External Bus Interface
MPC561/MPC563 Reference Manual, Rev. 1.2
Freescale Semiconductor
9-55
Note:
the delay for the internal to external cycle may be one clock or greater.
Figure 9-40. Retry of External Master Access (Internal Arbiter)
9.5.14
Show Cycle Transactions
Show cycles are representations of RCPU accesses to internal devices of the MPC561/MPC563. These
accesses are driven externally for emulation, visibility, and debugging purposes. A show cycle can have
one address phase and one data phase, or just an address phase in the case of instruction show cycles. The
cycle can be a write or a read access. The data for both the read and write accesses should be driven by the
bus master. (This is different from normal bus read and write accesses.) The address and data of the show
cycle must each be valid on the bus for one clock. The data phase must not require a transfer acknowledge
to terminate the bus show cycle.
CLKOUT
ADDR[8:31]
TS
BR
BG
(output)
BB
Data
TA
RD/
WR
BURST
TSIZ[0:1]
RETRY (output)
ADDR (external)
ADDR (internal)
Allow Internal
Access to Gain the
Bus
O
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...