Central Processing Unit
MPC561/MPC563 Reference Manual, Rev. 1.2
3-44
Freescale Semiconductor
3.14.5
Enforce In-Order Execution of I/O (eieio) Instruction
When executing an eieio instruction, the load/store unit will wait until all previous accesses have
terminated before issuing cycles associated with load/store instructions following the eieio instruction.
3.14.6
Time Base
A description of the time base register may be found in
Chapter 6, “System Configuration and Protection
,”
and in
Chapter 8, “Clocks and Power Control
3.15
Operating Environment Architecture (OEA)
The MPC561/MPC563 has an internal memory space that includes memory-mapped control registers and
internal memory used by various modules on the chip. This memory is part of the main memory as seen
by the RCPU and can be accessed by an external system master.
3.15.1
Branch Processor Registers
3.15.1.1
Machine State Register (MSR)
The floating-point exception mode encoding in the RCPU is as shown in
:
The SF bit is reserved set to zero. The IP bit initial state after reset is set as programmed by the reset
configuration as specified by the USIU characteristics.
3.15.1.2
Branch Processors Instructions
The RCPU implements all the instructions defined for the branch processor in the UISA in the hardware.
3.15.2
Fixed-Point Processor
3.15.2.1
Special Purpose Registers
•
Unsupported Registers — The following registers are not supported by the MPC561/MPC563:
SDR, EAR, IBAT0U, IBAT0L, IBAT1U, IBAT1L, IBAT2U, IBAT2L, IBAT3U, IBAT3L,
DBAT0U, DBAT0L, DBAT1U, DBAT1L, DBAT2L, DBAT3U, DBAT3L.
•
Added Registers — For a list of added special purpose registers, refer to
, and
Table 3-21. Floating-Point Exception Mode Encoding
Mode
FE0
FE1
Ignore exceptions
0
0
Precise
0
1
Precise
1
0
Precise
1
1
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...