Burst Buffer Controller 2 Module
MPC561/MPC563 Reference Manual, Rev. 1.2
4-16
Freescale Semiconductor
Figure 4-5. BTB Block Diagram
4.5.1.1
BTB Invalidation
Write access to any BBC special purpose register invalidates all BTB entries.
NOTE
To guarantee that the BTB does not contain instructions that may have been
changed, the BTB contents should be invalidated any time instruction
memory is modified.
4.5.1.2
BTB Enabling/Disabling
The BTB operation may be enabled or disabled by programming the BTEE bit in the BBCMCR register.
4.5.1.3
BTB Inhibit Regions
The BTB operation may be inhibited regarding some memory regions. The BTB caching is inhibited for
a region if the BTBINH bit is set in the region attribute register (or global region attribute register). See
Instruction Buffers
Instruction Buffers
Instruction Buffers
Tag Register/Comparator
Next Address
VDC
V
Tag Register/Comparator
Next Address
VDC
V
Tag Register/Comparator
Next Address
VDC
V
Tag Register/Comparator
Next Address
VDC
V
Tag Register/Comparator
Next Address
VDC
V
Tag Register/Comparator
Next Address
VDC
V
Tag Register/Comparator
Next Address
VDC
V
Tag Register/Comparator
Next Address
VDC
V
32-bit
Instruction
Address
Hit
Hit
Hit
Hit
Hit
Hit
Hit
Hit
BTB Hit
BTE TAG Register File
BTE Memory Array
Instruction Buffers
Instruction Buffers
Instruction Buffers
Instruction Buffers
Instruction Buffers
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...