HD6417641 RENESAS [Renesas Technology Corp], HD6417641 Datasheet - Page 319
HD6417641
Manufacturer Part Number
HD6417641
Description
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
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The bus state controller (BSC) outputs control signals for various types of memory that is
connected to the external address space and external devices. BSC functions enable this LSI to
connect directly with SRAM, SDRAM, and other memory storage devices, and external devices.
12.1
The BSC has the following features:
1. Physical address space is divided into eight areas
2. Normal space interface
3. Burst ROM interface (clock asynchronous)
4. MPX-I/O interface
5. SDRAM interface
A maximum 32 or 64 Mbytes for each of the eight areas, CS0, CS2 to CS4, CS5A, CS5B,
A maximum 64 Mbytes for each of the six areas, CS0, CS2 to CS4, CS5, and CS6, totally a
Can specify the normal space interface, SRAM interface with byte selection, burst ROM
Can select the data bus width (8, 16, or 32 bits) for each address space.
Controls the insertion of the wait state for each address space.
Controls the insertion of the wait state for each read access and write access.
Can set the independent idling cycle in the continuous access for five cases: read-write (in
Supports the interface that can directly connect to the SRAM.
High-speed access to the ROM that has the page mode function.
Can directly connect to a peripheral LSI that needs an address/data multiplexing.
Can set the SDRAM up to 2 areas.
Multiplex output for row address/column address.
Efficient access by single read/single write.
High-speed access by the bank-active mode.
Supports an auto-refresh and self-refresh.
CS6A and CS6B, totally 384 Mbytes.
total of 384 Mbytes.
(clock synchronous or asynchronous), MPX-I/O, burst MPX-I/O, and SDRAM for each
address space.
same space/different space), read-read (in same space/different space), the first cycle is a
write access.
Features
Section 12 Bus State Controller (BSC)
Rev. 4.00 Sep. 14, 2005 Page 269 of 982
Section 12 Bus State Controller (BSC)
REJ09B0023-0400
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