
External Bus Interface (EBI)
MPC5566 Microcontroller Reference Manual, Rev. 2
12-66
Freescale Semiconductor
12.4.2.10.3
Bus Transfers Initiated by the EBI in External Master Mode
The flow and timing for EBI-mastered transactions in external master mode is the same as described for
single master mode, except that the EBI arbitrates bus transmissions for each transaction.
The following flow and timing diagrams show the arbitration sequence added to
and
for the basic single-beat read operation. The remaining operations (writes, bursts, etc.) add
the arbitration sequence to the flow and timing diagrams shown for single-master mode. See
Section 12.4.2.4, “Single-Beat Transfer
Section 12.4.2.5, “Burst Transfer
Figure 12-43. Basic Flow Diagram of an EBI Read Access in External Master Mode
1. Assert bus busy (BB)
2. If no other master is driving,
Asserts transfer start (TS)
3. Drives address and attributes
Master (EBI)
Slave
No
Yes
External
arbitration
?
Request bus (BR)
1. Receive bus grant (BG)
asserted from external arbiter
2. Receive BB negated
3. Negate BR if no other requests
No
Yes
EBI
has priority
?
Negate BG if asserted
Receives address
Yes
No
Receives data
Drives data
Asserts
transfer acknowledge (TA)
Asserts
transfer acknowledge (TA)
CS access
?
Содержание MPC5566
Страница 12: ...MPC5566 Microcontroller Reference Manual Devices Supported MPC5566 MPC5566 RM Rev 2 0 23 Apr 2008...
Страница 81: ...Introduction MPC5566 Microcontroller Reference Manual Rev 2 1 24 Freescale Semiconductor...
Страница 135: ...Signal Description MPC5566 Microcontroller Reference Manual Rev 2 2 54 Freescale Semiconductor...
Страница 189: ...Reset MPC5566 Microcontroller Reference Manual Rev 2 4 20 Freescale Semiconductor...
Страница 331: ...System Integration Unit SIU MPC5566 Microcontroller Reference Manual Rev 2 6 128 Freescale Semiconductor...
Страница 343: ...Crossbar Switch XBAR MPC5566 Microcontroller Reference Manual Rev 2 7 12 Freescale Semiconductor...
Страница 361: ...Error Correction Status Module ECSM MPC5566 Microcontroller Reference Manual Rev 2 8 18 Freescale Semiconductor...
Страница 455: ...Interrupt Controller INTC MPC5566 Microcontroller Reference Manual Rev 2 10 42 Freescale Semiconductor...
Страница 603: ...Flash Memory MPC5566 Microcontroller Reference Manual Rev 2 13 38 Freescale Semiconductor...
Страница 609: ...SRAM MPC5566 Microcontroller Reference Manual Rev 2 14 6 Freescale Semiconductor...
Страница 679: ...Boot Assist Module BAM MPC5566 Microcontroller Reference Manual Rev 2 16 20 Freescale Semiconductor...
Страница 997: ...Deserial Serial Peripheral Interface DSPI MPC5566 Microcontroller Reference Manual Rev 2 20 72 Freescale Semiconductor...
Страница 1037: ...Enhanced Serial Communication Interface eSCI MPC5566 Microcontroller Reference Manual Rev 2 21 40 Freescale Semiconductor...
Страница 1073: ...MPC5566 Microcontroller Reference Manual Rev 2 22 36 Freescale Semiconductor...
Страница 1081: ...Voltage Regulator Controller VRC and POR Module MPC5566 Microcontroller Reference Manual Rev 2 23 8 Freescale Semiconductor...
Страница 1093: ...IEEE 1149 1 Test Access Port Controller JTAGC MPC5566 Microcontroller Reference Manual Rev 2 24 12 Freescale Semiconductor...
Страница 1185: ...Nexus MPC5566 Microcontroller Reference Manual Rev 2 25 92 Freescale Semiconductor...
Страница 1267: ...MPC5566 Reference Manual Revision History MPC5566 Microcontroller Reference Manual Rev 2 Freescale Semiconductor C 10...
Страница 1268: ...MPC5566 Reference Manual Revision History MPC5566 Microcontroller Reference Manual Rev 2 Freescale Semiconductor C 11...