MPC8544COMEDEV Freescale Semiconductor, MPC8544COMEDEV Datasheet - Page 622

• Manufacturer Part Number: MPC8544COMEDEV
• Description: KIT DEV EXPRESS MPC8544COM
• Manufacturer: Freescale Semiconductor
• Type: MPUr

Specifications of MPC8544COMEDEV

• Contents: Board
• For Use With/related Products: MPC8544
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Local Bus Controller
14.1.1
The main component of the LBC is its memory controller, which provides a seamless interface to many
types of memory devices and peripherals. The memory controller is responsible for controlling eight
memory banks shared by a high performance SDRAM machine, a GPCM, and up to three UPMs. As such,
it supports a minimal glue logic interface to synchronous DRAM (SDRAM), SRAM, EPROM, Flash
EPROM, burstable RAM, regular DRAM devices, extended data output DRAM devices, and other
peripherals. The external address latch signal (LALE) allows multiplexing of addresses with data signals
to reduce the device signal count.
The LBC also includes a number of data checking and protection features such as data parity generation
and checking, write protection and a bus monitor to ensure that each bus cycle is terminated within a
user-specified period.
14.1.2
The LBC main features are as follows:
1. Refers to the logical address space of the LBC. Once the address is decoded by the LBC,
right-most 34 bits of the 36-bit physical address space.
14-2
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Memory controller with eight memory banks
— 34-bit
— Variable memory block sizes (32 Kbytes to 4 Gbytes)
— Selection of control signal generation on a per-bank basis
— Data buffer controls activated on a per-bank basis
— Up to 256-byte bursts, arbitrarily aligned
— Automatic segmentation of large transactions
— Odd/even parity checking including read-modify-write (RMW) parity for single accesses
— Write-protection capability
— Atomic operation
— Parity byte-select
SDRAM machine
— Provides the control functions and signals for glueless connection to JEDEC-compliant
— Supports up to four concurrent open pages per device
— Supports SDRAM port size of 32, 16, and 8 bits
— Supports external address and/or command lines buffering
General-purpose chip-select machine (GPCM)
— Compatible with SRAM, EPROM, FEPROM, and peripherals
— Global (boot) chip-select available at system reset
— Boot chip-select support for 8-, 16-, 32-bit devices
— Minimum 3-clock access to external devices
SDRAM devices
Overview
Features
MPC8544E PowerQUICC III Integrated Host Processor Family Reference Manual, Rev. 1
1
address decoding with mask
the 34-bit address becomes the
Freescale Semiconductor