RZ/G1M
1. Overview
R01UH0626EJ0100 Rev.1.00
1-5
Sep 30,2016
1.3.3
External Bus Module
Item Description
Local bus state
controller
(LBSC)
EX-BUS interface: max. 16-bit bus
Frequency: 65 MHz
External area divided into several areas and managed
—
Allocation to space of area 0, area 1, and area 6 or allocation to space of area 0 only is
selected at startup time.
—
Area 0 supports 128-Mbyte memory space (startup mode).
—
Space of area 6 is divided into up to six areas (capacity of each area variable) and managed
—
I/F settings, bus width settings, and wait state insertion are possible for each area
SRAM interface
—
Wait states can be inserted through register settings
—
Period of waiting is set in cycle unit, and the maximum value is 15.
—
EX_WAIT pin can be used for wait state insertion
—
Connectable bus widths: 16 bits or 8 bits
Burst ROM interface
—
Wait states can be inserted through register settings
—
Number of bursts can be set through register settings
—
Connectable bus widths: 16 bits or 8 bits
Byte-control SRAM interface (available with areas 1 and 6 only)
—
Byte-control SRAM interface
—
Wait states can be inserted through register settings
—
EX_WAIT pin can be used for wait state insertion
—
Connectable bus widths: 16 bits or 8 bits
ATA interface (two ports)
—
Wait states can be inserted through register settings
—
Supports PIO modes 0 through 4
—
Supports multi-word modes 0 through 2
—
Supports Ultra DMA modes 0 through 4 (Ultra ATA66)
—
Ready timeout detection (detection time (ns) = EX-BUS operating frequency (ns) × 100 clock
cycles)
Supports external buffer enable/direction control
Summary of Contents for RZ/G1M
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