HD6417618 datasheet(186/646 Pages) RENESAS

Part #	HD6417618

Description	32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7618 Series

PDF	646 Pages

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Manufacturer	RENESAS [Renesas Technology Corp]

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Section 7 Bus State Controller (BSC)

Rev. 6.00 Jun. 12, 2007 Page 154 of 610

REJ09B0131-0600

Figure 7.11 shows an example of the connection of the SDRAM with the LSI.

A14

CKE

CKIO

CSn

RAS

CAS

RD/

D15

DQMLU

DQMLL

64-Mbit SDRAM

(1 Mword x 16 bits x 4 banks)

A13

CKE

CLK

RAS

CAS

I/O15

I/O0

DQMU

DQML

This LSI

Figure 7.11 Example of 16-Bit Data-Width SDRAM Connection

Address Multiplexing: An address multiplexing is specified so that SDRAM can be connected

without external multiplexing circuitry according to the setting of bits BSZ1 and BSZ0 in

CSnBCR, AnROW1 and AnROW0 and AnCOL1 AnCOL0 in SDCR. Tables 7.10 to 7.12 show

the relationship between those settings and the bits output on 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 on these pins.

Pin A0 of SDRAM specifies a word address. Therefore, connect this A0 pin of SDRAM to pin A1

of this LSI; pin A1 pin of SDRAM to pin A2 of this LSI, and so on.

HD6417618 Datasheet(PDF) 186 Page - Renesas Technology Corp