mpc823rg Freescale Semiconductor, Inc, mpc823rg Datasheet - Page 145

• Manufacturer Part Number: mpc823rg
• Description: Mpc823 Powerquicc Integrated Communications Processor For Portable Systems
• Manufacturer: Freescale Semiconductor, Inc

More than one asynchronous interrupt cause or exception can be present at any time.
However, when more than one interrupt causes exist, only the highest priority interrupt is
taken, as shown in the following table.
6.4 THE REGISTER UNIT
The fixed-point registers bank holds thirty-two 32-bit fixed-point registers and some control
registers. The register unit holds the general register files of the core and performs the
following operations:
• Decodes the operand fields of all sequential instructions
• Drives the operand buses, as requested by the execution unit
• Performs scoreboard checking and signing
• Samples the resulting data from the writeback bus
NUMBER
1
2
3
4
5
6
Development Port Nonmaskable Interrupt
System Reset
Instruction-Related Interrupts
Peripheral Breakpoint Request or
Development Port Maskable Interrupt
External Interrupt
Decrementer Interrupt
Freescale Semiconductor, Inc.
For More Information On This Product,
INTERRUPT TYPE
Table 6-6. Interrupt Priority Mapping
MPC823 REFERENCE MANUAL
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Signal from the Development Port
NMI_L Assertion
Instruction Processing
Breakpoint Signal from any Peripheral
Signal from the Interrupt Controller
Decrementer Request
CAUSE
The PowerPC Core
6-15