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SH7785 Datasheet, PDF (36/1692 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer | |||
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1. Overview
Item
Local bus state
controller (LBSC)
Features
⢠A dedicated Local-bus interface
⯠Controls the external memory space divided into seven 64-Mbyte
(max.) areas
⯠The interface type, bus width, and wait-cycle insertion can be set for
each area.
⢠SRAM interface
⯠Wait-cycle insertion can be set by register values.
⯠Wait-cycle insertion by the RDY pin
⯠Connectable as area 0, 1, 2, 3, 4, 5, or 6
⯠Selectable bus width: 64-/32-/16-/8-bit
⢠Burst ROM interface
⯠Wait-cycle insertion can be set by register values.
⯠Number of units in burst transfers can be set by register values.
⯠Connectable as area 0, 1, 2, 3, 4, 5, or 6
⯠Selectable bus width: 64-/32-/16-/8-bit
⢠MPX interface
⯠Address/data multiplexing
⯠Connectable as area 1 or 4
⯠Selectable bus widths: 64-/32-bit
⢠SRAM interface with byte-control
⯠Connectable as area 1 or 4
⯠Selectable bus width: 64-/32-/16-bit
⢠PCMCIA interface (only for little-endian mode)
⯠Wait-cycle insertion can be set by register values.
⯠Bus-sizing function for adaptation to the I/O bus width
⯠Connectable as area 5 or 6
⯠Selectable bus width: 16-/8-bit
⢠Supports transfer to and from E-IDE/ATAPI devices (ATA3)
⯠Supports PIO mode 4 type and multi-word DMA mode 2 type
⯠Connectable as area 5 or 6
⢠Big or little endian is selectable
Rev.1.00 Jan. 10, 2008 Page 6 of 1658
REJ09B0261-0100
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