PXR40RM Datasheet, PDF (415/1434 Pages) Freescale Semiconductor, Inc – PXR40 Microcontroller

Core (e200z7) Overview
13.7 Interrupt Vector Prefix Registers (IVPR)
The Interrupt Vector Prefix Register is used during interrupt processing for determining the starting
address of a software handler used to handle an interrupt. The value contained in the Vector Offset field of
the IVOR selected for a particular interrupt type is concatenated with the value held in the Interrupt Vector
Prefix register (IVPR) to form an instruction address from which execution is to begin. The format of
IVPR is shown below.
Vector Base
0
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
SPR - 63; Read/Write
Figure 13-15. PXR40 Interrupt Vector Prefix Register (IVPR)
The IVPR fields are defined in Table 13-14.
Table 13-14. IVPR Register Fields
Field
Description
Vector Base
0–15
Vec Base
This field is used to define the base location of the vector table, aligned to a 64Kbyte boundary.
This field provides the high-order 16 bits of the location of all interrupt handlers. The contents of
the IVORxx register appropriate for the type of exception being processed are concatenated with
the IVPR Vector Base to form the address of the handler in memory.
16–31 Reserved
13.8 Interrupt Vector Offset Registers (IVORxx)
The Interrupt Vector Offset Registers are used during interrupt processing for determining the starting
address of a software handler used to handle an interrupt. The value contained in the Vector Offset field of
the IVOR selected for a particular interrupt type is concatenated with the value held in the Interrupt Vector
Prefix register (IVPR) to form an instruction address from which execution is to begin. The format of a
PXR40 IVOR is shown below.
0
Vector Offset
0
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
SPR - 400-415, 528-530; Read/Write
Figure 13-16. PXR40 Interrupt Vector Offset Register (IVOR)
Freescale Semiconductor
PXR40 Microcontroller Reference Manual, Rev. 1
13-27