L-Bus to U-Bus Interface (L2U)
MPC561/MPC563 Reference Manual, Rev. 1.2
11-2
Freescale Semiconductor
– Access protection: user or supervisor
– Guarded attribute: speculative or non-speculative
– Enable/disable option
– Read only option
•
Supports a default global entry for memory space not covered by other regions:
— Default access protection
— Default guarded attribute
•
Interrupt generated upon:
— Access violation
— Load from guarded region
— Write to read-only region
•
The MSR[DR] bit (data relocate) controls DMPU protection on/off operation
•
Programming is done using the mtspr/mfspr instructions to/from implementation-specific special
purpose registers.
•
No protection for accesses to the CALRAM module on the L-bus (CALRAM has its own
protection options)
11.3
L2U Block Diagram
shows a block diagram of the L-bus to U-bus interface as implemented in the overall
MPC561/MPC563 bus architecture.
Summary of Contents for MPC561
Page 84: ...MPC561 MPC563 Reference Manual Rev 1 2 lxxxiv Freescale Semiconductor...
Page 144: ...Signal Descriptions MPC561 MPC563 Reference Manual Rev 1 2 2 46 Freescale Semiconductor...
Page 206: ...Central Processing Unit MPC561 MPC563 Reference Manual Rev 1 2 3 62 Freescale Semiconductor...
Page 302: ...Reset MPC561 MPC563 Reference Manual Rev 1 2 7 14 Freescale Semiconductor...
Page 854: ...Time Processor Unit 3 MPC561 MPC563 Reference Manual Rev 1 2 19 24 Freescale Semiconductor...
Page 968: ...Development Support MPC561 MPC563 Reference Manual Rev 1 2 23 54 Freescale Semiconductor...
Page 1144: ...Internal Memory Map MPC561 MPC563 Reference Manual Rev 1 2 B 34 Freescale Semiconductor...
Page 1212: ...TPU3 ROM Functions MPC561 MPC563 Reference Manual Rev 1 2 D 60 Freescale Semiconductor...
Page 1216: ...Memory Access Timing MPC561 MPC563 Reference Manual Rev 1 2 E 4 Freescale Semiconductor...