External Bus Interface (EBI)
MPC5510 Microcontroller Family Reference Manual, Rev. 1
29-2
Freescale Semiconductor
Preliminary
Figure 29-1. EBI Block Diagram
29.1.2
Features
The EBI has these major features:
•
Multiplexed 32-bit address/data bus (single master and external master)
— In the 208-pin package, there can be up to 24 address bits with 32-bit data and four chip selects.
In the 144-pin and 176-pin packages, there are 24 address bits with only 16 bits of data and four
chip selects
•
Memory controller with support for various memory types:
— Synchronous burst SDR flash and SRAM
— Asynchronous/legacy flash and SRAM
External bus
interface
Memory
controller
External master
controller
Bus
monitor
Registers
Arbiter
Slave
interface/
CLKOUT driver
CLKOUT
crossbar switch
(AXBS)
Master
interface/
crossbar switch
(AXBS)
Peripheral
bridge
AD[0:31]
CS
[0:3]
TS
OE
RD_
WR
BDIP
TA
TEA
WE
[0:3]
(PBridge_A)
system bus
system bus
ALE