
atomic operation to avoid the scenario where the read-modify-write opearion is disrupted, resulting in
disorder.
1.1.3 Interrupt and exception vectors
Table 1-3 AT32WB415 series vector table
Pos. Priority
Priority
Type
Name Description Address
- - - Reserved 0x0000_0000
-3 Fixed Reset Reset 0x0000_0004
-2 Fixed NMI
Non maskable interrupt
CRM clock fail detector (CFD) is linked
to NMI vector
0x0000_0008
-1 Fixed HardFault All class of fault 0x0000_000C
0
Configu
rable
MemoryManage Memory management 0x0000_0010
1
Configu
rable
BusFault Pre-fetch fault, memory access fault 0x0000_0014
2
Configu
rable
UsageFault Undefined instruction or illegal state 0x0000_0018
- - - Reserved
0x0000_001C~
0x0000_002B