External Bus Interface
MPC561/MPC563 Reference Manual, Rev. 1.2
Freescale Semiconductor
9-51
Figure 9-36. Basic Flow of an External Master Write Access
describe read and write cycles from an external master
accessing internal space in the MPC561/MPC563.
NOTE
The minimum number of wait states for such access is two clocks. The
accesses in these figures are valid for both peripheral mode and slave mode.
External Master
1. Asserts Transfer Acknowledge (TA)
Address in Internal
Memory Map
No
Yes
Asserts CSx
If In Range
Memory
Controller
1. Drives Data
1. Receives Address
1. Receives Data
MPC500 Device
1. Request Bus (
BR
)
2. Receives Bus Grant (
BG
) From Arbiter
3. Asserts Bus Busy (
BB
) if No Other Master is Driving
4. Assert Transfer Start (
TS
)
5. Drives Address and Attributes
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...