MPC561/MPC563 Reference Manual, Rev. 1.2
Freescale Semiconductor
12-1
Chapter 12
U-Bus to IMB3 Bus Interface (UIMB)
The U-bus to IMB3 bus interface (UIMB) structure is used to connect the CPU internal unified bus (U-bus)
to the intermodule bus 3 (IMB3). It controls bus communication between the U-bus and the IMB3. The
UIMB interface (see
) consists of seven submodules that control bus interface timing, address
decode, data multiplexing, intrasystem communication (interrupts), and clock generation to allow
communication between U-bus and the IMB3. The seven submodules are:
•
U-bus interface
•
IMB3 interface
•
Address decoder
•
Data multiplexer
•
Interrupt synchronizer
•
Clock control
•
Scan control
12.1
Features
•
Provides complete interfacing between the U-bus and the IMB3:
— 15 bits (32 Kbytes) of address decode on IMB3
— 32-bit data bus
— Read/write access to IMB3 module registers
— Interrupt synchronizer
— Monitoring of accesses to unimplemented addresses within UIMB interface address range
— Burst-inhibited accesses to the modules on IMB3
•
Support of 32-bit and 16-bit bus interface units (BIUs) for IMB3 modules
•
Half and full speed operation of IMB3 bus with respect to U-bus
•
Simple “slave only” U-bus interface implementation
— Transparent mode operation not supported
— Relinquish and retry not supported
•
Supports scan control for modules on the IMB3 and on the U-bus
NOTE
Modules on the IMB3 bus can only be reset by SRESET. Some modules
may have a module reset, as well.
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...