HD6417641 RENESAS [Renesas Technology Corp], HD6417641 Datasheet - Page 327
HD6417641
Manufacturer Part Number
HD6417641
Description
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
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12.3.4
The memory bus width in this LSI can be set for each area. In area 0, external pins can be used to
select word (16 bits), or longword (32 bits) on power-on reset. The correspondence between the
external pin MD3 and memory size is listed in the table below.
Table 12.4 Correspondence between External Pin MD3 and Bus Width of Area 0
12.4
The BSC has the following registers. For the addresses and access sizes of these registers, see
section 24, List of Registers.
Do not access spaces other than CS0 until the termination of the setting the memory interface.
• Common control register (CMNCR)
• Bus control register for area 0 (CS0BCR)
• Bus control register for area 2 (CS2BCR)
• Bus control register for area 3 (CS3BCR)
• Bus control register for area 4 (CS4BCR)
• Bus control register for area 5A (CS5ABCR)
• Bus control register for area 5B (CS5BBCR)
• Bus control register for area 6A (CS6ABCR)
• Bus control register for area 6B (CS6BBCR)
• Wait control register for area 0 (CS0WCR)
• Wait control register for area 2 (CS2WCR)
• Wait control register for area 3 (CS3WCR)
• Wait control register for area 4 (CS4WCR)
• Wait control register for area 5A (CS5AWCR)
• Wait control register for area 5B (CS5BWCR)
• Wait control register for area 6A (CS6AWCR)
• Wait control register for area 6B (CS6BWCR)
• SDRAM control register (SDCR)
MD3
0
1
Area 0 Memory Type and Memory Bus Width
Register Descriptions
Bus Width of Area 0
16 bits
32 bits
Rev. 4.00 Sep. 14, 2005 Page 277 of 982
Section 12 Bus State Controller (BSC)
REJ09B0023-0400
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