HD6417320 RENESAS [Renesas Technology Corp], HD6417320 Datasheet - Page 410
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HD6417320
Manufacturer Part Number
HD6417320
Description
Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7700 Series
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
1.HD6417320.pdf
(1524 pages)
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Section 9
(2)
An address multiplexing is specified so that SDRAM can be connected without external
multiplexing circuitry according to the setting of bits BSZ[1:0]in CSnBCR, AxROW[1:0] and
AxCOL[1:0] in SDCR. Tables 9.12 to 9.17 show the relationship between the settings of bits
BSZ[1:0], AxROW[1:0], and AxCOL[1:0] and the bits output at the address pins. Do not specify
those bits in the manner other than this table, otherwise the operation of this LSI is not guaranteed.
A25 to A18 are not multiplexed and the original values of address are always output at these pins.
When the data bus width is 16 bits (BSZ[1:0] =B'10), A0 of SDRAM specifies a word address.
Therefore, connect this A0 pin of SDRAM to the A1 pin of the LSI; the A1 pin of SDRAM to the
A2 pin of the LSI, and so on. When the data bus width is 32 bits (BSZ[1:0] =B'11), the A0 pin of
SDRAM specifies a longword address. Therefore, connect this A0 pin of SDRAM to the A2 pin of
the LSI; the A1 pin of SDRAM to the A3 pin of the LSI, and so on.
Rev. 3.00 Jan. 18, 2008 Page 348 of 1458
REJ09B0033-0300
Address Multiplexing
Bus State Controller (BSC)
This LSI
Figure 9.13
DQMLU
DQMLL
RD/WR
CKIO
CKE
RAS
CAS
CSn
D15
A14
A1
D0
Example of 16-Bit Data-Width SDRAM Connection
(1M x 16 bits x 4 banks)
64-Mbit SDRAM
A13
A0
CKE
CLK
CS
RAS
CAS
WE
I/O15
I/O0
DQMU
DQML
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