Unified System Interface Unit (USIU) Overview
MPC561/MPC563 Reference Manual, Rev. 1.2
5-2
Freescale Semiconductor
The USIU supports the internal Flash censorship mechanism on the MPC561/MPC563 to protect the Flash
contents. Refer to
Chapter 21, “CDR3 Flash (UC3F) EEPROM
.” It is not possible to operate the
MPC561/MPC563 from the external world while the Flash is in censorship mode and in a censorship state.
The internal Flash array will be either locked or accessible only after the entire array contents have been
erased. The MPC561/MPC563 is in censored mode if one of the following events occurs:
•
booting from external memory
•
operating in peripheral mode or if accessed from an external master
•
operating in debug mode (BDM or Nexus)
shows the USIU block diagram.
Figure 5-1. USIU Block Diagram
5.1
Memory Map and Registers
is an address map of the USIU registers and, unless otherwise noted, registers are 32 bits wide.
The address shown for each register is relative to the base address of the MPC561/MPC563 internal
memory map. The internal memory block can reside in one of eight possible 4 Mbyte memory spaces. See
for details.
Memory Control Lines
Memory
Controller
E-Bus
U-bus
Slave
Clocks & Reset
U-Bus
SGPIO
Interface
Interface
Configuration Registers
• Software Watchdog
• Bus Monitor
• Periodic Interrupt
• Timer and Decrementer
• Real-time Clock
• Debug
• Pin Multiplexing
• Interrupt Controller
Address
Data
E-bus
Interface
USIU
Su
b
b
u
s
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...