External Bus Interface
MPC561/MPC563 Reference Manual, Rev. 1.2
Freescale Semiconductor
9-47
Figure 9-33. Retry Transfer Timing – External Arbiter
When the MPC561/MPC563 initiates a burst access, the bus interface recognizes the RETRY assertion as
a retry termination only if it detects it before the first data beat was acknowledged by the slave device.
When the RETRY signal is asserted as a termination signal on any data beat of the access after the first
(being the first data beat acknowledged by a normal TA assertion), the MPC561/MPC563 recognizes
RETRY as a transfer error acknowledge.
CLKOUT
ADDR[8:31]
TS
BR
(output)
BG
BB
Data
TA
RD/
WR
BURST
TSIZ[0:1]
RETRY (input)
ADDR
ADDR
Allow External
Master 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...