MSC8113 Reference Manual, Rev. 0
Freescale Semiconductor
12-1
Memory Controller
12
The MSC8113 memory controller serves two purposes:
It supports a glueless interface to external memory and peripheral devices on the external
system bus.
It enables interfacing with the IPBus peripherals and internal memories through the
internal local bus.
The memory controller controls up to eight external memory banks that are located on the
external system bus and shared by a high-performance SDRAM machine, a General-Purpose
Chip-Select Machine (GPCM), and three User-Programmable Machines (UPMs). It supports a
glueless interface to synchronous DRAM (SDRAM), SRAM, EPROM, Flash EPROM, burstable
RAM, regular DRAM devices, extended data output DRAM devices, and other peripherals. Two
additional memory banks control access to internal resources, using the internal local bus. This
flexible memory controller allows the implementation of memory systems with very specific
timing requirements:
The SDRAM machine provides an interface to synchronous DRAMs using SDRAM
pipelining, bank interleaving, and back-to-back read or write in page mode, to achieve the
highest performance.
The GPCM provides interfacing for simpler, lower-performance memory resources and
memory-mapped devices. The GPCM has inherently lower performance because it does
not support bursting. For this reason, GPCM-controlled banks are used primarily for
boot-loading and access to low-performance memory-mapped peripherals. The GPCM
controls Bank 9 to access IPBus peripherals.
The UPM supports address multiplexing of the external bus, refresh timers, and generation
of programmable control signals for row address and column address strobes to allow for a
glueless interface to DRAMs, burstable SRAMs, and almost any other kind of peripheral.
The refresh timers allow refresh cycles to be initiated. The UPM generates programmable
timing patterns to the control signals that govern a memory device. These patterns define
how the external control signals behave during a read, write, burst-read, or burst-write
access request. Refresh timers periodically generate user-defined refresh cycles. There are
three UPMs (A, B and C) in the memory controller. UPMs A and B can be assigned either
to the system bus or to the local bus. UPM C is allocated for Bank 11, which is assigned to
internal memories (M2 memory and three M1 memories).
Summary of Contents for MSC8113
Page 1: ...MSC8113 Reference Manual Tri Core 16 Bit Digital Signal Processor MSC8113RM Rev 0 May 2008 ...
Page 20: ...MSC8113 Reference Manual Rev 0 xx Freescale Semiconductor Contents ...
Page 28: ...MSC8113 Reference Manual Rev 0 xxviii Freescale Semiconductor ...
Page 56: ...MSC8113 Reference Manual Rev 0 1 28 Freescale Semiconductor MSC8113 Overview ...
Page 76: ...MSC8113 Reference Manual Rev 0 2 20 Freescale Semiconductor SC140 Core Overview ...
Page 134: ...MSC8113 Reference Manual Rev 0 4 30 Freescale Semiconductor System Interface Unit SIU ...
Page 168: ...MSC8113 Reference Manual Rev 0 6 18 Freescale Semiconductor Boot Program ...
Page 180: ...MSC8113 Reference Manual Rev 0 7 12 Freescale Semiconductor Clocks ...
Page 260: ...MSC8113 Reference Manual Rev 0 8 80 Freescale Semiconductor Memory Map ...
Page 300: ...MSC8113 Reference Manual Rev 0 9 40 Freescale Semiconductor Extended Core ...
Page 304: ...MSC8113 Reference Manual Rev 0 10 4 Freescale Semiconductor MQBus and M2 Memory ...
Page 308: ...MSC8113 Reference Manual Rev 0 11 4 Freescale Semiconductor SQBus ...
Page 590: ...MSC8113 Reference Manual Rev 0 17 46 Freescale Semiconductor Interrupt Processing ...
Page 614: ...MSC8113 Reference Manual Rev 0 18 24 Freescale Semiconductor Debugging ...
Page 622: ...MSC8113 Reference Manual Rev 0 19 8 Freescale Semiconductor Internal Peripheral Bus IPBus ...
Page 724: ...MSC8113 Reference Manual Rev 0 21 32 Freescale Semiconductor UART ...
Page 920: ...MSC8113 Reference Manual Rev 0 25 150 Freescale Semiconductor Ethernet Controller ...
Page 1171: ...MSC8113 Reference Manual Rev 0 Freescale Semiconductor C 61 EF wait_rts P 01077FFC 9F rts 71 ...
Page 1172: ...MSC8113 Reference Manual Rev 0 C 62 Freescale Semiconductor MSC8113 Boot Code ...
Page 1202: ...MSC8113 Reference Manual Rev 0 Index 30 Freescale Semiconductor Index ...