PXN20RM Datasheet, PDF (409/1376 Pages) Freescale Semiconductor, Inc – PXN20 Microcontroller

e200z0 Core (Z0)
14.3.3 e200z0 Core Complex Features not Supported on the PXN20
The PXN20 implements a subset of the e200z0 core complex features. The e200z0 core complex features
that are not supported in the PXN20 are described in Table 14-2.
Table 14-2. e200z0 Features Not Supported on the PXN20
Description
The less significant halfword of the Processor Version Register (PVR) provides the revision
level which is comprised of the following three bit fields:
Reserved = 0x00
Revision = 0x0
ID = 0x0
The more significant halfword of the Processor Version Register (PVR) provides the
processor type and version number (see Table 14-1).
Nexus registers are not accessible by code running in User or Supervisor mode. Nexus
registers can be accessed only by external tools via the Nexus port.
Function/Category
PVR Value
Debug
14.4 Interrupt Types
The interrupts implemented on the PXN20 and the exception conditions that cause them are listed in
Table 14-3.
Interrupt Type
System reset
Critical Input
Machine check
Data Storage
Instruction
Storage
External Input
Alignment
Program
Floating-point
unavailable
System call
Table 14-3. Exceptions and Conditions
Interrupt Vector
Offset Register
none, vector to
address determined
by CRP_Z0VEC
IVOR 0¹
IVOR 1
IVOR 2
IVOR 3
IVOR 4¹
IVOR 5
IVOR 6
Causing Conditions
1. Reset.
2. Debug Reset Control.
Non-maskable interrupt request and MSR[CE] = 1.
1. Machine check error and MSR[ME] = 1.
2. Bus error (XTE) with MSR[EE] = 0 and current MSR[ME] = 1
1. Access control. (unused on e200z0)
2. Precise external termination error and MSR[EE] = 1.
1. Access control. (unused on e200z0)
2. Precise external termination error and MSR[EE] = 1.
Interrupt request and MSR[EE] = 1.
1. lmw, stmw not word aligned.
2. lwarx or stwcx. not word aligned.
Illegal, Privileged, Trap, Unimplemented Operation.
IVOR 7
Unused
IVOR 8
Execution of the System Call (se_sc) instruction
Freescale Semiconductor
PXN20 Microcontroller Reference Manual, Rev. 1
14-11